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1096-100 Rev. A3 VSM..

1. MESSAGE BACKGROUND IMPORTANCE MEANING EFFECT ON TYPE COLOR MEASUREMENT Warning Yellow High Minor hardware or Can affect data software problem quality Error Red Critical Serious hardware or Data will be faulty software problem Recovering from an Error Message Most warning and error messages are recoverable meaning that the equipment automatically takes action to continue running In some cases recovery from an error might require that you restart the system If the error message states that you should deactivate the VSM application and exit PPMS MultiVu use the following sequence to gracefully end the programs and shut off the equipment 1f circumstances permit 1 Deactivate the VSM application by using the MultiVu Utilities dropdown menu as explained in Section 6 3 2 2 Step 2 in this situation you do not need to remove the VSM linear motor transport sample rod etc 2 Exit the PPMS MultiVu program by using the MultiVu File dropdown menu Figure 6 23 3 Recycle the power on the Model 1000 Modular Control System turn it off wait 10 seconds then turn it back on Start MultiVu 5 Reactivate the VSM option by selecting Utilities gt gt Activate Option from the MultiVu dropdown menus see Section 6 3 2 1 Important Even though the system can recover from an error some of your data might be lost CAUTION In the event that you l
2. Figure 4 3 Activating the VSM option with the Option Manager dialog box 2 The Activate button opens the VSM Control Center Figure 4 4 and VSM Log window hidden in Figure 4 4 see Figures 2 14 and 7 1 At this time the system also will perform a Home operation to determine the full range of travel for the sample transport by touching down and then going to the load position Ifa sample already has been installed when you activate the option e g you left your sample installed when you turned off the system the system performs a Touchdown operation Mi PPMs Multivu Simulation Mode File View Sample Sequence Measure Graph Instrument Utilities Help Do eje a a S gt n ale 2 VSM SIM No Datafie ___ il Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure VSM Sample System Status Measure Help VSM Ready Figure 4 4 Main MultiVu window and main window of the VSM Control Center VSM Log window has been minimized 3 Inthe VSM Control Center note the Install Remove Sample button which is located below the Chamber Status area and the Measure button which is located above the Status area You will use these command buttons for the sample installation centering and measurement procedures that follow 3 In other words you used the PPMS to take measurements with some other option e g Heat
3. WARNING Text is set off in this manner to signal conditions that could result in bodily harm or loss of life WARNING Text is set off in this manner to signal electrical hazards that could result in bodily harm or loss of life xviii PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 CHAPTER 1 Introduction to the VSM Option 1 1 1 2 1 2 1 1 2 2 Introduction This chapter contains the following information o Section 1 2 presents an overview of the o Section 1 4 outlines major safety VSM option considerations for working with the PPMS system o Section 1 3 discusses the VSM theory of o Section 1 5 contains information on how operation to contact your Quantum Design service representative Overview of the VSM Option What It Measures The Quantum Design Vibrating Sample Magnetometer VSM option for the Physical Property Measurement System PPMS is a fast and sensitive DC magnetometer The basic measurement is accomplished by oscillating the sample near a detection pickup coil and synchronously detecting the voltage induced By using a compact gradiometer pickup coil configuration a relatively large oscillation amplitude 1 3 mm peak and a frequency of 40 Hz the system is able to resolve magnetization changes of less than 10 emu at a data rate of 1 Hz The VSM option for the PPMS consists primarily of a VSM linear motor transport head for vibrating the sample a coils
4. ccccccessseeseeseeseeseeeeeeeeeeeeneeses 6 29 Data Acquisition section Keep and SO On esceseesseesceseeseeeecesecaeeeeeeseceaeeaeeeseaeeas 6 30 Advanced Settings section Require sweep and SO OM cooooconocioonconnconnconncnnnocnocononos 6 31 Example of a VSM LOS moei a aa a a a aAa an Ea ar Easa 7 2 Opening the VSM Log Window cecccesssesssesseeeneeeeeeeeeeecssecsaecesecnseesseeneeesereeneeeses 7 2 The Error Count poppen deste iisa ae e eE o iaaa e ee siii 7 3 A Raw Data view of a VSM data file oooncononicnnnnncnncnnonncncocncononncnranonononnncnncnn cinco 7 3 Example of a Table view of a VSM data fllO oooooncononcnncnncnnccncnncncoconoconccnnccnncnncnnno 7 4 Data File tab of the VSM Control Center cc eceeceeseeseeeececeeeeeereeaecaeeeneeaecneeeneeeees 7 6 VSM Select Data File dialog ccccccccccssscsseceteceeceeeeeceeeeseeeeeeeeeseeeseeeseeeaeeesaeeaees 7 6 Entering sample properties for a new data file ececeeeecceceeeeeeeceseceeeeeeeeeneeenees 7 6 Examining sample properties with the Sample tab 0 0 0 ce ccececeeeesceteceeeeeeeeeeneeenees 7 6 Dialog for appending a comment to a file now or in the future ee eeeeeeees 7 7 Using the sequence editor and the Sequence Commands bat ecceeceeseeeeeeeeeees 7 7 Select a Sequence File dialog neoini annta ea aeie eaaa i Ee ea aata 7 8 Command dialog for changing the data file during a sequence measurement 7 9 Model CM A VSM motor module 4101
5. Model 1000 or Control center for CAN modules modular control system or module tower Model CM A or Motor 4101 100 The VSM motor module module Model CM B or VSM 4101 150 The VSM detection module module Module bay The slot in the Model 1000 modular control system where a QD module is inserted G 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Glossary STANDARD TERM QD PART DEFINITION NUMBER Motor drive cable 3096 200 Carries drive currents and encoder read back for linear motor in head Motor module or 4101 100 The VSM motor module Model CM A Pickup coils o The counter wound detection coils in the coilset puck Position The value in mm as read from the motor position encoder The term position always refers to this absolute scale The zero of the encoder is set only during a reset of the hardware e g in the Setup and Configure Magnetometer Wizard and remains persistent throughout multiple samples and runs Position encoder Optical encoder in the head that reads out the vertical position of the armature Preamp cable assembly 3096 300 Carries signals from detection coilset s Tool used to lower the puck into the sample tube of the PPMS This tool is also referred to as the sample holder tool or the sample insertion sample extraction tool depending on context Puck insertion puck extraction tool Puck surface See
6. Select YSM Harware to use Standard VSM Option C VSM Oven Option Figure 4 7 The VSM Install wizard page 2 Selecting the standard low temperature VSM option Click on the radio button next to Standard VSM Option and then click on the Next gt gt button at the bottom of the window If you have installed the VSM Oven option new instructions will appear Figure 4 8 directing you to remove the oven access port from the linear motor transport and replace it with the standard cap When you have replaced the oven access port with the standard cap click on the Next gt gt button SM Install Remove Sample Wizard k x Chamber Status 305 K Stable Venting continuously Instructions Replace the oven access port on top of the VSM head with the standard cap TF Use Extended Purge lt lt Back Cancel Figure 4 8 The VSM Install wizard Cover the VSM head with the standard cap PPMS VSM Option User s Manual Rev A3 4 7 January 2008 Section 4 3 Chapter 4 Installing a Sample Taking VSM Measurements 8 Page 3 of the VSM Install wizard will open Figure 4 9A and guide you through the process of designating creating or opening an output data file YSM Install Remove Sample Wizard x M Output Data File Path Browse File Name CLICK BROWSE TO SELECT A DATA FILE Title Sample Information Material Comment Mass mg Size
7. A 3 1 Indicator LEDs The front panel of the Model CM A VSM motor module has two LEDs in the top left as shown in Figure A 1 The PWR LED indicates the power on status of the module The COP CANopen Protocol LED indicates the status of the CAN network controller Table A 2 outlines the LED states and provides solutions in the event of a problem Important The error information in Table A 2 refers to situations that persist for longer than about 15 seconds Typically when the module is powered on the LEDs may briefly flash red before they turn green This is a normal part of the startup or reset sequence Table A 2 LED guide for Model CM A VSM motor module LED COLOR STATUS MEANING AND OR SOLUTION PWR Green On The processor is running with no errors normal Red Flashing Errors were encountered during the self test The flashing sequence can be used to determine the cause of the failure COP Green On CAN status is operational normal Flashing CAN status is pre operational Verify that cable is connected to PC Red On or Error on the CAN bus Contact flashing Quantum Design for assistance If you are unable to achieve operation with both LEDs green please contact Quantum Design for assistance Quantum Design PPMS VSM Option User s Manual Rev A3 A 3 January 2008 Section A 3 Appendix A Model CM A VSM Motor Module Front Panel Model CM A VSM
8. 4 In the Field dialog box click on the Close button Section 2 3 Reconfiguring the PPMS for the VSM Option x Status Field 395267 0 Qe State Persistent Control Set Point 100 De Rate 100 0 Oe sec Approach Linea y Mode Persistent gt Close Field dialog box Figure 2 19 Setting the field to zero 0 with the WARNING Verify that there are no nearby sources of magnetic field e g NMR or other laboratory magnets before attempting to install or remove the linear motor transport as explained in Section 1 4 1 5 Open the Chamber dialog box Figure 2 20 to vent the PPMS sample chamber e Select Instrument gt gt Chamber e Click on the Vent Cont button e Click on the Close button 6 Remove any sample puck or PPMS option that is installed in the sample chamber Refer to the Physical Property Measurement System Hardware Manual for instructions on removing a sample puck Refer to the appropriate PPMS option manual to remove an option Le x r Status r Control Pressure 0 16 Torr Sensor Baratron State AtHiWac Pump Cont Purge Seal Vent Seal Vent Cont Figure 2 20 Venting the chamber with the Chamber dialog box 7 Remove the standard centering ring or any other hardware that is present from the top flange of the PPMS Quantum Design PPMS VSM Option User s Manual Rev A3 Januar
9. APPROXIMATE FIELDS Approximate Fields settings The Approximate Fields list Figure 6 36 displays in sequence a close estimate of the fields where the VSM will take data points based on all your selections in the Field Sequence Field Control and Data Acquisition sections of the Setup tab Quantum Design PPMS VSM Option User s Manual Rev A3 6 25 January 2008 Section 6 9 Chapter 6 Sequence Mode VSM Moment vs Field Command VSM Software 6 9 2 5 ESTIMATED The Estimated area Figure 6 36 displays the estimated amount of time in hours and minutes that will be needed to complete the measurement as well as the estimated number of lines in the output data file The estimated number of lines in the output data file is also the total number of data points generated by your measurement 6 9 3 Sequence Mode VSM Moment versus Field Dialog Advanced Tab The Advanced tab Figure 6 30 organizes the settings for measurement details e g the VSM measurement parameters and the field approach mode and has options that control how the VSM takes measurement data Experienced users will notice that the Centering Ranging PPMS Data Logging and Excitation Parameters subsections of this tab are identical in form and function to sections of the VSM Measurement dialog 6 9 3 1 CENTERING SETTINGS Use the Centering section of the Advanced tab to set the conditions for the VSM to perform touchdown operations For more information on Cen
10. Figure 6 2 The MultiVu Status Bar and the Sequence Temperature Field and Chamber sections PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 Section 6 3 VSM Software MultiVu Software Application For example if you click on the Temperature panel the Temperature System dialog box will open so that you can change the temperature set point and the mode and rate of change This dialog box is the same one that opens when you select Instrument gt gt Temperature from the MultiVu dropdown menus The Status bar also displays color coded warning and error messages to alert you to possible problems with any of those components See the Physical Properties Measurement System PPMS MultiVu Application User s Manual for detailed information about the error messages and the MultiVu application 6 3 2 VSM Commands in MultiVu The VSM specific commands and dialogs appear in the MultiVu software application after you install the VSM option see Chapter 2 and activate the VSM application see Section 6 3 2 1 and Figure 6 3 The VSM software application includes immediate mode and sequence mode measurement commands You can access and initiate immediate mode commands by using the dropdown menus in the MultiVu window or by using tabs dialogs and buttons in the VSM Control Center as explained in Section 6 5 Sequence mode commands are essentially encapsulated versions of immediate mode commands For example as expl
11. Note The data format menu items e g Raw Data Table do not appear in the View menu until you have opened a data file as is demonstrated by Figure 7 2 For more information on viewing data files see the Physical Property Measurement System PPMS MultiVu Application User s Manual Miprms Multi u new vsm1 dat Simulation Mode File View Sample Sequence Measure Graph Instrument Utilities Window Help leli eo ajaj S gt u ale 2 new vsm1 dat rene ieee Frequency Hz Peak Amplitude E pedra Del Action 140000 12 45 140000 140000 0 00660302233191409 6 65619470102032 i 1 967805005167 12 45 12 45 13 140000 0 00659153748687397 6 58428865258907 1 96934661839 12 45 13 E 140000 140000 0 00660302233191409 6 65619470102032 1 967805005167 12 45 5 05 1 9 140000 0 00659153748687 397 6 58428065258907 1 969346618379 5 05 140000 0 0065979703703665 0 006590429450291 43 2 1 2 1 1 6 7 7593272975925 1 6 61908859678761 1 968659847551 1 397043996572 5 05 5 05 0 00658965948250157 6 22061 78458838 1969858744716 5 05 0 00659572604747971 6 8219575409974E 1 96977151700 5 05 0 00659293600059497 6 70692738109491 1 96940533376 5 05 0 00659911113976048 6 7713462074325E 1 96829324534 5 05 0 00659901 303356261 6 8252369743201E 1 96923252543 5 05 140000 0 00660
12. Press Open Chamber to do the following things Bring the sample chamber to room temperature Vent the sample chamber Move the transport to load position Otherwise press Skip gt gt Open Chamber JP Use Extended Purge lt lt Back Skip gt gt Cancel Figure 6 7 The MultiVu window the Sample dropdown menu with VSM immediate mode commands and the VSM Install Remove Sample Wizard o To provide the software with the location of the sample select Sample gt gt VSM Manual Locate The Specify Sample Location dialog will open Figure 6 8 so that you can enter the sample offset or perform an automatic scan This dialog also appears when you use the VSM Install Remove Sample Wizard to install a sample Section 4 3 3 Specify Sample Location x Sample Holder Coordinates for Center Position SameHode S 33 79 mm LastiScan Offset EXE mm lt Scan for Sample Offset A A Enter Oletmanualy 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 Advanced Centering Sample Offset mm Figure 6 8 The Specify Sample Location dialog that opens from the dropdown menu when you select Sample gt gt VSM Manual Locate 6 4 3 Measure If a sample has been installed in the VSM you can use the Measure dropdown menu at the top of the MultiVu window Figure 6 9 to open immediate mode VSM measurement dialogs e g for setting up and taking measurements for centering the sample
13. You do not need to remove the VSM linear motor transport and its associated hardware from the PPMS while the system is idle However if you intend to use the PPMS for other types of measurements e g Heat Capacity Thermal Transport you must first remove the VSM option As summarized below you will use the VSM Install Remove Sample Wizard to prepare the system so that you can remove the linear motor transport sample tube and coilset puck These procedures are essentially the reverse of the installation procedure Summary of VSM Removal Procedures 1 Prepare for removal of the VSM transport and hardware a Set the field to zero b Use the VSM Install Remove Sample Wizard to warm the sample chamber to 300 K vent the chamber and move the transport to the load position c Remove the sample rod d Shut down the linear motor transport 2 Deactivate the VSM software application 3 Remove the linear motor transport and place it in the storage case 4 Remove the sample tube and the coilset puck 2 4 1 Prepare for Removal 1 If necessary activate the VSM software from MultiVu select Utilities gt gt Activate Option gt gt VSM as explained in Section 2 3 5 2 Ifthe field is not zero set it to zero by using the Field dialog box Figure 2 19 e Select Instrument gt gt Field e Inthe Field dialog box specify a set point of zero 0 Oe e Click on the Set button e Leave the dialog box open so that you can monitor the
14. received all the components before you start the installation process Quantum Design PPMS VSM Option User s Manual Rev A3 2 1 January 2008 Section 2 2 Chapter 2 Initial Installation of the Hardware and Software Installing and Removing the VSM Option Table 2 1 PPMS VSM system components COMPONENT PART ILLUSTRATION NUMBER Linear Motor Transport sometimes referred to as 4096 400 Figures 2 1 2 9 5 1 the Head or the VSM Transport Extender tube flange sometimes referred to as the 4096 418 and Figures 2 9 5 1 Bottom Weldment Flange and O rings VON2 030 Storage Case 4096 150 Figure 5 2 Coilset Assembly 4096 204 Figures 2 1 2 5 2 6 5 3 5 4 Sample Tube 4096 301 Figures 2 1 2 7 2 8 5 5 Two Sample Rods 4096 352 Figures 2 1 5 6 Five Sample Holders paddle shaped 4096 392 Figure 3 2 Five Sample Holders trough shaped 4096 391 Figure 3 1 Preamp Cable Assembly 3096 300 Figures 2 1 2 11 5 9 Motor Drive Cable 3096 200 Figures 2 1 2 11 5 10 VSM Motor Sync Cable 3096 400 Figures 2 1 2 11 5 11 Model CM A Motor Module 4101 100 Figures 2 1 2 11 5 12 Model CM B VSM Module 4101 150 Figures 2 1 2 11 5 13 Model 1000 Modular Control System 4100 001 Figures 2 1 5 14 CAN Network Adapter Kit 4100 100 CAN PCI card PCI 165A CAN cable 3100 024 VSM Option User s Kit 4096 100 Figure 5 7 VSM MultiVu Ap
15. 10 to hold the linear motor transport onto the stabilizer post 2 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 2 Installing and Removing the VSM Option Initial Installation ofthe Hardware and Software 1 Prepare the extender tube flange e Locate the extender tube flange and the flange O ring part number VON2 030 e Wipe the neck of the flange with a lint free cloth e g Kimwipe to remove any dust or dirt e Place the O ring into the neck of the extender tube flange Firmly press on the O ring to assure it is completely seated e Wipe the O ring and lightly grease it with silicon vacuum grease e Place the extender tube flange on a clean piece of paper or lint free cloth until it can be installed 2 Remove the VSM linear motor transport and its stand from the storage case and place them on a stable work surface keeping the motor in a vertical position 3 Remove the shipping plug from the bottom of the motor see Figure 2 9 4 Verify that the O ring of the extender tube flange is still in place and its exposed surface is clean If it is dusty or dirty clean it and lightly grease it with silicon vacuum grease 5 Screw the extender tube flange onto the bottom of the motor until it is tightly attached using Figure 2 9 for an example Hand tighten the tube only 6 Remove the VSM linear motor transport from the stand keeping it upright For example you can support the
16. 14 6 7 6 14 6 20 6 21 G 1 Center position ooooooooccccncnicccocononccnccnncnnnncnns 5 4 centering SCAN G 1 scheduling toUCHdOWNS ccoonocccccononcccccnnnns 4 2 sample location 3 4 4 1 4 4 5 8 touchdown operation 4 1 4 2 4 14 6 8 6 14 6 15 G 4 touchdown position ooooooconnicnccoccccccccnso G 4 Centering parameters 4 14 6 14 6 15 centering scan See centering operation Chamber dialog 2 5 2 6 2 15 2 23 Quantum Design PPMS VSM Option User s Manual Rev A3 coilset puck 2 2 2 6 2 12 2 13 2 16 2 18 3 1 4 2 4 3 5 3 5 4 G 1 contact TINgerS aeaieie rE T 5 4 detection coils 1 2 2 6 5 3 5 8 6 15 G 3 iInstalliQ ooooooooocnnnnnnnnnnncccccnco 2 6 2 14 2 16 pickup coils 1 1 4 1 4 3 G 3 FEMOVING coccocococccccccccninannnnnno 2 14 2 16 2 23 standard CoilSet ccoooooonnncncnncnc 3 1 5 4 comments APPO O cocococcoccccccccconanonononnncnnccnanannos 7 7 A A aad 7 7 Configure VSM System dialog 2 12 2 13 2 18 contact fingers See coilset puck contact information neee 1 7 1 8 control center See VSM Control Center cover plate See module bays D data files 4 3 4 8 4 9 4 16 6 8 6 10 6 11 7 3 7 9 CNANGING eesse ee iee 7 8 7 9 creating sessen 4 8 4 9 6 10 6 11 7 6 description iien erii eenen i 7 3 fields na NI En 7 5 SeEqUeEnCe cooocccccccoccnnnoco
17. 3 Installing a Samples iii da conside 4 4 4 3 1 Attach a Sample and Measure the Sample OffSCt ooonoconnonincnnonnoocnoocnnonnonnconncnnroconocononos 4 4 4 3 2 Activate the VSM Option and Control Center cccccecccesccsscesseeseeeseeeseeestecnsecnseeneenaeens 4 5 4 3 3 Install the Sample 0 0 cece ccceesscesseeseceseceeecseeceeeeeseeeeseeeseeeseecsaecsaecsaecnseenseenseeeeeseeeeseaeees 4 6 4 4 Taking Immediate Mode VSM Measurement cccccccscccssecsteestecseeeeeseeeeeeeeeseeeeeseeeseeesaes 4 12 4 4 1 Measure Command and VSM Measurement Dialog oooooconinccinncnoncnooncnnncnnnononocononnnonoos 4 12 4 4 2 Setting Upa Measurements iswiccccessaceas ceci vet eects de cetaveudeannesceeeiitvadhaguss seeds vda Eos 4 13 A ADA Settings Tab iii AA alan 4 13 44 22 Centering Ti A a lan eaten Sia east cde a easels 4 14 AAD 3 Advanced Tdi a 4 15 4 4 3 Starting Stopping Pausing a Measurement ccccecccessceeseeeeeeeeeceeseecseecssecsseenseenseeees 4 16 4 50 Removal a E a ad 4 17 vi PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Contents Table of Contents CHAPTER 5 NS MEA TA WA as 5 1 A A OO 5 1 5 2 VSM Hardware Component cccccecssccssecssecsseceeceseceseceseceeeeseeeseeeceseceseeeseecseeenaeeaecnseceaeenaeees 5 1 2 Binear Transportes csc33cese5i casey sdoved tue avec A ss 5 1 5 2 2 Storage Case for Linear Motor Transport cccccscccssecsseceseceseceseceeecseeceeeeesseesseeeeeeeeeaaes 5 3
18. 5 23 gt Collset Pucci NS nba is 5 3 2 Sample TUD A A eet dei eeen ales 5 5 5 25 Sample RO A REN 5 6 539 VSM Option User s Kit e 5 7 5 4 Sample Mounting Station ccecccccssecscecssecseceeceseceseceseeseeeseeeeseeeeaeeeseeeseecseeeseessecnseceaeeeaeees 5 8 5 9 VSM Electron S cti dt dd e A A Le A edad Bel Pee 5 9 5 5 1 Preamp Cable Assembly criada e ic 5 9 5 5 2 Motor Dive Cab E e dt eta biie tidad 5 9 3032 MSM Motor Syn Cable ama 5 9 5 5 4 Model CM A VSM Motor Module cccccccesccessesssceeeeseeeeeeeecseeeaecsseceseseeeeneeeeneeenes 5 10 5 5 5 Model CM B VSM Detection Module ooooonoccnnonincononnnonnconcconncon nono noconoconoconocannnnananass 5 10 5 5 6 Model 1000 Modular Control SysteM ooocoonnnoninonnonnnncnonnnonnncon ccoo noon nono noconnconncannnnnnanass 5 11 5 5 7 CAN Computer Interface Kit srani n a a a Ear 5 11 CHAPTER 6 A ovos sorso otessueeebasttesadescstuustoescete 6 1 II A RN NS 6 1 6 2 Overview of the VSM Software ccccccccssecsscssscseecseseeeseeeseesseeesaecsaecaecaecesecsseeseeseeeeeseenseeaees 6 1 6 3 MultiVu Software Application ccccccccssccssecstecesecesecesecseeseeeeeeeeeaeeeseceseeeseecseecaeesaecnaeceaeeeaeees 6 2 6 3 1 MultiVu Bas iia ais 6 2 6 3 2 VSM Commands in Multi Vu cee ccceccecseesseeseeeseeeneecseecsecsaecnsecesecnseeeeeceseeeseeeseeenaeenaees 6 3 6 3 2 1 Activating the VSM Option and the Control Center ooooonconocononnnonnnonnnannnnnccnnncnnnos 6 3 6 3 2 2 Deactivating the VSM
19. A3 Quantum Design January 2008 Chapter 6 Section 6 9 VSM Software Sequence Mode VSM Moment vs Field Command 6 9 2 Sequence Mode VSM Moment versus Field Dialog Setup Tab The Setup tab Figure 6 29 organizes the parameters relevant to a field sweep or hysteresis measurement Options in the Field Sequence Field Control and Data Acquisition subsections of the tab allow you to control the settings A scroll bar at the right side automatically displays Approximate Fields The subsections and their settings are explained below 6 9 2 1 FIELD SEQUENCE SETTINGS Use the options in the Field Sequence section Figures 6 31 and 6 32 to set the amplitude and order of the field changes during the Moment vs Field measurement Field Sequence Select Start End Quadrant Select Start End Quadrant 5000 Hinax 5000 Hmax 0 Ho 0 Ho 5000 H time 5000 H time min min Oe Click and drag to choose start and end fields De Click and drag to choose start and end fields Field Sequence Figure 6 31 Field Sequence section of the VSM Moment Figure 6 32 Field Sequence section of the VSM vs Field Setup tab Start End Quadrant de selected Moment vs Field Setup tab Start End Quadrant selected o Hmax defines the maximum field used in the measurement o Ho defines a starting or ending field used in the measurement By default Ho is the starting point of the measurement but you also can use Hmax or H min as the starting point o Hm
20. Figure 5 4 This is the surface that is touched by the end of the sample holder during a touchdown operation A CAN module e g Model CM A VSM motor module and Model CM B VSM detection module Opening in the top of the head where the sample rod is inserted QD module Sample access port The sample is mounted to this part which screws into the lower slide adapter Sample holder a a Used to insert and remove samples from the PPMS sample chamber Depending on context this item also might be referred to as the puck insertion puck extraction tool or the sample insertion sample extraction tool Sample holder tool Sample insertion sample extraction tool Used to insert and remove samples from PPMS sample chamber Depending on context this item also might be referred to as the puck insertion puck extraction tool or the sample holder tool Sample mounting station 4096 110 Fixture used for mounting and measuring sample position in sample holder Sample rod 4096 352 Sample tube 4096 301 Shipping plug Plug inserted into the bottom of the head during shipping it prevents oscillation of the suspension during shipment The VSM sample rod The term does not necessarily include the sample holder which screws on the end of the rod Quantum Design PPMS VSM Option User s Manual Rev A3 G 3 January 2008 Glossary STANDARD TERM QD PART DEFINITION NUMBER Shutdown position When the
21. Mode VSM Moment vs Temp Command VSM Software You can insert the Moment vs Temp command at any time by clicking on the OK button at the bottom of the dialog box The Cancel button closes the dialog and does not insert the command SM Moment versus Temperature x SM Moment versus Temperature x Setup Advanced Setup Advanced Temperature Contro Approx Temperatures Centering m Ranging Start 300 K Sticky Autorange fi 3 End K Delta Time fo min Always Autorange Sweep Rate fi K min Delta Field fo De Mi Delta fo K Stabilize at each Temperature Temperature FPPMS Data Logging No Automatic Centering Select Advanced Settings Sweep Continuously Data Acquisition Continuous Measuring Averaging Time fi sec Number of 25 ce Temperatures 1 Temperature fe Increment pa K Repetitions at each f Temperature Estimated J Time 02 30 h m Keep au Measurements Lines 17887 50 of measurements 20 of measurements 10 of measurements 5 of measurements 2 of measurements 1 of measurements Figure 6 38 Setup tab of the sequence mode VSM Moment versus Temperature dialog IV Require Sweep Mode For Continuous Acquisition Wait Time At 0 Each Step ES Restore Approach Mode Fast EZ Defaults M Excitation Parameters Peak Amplitude fe mm Frequency 40 ha Hz Maximum Acceleration 126 331 m sec 2 M
22. Motor Module A 3 2 Connectors and Pinout Tables A 3 2 1 JA 1 SERVO CONNECTOR This connector is used to provide the current drive to the motor and read back the position information from the encoder This connector also supports serial communication to logic associated with the motor e g serial ROM for storing calibration or configuration information about the motor dDOODOOOODODO 000000000 200000000 Figure A 3 JA 1 Servo connector for the Model CM A VSM motor module Table A 3 JA 1 Servo connector for the Model CM A VSM motor module PIN FUNCTION 1 Motor 2 5 V 3 Encoder Input A 4 Encoder Input B 5 Unused Encoder Input Z 6 n c 7 n c 8 Motor Max Limit Switch 9 Motor Min Limit Switch 10 Motor 11 Ground 12 Encoder Input A 13 Encoder Input B 14 Unused Encoder Input Z 15 n c 16 n c 17 Motor Max Limit Switch Rtn 18 Motor Min Limit Switch Rtn 19 Serial Com Data Out 20 Serial Com Data Input 21 Serial Com Clock 22 Serial Com Select 1 23 Serial Com Select 2 A 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix A Section A 3 Model CM A VSM Motor Module Model CM A VSM Motor Module Front Panel A 3 2 2 JA 2 STEPPER CONNECTOR The stepper connector is available for future expansion You must contact Quantum Design before you att
23. Remove Sample Wizard xj Chamber Status 305 K Stable Purged and sealed Instructions Press Open Chamber to do the following things Bring the sample chamber to room temperature Vent the sample chamber Move the transport to load position Otherwise press Skip gt gt Open Chamber I Use Extended Purge lt lt Back Skip gt gt Figure 4 20 The VSM Install wizard page 1 Initial instructions 3 The instructions area and button labels will reflect the process as shown in Figures 4 21A and 4 21B SM Install Remove Sample Wizard x Chamber Status 305 K Stable Venting continuously Instructions Venting chamber please wait Open Chamber J Use Extended Purge lt lt Back Skip gt Cancel Figure 4 21A The VSM Install wizard page 1 Chamber preparation Quantum Design PPMS VSM Option User s Manual Rev A3 4 17 January 2008 Section 4 5 Chapter 4 Removing a Sample Taking VSM Measurements SM Install Remove Sample Wizard x M Chamber Status 305 K Stable Venting continuously Instructions Chamber in Flooding state transport at load position Press Next to install new sample Dr Press Shutdown to remove sample and turn off transport Shutdown I Use Extended Purge lt lt Back Cancel Figure 4 21B The VSM Install wizard page 1 Shutdown transport
24. SHAPED SAMPLE HOLDERS TROUGH SHAPED SAMPLE HOLDERS Figure 5 7 VSM Option User s Kit 4096 100 5 4 Sample Mounting Station The sample mounting station 4096 110 is used to precisely locate and measure within 0 5 mm the sample offset which is the distance between the sample and the bottom of the sample holder see Figure 5 8 SAMPLE HOLDER SLIDE TO RIGHT TO RELEASE OR LOAD E SAMPLE HOLDER Figure 5 8 Sample mounting station 4096 110 The VSM measurement algorithm requires an accurate measurement of this distance so that it can perform touchdown operations See Chapters 1 and 4 for more details about touchdown operations 5 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 5 Section 5 5 VSM Hardware VSM Electronics 5 5 VSM Electronics 5 5 1 Preamp Cable Assembly Figure 5 9 shows the preamp cable assembly 3096 300 which is the electrical connection between the coilset puck and the PREAMP port JB 3 on the Model CM B detection module Integrated into the cable are dual 40 gain preamplifiers for up to two independent detection coils The preamp end of the cable is plugged into the gray connector at the PPMS probe head Figure 5 9 Preamp cable assembly 3096 300 5 5 2 Motor Drive Cable Figure 5 10 shows the VSM motor drive cable 3096 200 which connects the back of the linear motor transport to the SERVO p
25. TARGET LINE SAMPLE SCALE Figure 4 2 Reading the position of the sample from the sample mounting station 3 Remove the sample holder with the mounted sample from the mounting station and screw it onto the end of the sample rod 4 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 3 Taking VSM Measurements Installing a Sample 4 3 2 Activate the VSM Option and Control Center Important Do not use these instructions to re install the VSM option Instead follow the instructions in Section 2 3 Reconfiguring the PPMS for the VSM Option to reconfigure the PPMS for the VSM option and to reactivate the VSM software 1 To start the VSM application and open the VSM Control Center select Utilities gt gt Activate Option in the MultiVu window Figure 4 3 When the Option Manager window opens select VSM and click on the Activate button PUES Multi u Simulation Mode J 5 x Fie View Sample Sequence Measure Graph Instrument Utilities Help 0 65 bel ESE amp gt 1 2 8 2 Activate Option el 2 Configure Option Option Manager x Log PPMS Data i i A Upload Available Options Active Options ACMS b Send GPIB Commands Heat Capacity Activate gt gt Magnet gt Helium3 lt lt Deactivate Error Handling Event Log Connection Sigma Log PPMS Data Diagem Helium Fill Status Calculator Evercool
26. The following subsections describe the reconfiguration and re installation process in detail You should follow the steps closely the first time that you re install the VSM option After you are more familiar with the necessary procedures the outline below may provide you with sufficient information for many of the steps Summary of VSM Reconfiguration Procedures 1 Warm up the system set the field to zero vent the chamber and remove any existing items e g puck probe standard centering ring from the sample chamber see Figures 2 18 2 20 2 Install the VSM coilset puck and the VSM sample tube see Figures 2 5 2 8 3 Install the VSM linear motor transport see Figures 2 9 2 10 Connect the VSM motor drive cable 3096 200 to the VSM linear motor transport see Figure 2 11 5 Connect the VSM preamp cable 3096 300 to the gray Lemo connector on the probe head see Figure 2 11 Activate the VSM application from within MultiVu see Figures 2 12 2 14 Configure the VSM System see Figure 2 14 and Figures 2 16 2 17 2 3 1 Prepare for Re installation To prepare the PPMS system for re installation of the VSM option you will use the PPMS MultiVu application to warm the system to 300 K set the magnetic field to zero 0 Oe and vent the sample chamber Then after you have removed any sample puck or option that is currently installed in the chamber you will remove the centering ring from the top of the PPMS 1 Set the PPM
27. VSM Sample Properties dialog Figure 7 8 will open so that you can specify the properties and characteristics of the sample Any information that you enter in this dialog will be displayed in the Sample tab Figure 7 9 of the VSM Control Center as well as in the data file header The sample property information is optional and only for your convenience VSM measurements do not require fixed sample properties and the VSM software does not use the sample properties that you specify VSM Sample Properties xi bixi 7 Enter Sample Properties Install Data File Sample Advanced Berea flitaniumovide Material LECITA ftocksmpe SSC S STS el Comment stock sample 1 oo sample Additional Descriptive Comments Additional Descriptive Comments pe 001 o Ses Mass 001 mg Size j Volume mm Shape regular Volume mm Shape regular Molecular Weight cc Weight Status Measure Help x e VSM Ready Figure 7 8 Entering sample properties for a Figure 7 9 Examining sample properties with new data file the Sample tab When you have finished with the VSM Sample Properties dialog click on the OK button This button will return you to the Data File tab which now will display the Path File Name and Title for the new file b Ifyou select a pre existing output data file the Data File tab will re open displaying the Path File Name and Title for that file New measurement data will be appen
28. and for adding a comment to an output data file In the event you attempt to use commands in the Measure dropdown menu but you have not installed a sample a popup message will open directing you to first install a sample 6 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software Section 6 4 VSM Dropdown Menus PPMS Multi u Simulation Mode File View Sample Sequence Measure Graph Instrument Utilities Help BE a Sample VSM Datafile Comment Figure 6 9 VSM immediate mode commands in the context of the MultiVu window and the Figure 6 10 The immediate mode VSM Quantum Design Measure dropdown menu To set up and take measurements select Measure gt gt VSM Measure The VSM Measurement dialog will open Figure 6 19 with three tabs or pages of settings you can use to delineate your measurements The same dialog appears when you click on the Measure button in the VSM Control Center For a complete explanation of the VSM Measurement dialog see Section 6 5 3 To center a sample select Measure gt gt VSM Center Sample This selection sequence opens the VSM Center Sample popup Figure 6 10 which allows you to initiate touchdowns at will As explained in Chapter 4 centering operations help ensure the accuracy of measurements To add a comment to a VSM data file select Measure gt gt VSM Datafile Comment When the VSM Datafile Comment popup appears Figur
29. by going through a full travel cycle The cycle ends at the top in the sample load position The View Sample and Measure menus on the MultiVu menu bar will show VSM specific features For example the Status bar at the bottom of the VSM Control Center Figure 2 14 reads VSM Ready and VSM specific commands are accessible on the Measure dropdown menu Figure 2 15 See Chapter 6 for a full description of the VSM software PPMS VSM Option User s Manual Rev A3 January 2008 Section 2 2 Chapter 2 Initial Installation of the Hardware and Software Installing and Removing the VSM Option PMS Multi u Simulation Mode Vibrating Sample Magnetometer Initializing 7 17 2003 10 02 42 AM Resetting CAN controller board Initializing Motor module Module name Quantum Design VSM Linear Motor Servo Controller HW Version 3101 10040 SW Version 01 00 03 Initializing VSM module SM SIM No Datafile Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure VSM Sample System Status Measure Help VSM Ready Figure 2 14 VSM Control Center VSM SIM and VSM Log window if PPMS Multi u Simulation Mode SM Center Sample VSM Datafile Comment Figure 2 15 PPMS MultiVu menu bar and Measure dropdown menu for VSM option 4 Next you will verify the serial number on the detection coilset puck and test the coilset thermometer and system calib
30. cannot tolerate accelerations of this magnitude To reduce the acceleration reduce the amplitude o Max Moment is computed from Frequency 40 Hz and the Peak Amplitude entry it represents the maximum sample moment that can be measured using these settings Important Do not proceed with a measurement if the magnetic moment of your sample is larger than the calculated Max Moment as the system will not be able to complete the measurement Larger moments can be measured by using relatively small values for amplitude Ranging The Ranging setting refers to the way the system chooses the gain of the amplifiers in the VSM module during a measurement the optimal setting is typically Sticky Autorange The preamplifiers in the VSM module can change the gain ranges by factors of 10 depending on the size of the signal that is induced in the pickup coils In the rare case when you need more control than is offered by Sticky Autorange you can change the Ranging setting o Sticky Autorange recommended The system automatically increases the gain by a factor of 10 if the current peak signal drops below 2 of the current range The system automatically decreases the gain by a factor of 10 if the current peak signal exceeds 50 of the current range o Always Autorange The system automatically increases the gain by a factor of 10 if the current peak signal drops below 9 of the current range The system automatically decreases the gain by a facto
31. centering See centering operation sample holder 2 2 3 1 3 3 3 4 4 2 4 4 4 7 5 7 5 8 G 3 sample insertion extraction too 2 6 5 3 sample installation 4 4 4 6 4 12 Use Extended Purge check box 4 11 targetlinG ia di 4 4 sample length calculated effect on reported sample moment ceceeeeeees 3 1 3 2 sample location See centering operation sample mounting See mounting samples sample offset 4 2 4 4 4 6 4 7 4 9 5 8 6 6 sample position See centering operation sample location sample properties size and SOAPl oooocccccccccocononocnnnnnnnnanns 3 1 3 2 magnetic MOMent eee 3 1 3 3 recording 4 8 4 9 6 11 7 6 7 9 Sample Properties dialog 4 9 6 11 6 12 7 6 sample rod 1 3 2 2 2 7 2 19 2 21 4 4 4 6 4 7 4 17 4 18 5 1 5 2 5 5 5 7 G 3 sample Shape esseeeeeeeeeeeeeeeeees 3 1 3 3 sample size cccceeceeeeeeeceeeeeeeeeeees 3 1 3 2 sample tube 2 2 2 3 2 6 2 8 5 5 G 3 sample mounting station 205 4 4 5 7 scheduling touchdowns See centering operation Select a Sequence File dialog 6 17 7 8 Select Start End Quadrant 6 23 Index 3 January 2008 Index sequence commands VSM 4 2 6 3 6 17 6 32 7 7 7 9 INSETUINO iria 6 19 Adv Measure 6 19 6 21 Center Sample eeees 6 21 Datafile Comme
32. commands during the measurement by using the MultiVu menus Sequence files give you control over when touchdowns occur and they allow you to run a measurement without attending to the process The software application runs sequence files which contain sequences of commands that explicitly perform touchdowns see Chapter 6 Sequence commands are the preferred method for controlling the timing of touchdowns because they help you ensure the accuracy of your measurements Immediate mode commands allow you to center the sample at will by periodically selecting Measure gt gt VSM Center Sample on the main MultiVu dropdown menu bar while the VSM measurement is in progress transport which further displaces the sample Such effects can produce a displacement that exceeds the required centering accuracy of 0 1 mm 2 Refer to the Physical Properties Measurement System PPMS MultiVu Application User s Manual for more information on sequence commands and command files 4 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 2 Taking VSM Measurements Overview of VSM Measurements CAUTION Failure to perform frequent enough centering operations will lower the accuracy of measurements Automatic centering is a key quality control mechanism in the software When automatic centering has been disabled the software cannot know how far the sample has drifted from the center of the pickup coils unless a touch
33. detect the in phase and quadrature phase components of one or two input signals e g pickup coils as well as a digital reference from say a position encoder The detection is done by multiplying each of the signals by both a sine function and a cosine function These sine components are computed once per cycle and can be output at this rate or they can be averaged for multiple cycles with statistics calculated for the ensemble of measurements Other features include a thermometer bridge circuit for temperature measurements two programmable gain amplifiers in system programmable on board flash memory for program storage and a serial ROM for calibration and other configuration data The module is designed to plug into the Model 1000 modular control system or an equivalent host chassis that can provide power and the required CAN network signals to communicate with the module Quantum Design PPMS VSM Option User s Manual Rev A3 B 1 January 2008 Section B 2 Appendix B Functional Overview Model CM B VSM Detection Module a QUANTUM DESIGN i y VSW MODULE MODEL CMB Figure B 1 Model CM B VSM detection module 4101 150 B 2 1 Functional Block Diagram THERMOMETER DAC 16 bit Figure B 2 Abridged functional block diagram of the Model CM B VSM detection module B 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix B Model CM B VSM Detection Module B 2 2 B 3 B 3 1 Quantum Design Se
34. field until it is within 1000 Oe of zero do not continue until the field is within 1000 Oe of zero e Inthe Field dialog box click on the Close button Quantum Design PPMS VSM Option User s Manual Rev A3 2 19 January 2008 Section 2 4 Chapter 2 Removing the VSM Option Installing and Removing the VSM Option 3 Use the VSM Install Remove Sample Wizard to prepare the system for the remainder of the procedures removing the sample rod shutting down the linear motor transport and removing the sample tube and coilset puck e To start the wizard click on the Install Remove Sample button in the left side of the VSM Control Center just below the Chamber Status area see Figure 2 21 e The Install Remove Sample button opens the first page of the VSM Install Remove Sample Wizard dialog Figure 2 22 This page has a Chamber Status area an Instructions area and buttons to Open Chamber Skip gt gt to the next step and Cancel the operation SM Install Remove Sample Wizard xj Chamber Status 200 K Stable Sealed Fnstructions Press Open Chamber to do the following things Bring the sample chamber to room temperature Vent the sample chamber Move the transport to load position Otherwise press Skip gt gt Open Chamber TT Use Extended Purge Back Skip gt gt Figure 2 22 VSM Install Remove Sample Wizard dialog page 1 Open Chamber 4 To start the removal process click
35. head See VSM linear transport motor V VSM Center Sample Sequence dialog 6 21 VSM Change Datafile dialog 7 8 7 9 VSM Control Center 2 11 2 12 2 17 2 18 2 22 4 3 4 6 6 3 6 4 6 8 6 16 G 4 VSM Datafile Comment 6 7 6 18 6 19 7 7 VSM detection module See Model CM B Index 4 PPMS VSM Option User s Manual Rev A3 VSM head See VSM linear motor transport VSM linear motor transport head 1 1 1 3 2 2 2 7 2 10 2 16 2 17 2 23 4 2 4 11 4 17 4 18 5 1 5 3 G 3 armature nres iniiis ire inat 5 1 5 2 G 1 drive Cold iia 5 1 G 1 indicator PIN c oococoncncncninonanananananananonono 5 2 G 2 load position 2 8 2 11 4 5 4 6 shutdown position 2 21 2 22 4 18 5 2 Home homing operation 2 11 4 5 position encoder optical encoder 1 3 5 1 6 15 A 1 B 1 G 3 extender tube flange 2 7 2 9 2 16 5 2 mounting on PPMS 2 8 2 9 2 16 2 17 WINDOW oii eee ereinen oird neita i 5 2 NEL AN 2 11 2 12 6 4 7 2 VSM Measurement seq mode 6 19 6 21 Start Reconfigure ee 6 20 DOP teehee kneel nies ee ea 6 20 VSM measurements 4 1 4 3 4 12 4 16 6 1 6 6 6 7 6 13 6 17 6 20 6 22 6 24 Succes Sf da 3 3 VSM Module See Model CM B VSM detection module VSM motor module See Model CM A VSM motor module AVES Ve 0 0 9 eee 1 1 1 3 initial installation oooooooononnnnnnnnn 2 1
36. indicator pin is at the bottom of the window at the front of the head it indicates that the power is off and no sample rod is installed Stabilizer post Stinger at the top of the sample tube Standard coilset 4096 204 The coilset with the specific dimensions listed in Section 5 2 3 Stiff tapered shaft i i Main shaft of VSM sample rod see Chapter 5 Storage case 4096 150 The box for storing the head Synchronous detection The operation performed by the VSM module when acquiring signal data from the pickup coils Touchdown operation The act of slowly lowering the motor position until there is no more levitation force indicating that the bottom of the sample holder is resting on the puck surface A tiny dithering amplitude e g 0 05 mm is used during this process to avoid stiction The result is a touchdown position TP This is the position motor encoder value of zero levitation Touchdown position force as measured by the touchdown operation User s kit VSM Option 4096 100 Box of miscellaneous VSM related hardware and supplies VSM application The VSM software running in MultiVu VSM Control Center The main form presented by the VSM application containing Install Data File Sample and Advanced tabs VSM head or head 4096 400 The VSM linear motor transport VSM module or Model 4101 150 The VSM detection module CM B VSM Motor sync cable 3096 400 Cable connecting SYNC ports of the Mode
37. lot oriel de Web _ http www lot oriel com Service for Austria Belgium Crete Croatia Czech Republic Denmark England Finland France Germany Greece Hungary Ireland Israel Italy Luxembourg Netherlands Norway Poland Portugal Russia Slovakia Slovenia Spain Sweden Switzerland Turkey and Yugoslavia Japan Quantum Design Japan Sanpo Ikebukuro Building Annex 4 32 8 Ikebukuro Toshima ku Tokyo 171 0014 Japan Tel 81 3 5954 8570 Fax 81 3 5954 6570 Email qdjapan tkb att ne jp Web http www qd japan com Service for Japan Quantum Design PPMS VSM Option User s Manual Rev A3 1 7 January 2008 Section 1 5 Chapter 2 Contacting Ouantum Design Installing and Removing the VSM Option Korea Quantum Design Korea Kyungbin Building Fourth Floor 517 18 Dogok dong Kangnam gu Seoul 135 270 Korea Tel 82 2 2057 2710 Fax 82 2 2057 2712 Web _ http www qgdkorea com Service for Korea People s Republic of China Oxford Instruments Beijing Office Room 714 Office Tower 3 Henderson Center No 18 Jianguomennei Ave Dongcheng District Beijing 100005 P R China Tel 8610 6518 8160 8161 8162 Fax 8610 6518 8155 Email lambert oxford instruments com cn Web http www oxford instruments com cn Service for People s Republic of China Taiwan Omega Scientific Taiwan Ltd 5F 1 No 415 Sec 4 Hsin Yi Road Taipei Taiwan R O C Tel 886 2 8780 5228 Fax 886 2
38. mean that is the error bar on the reported moment Figure 6 19 VSM Measurement dialog and the Settings tab 6 5 3 3 VSM MEASUREMENT DIALOG SETTINGS TAB The Settings tab Figure 6 19 is divided into options for Measure Type and Measurement Parameters Measure Type After you click in the radio button to select the type of measurement to be made the data will be defined by your settings in the Measurement Parameters section o The Single Measurement option takes one measurement of the specified Averaging Time o Continuous Measuring takes measurements that last Averaging Time Ifthe Logging Interval value is less than Averaging Time a new measurement occurs every Averaging Time seconds Otherwise a new measurement occurs every Logging Interval seconds Once started Continuous Measuring takes measurements until you click on the Stop Start toggle button Quantum Design PPMS VSM Option User s Manual Rev A3 6 13 January 2008 Section 6 5 Chapter 6 VSM Control Center VSM Software Measurement Parameters o Averaging Time is the averaging time or amount of time in seconds that data are collected before it is averaged into a measurement You can set the averaging time as small as 2 cycles 0 05 sec for 40 Hz but typical values range from 1 second to 10 seconds The system rounds the entered value to the nearest cycle period For example if the VSM frequency is 40 2 Hz and you request an averagi
39. on the Open Chamber button at the bottom of the Instructions area The system software will automatically bring the chamber to room temperature vent the chamber and move the transport into the loading position The instructions area and button labels will reflect the process as shown in Figure 2 23A YSM Install Remove Sample Wizard E x Chamber Status 305 K Stable Venting continuously Instructions Setting temperature to 305 K please wait Open Chamber TF Use Extended Purge lt lt Back Cancel Figure 2 23A VSM Install Remove Sample Wizard dialog page 2 Preparing the sample chamber 5 When the instructions area indicates that the process is complete and the system is prepared for the next step install a new sample or remove a sample Figure 2 23B verify that there are no nearby sources of magnetic field 2 20 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 4 Installing and Removing the VSM Option Removing the VSM Option WARNING Verify that there are no nearby sources of magnetic field e g NMR or other laboratory magnets before you attempt to install or remove the linear motor transport as explained in Section 1 4 1 SM Install Remove Sample Wizard xj Chamber Status 305 K Stable Venting continuously Instructions Chamber in Flooding state transport at load positi
40. puck surface H 40 1 mm Measurement System Hardware Manual 5 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 5 Section 5 2 VSM Hardware VSM Hardware Components Table 5 1 Sample Connection with User Bridge Cable Connected sample puck probe head JB 3 Preamp connector on Model CM B VSM detection module 131211109 87654321 0000000000000 000000000000 N 252423222120 1918171615 14 BOTTOM VIEW SAMPLE GRAY LEMO JB 3 PREAMP FUNCTION PUCK CONNECTOR ON CM B VSM AT PROBE HEAD MODULE 3 3 5 Thermometer Current 4 4 18 Thermometer Current 5 5 6 Thermometer Voltage 6 6 19 Thermometer Voltage 11 11 10 Channel 1 Input 12 12 23 Channel 1 Input 13 13 12 Channel 2 Input 14 14 25 Channel 2 Input 5 2 4 Sample Tube You will insert the sample tube Figure 5 5 into the sample chamber after you have installed the coilset puck The sample tube provides low friction guide sleeves for the sample rod The top of the sample tube consists of an integrated O ring attached to a stabilizer post The stabilizer post provides a rigid bayonet style mount that prevents the linear motor transport from tipping over Part of the post extends into the sample chamber and part extends into the extender tube flange on the bottom of the linear motor transport as shown in Figure 2 10 CAUTION You should always use the flange clamp to hol
41. read back from the position encoder For use with other synchronous detection hardware including the Model CM B VSM detection module the real time encoder position is output digitally using a high speed serial port and as a voltage through a BNC connector Other features include in system programmable on board flash memory for program storage and a serial ROM for calibration and other configuration data The module is designed to plug into the Model 1000 modular control system or an equivalent host chassis that can provide power and the required CAN network signals that communicate with the module Quantum Design PPMS VSM Option User s Manual Rev A3 A 1 January 2008 Section A 2 Appendix A Functional Overview Model CM A VSM Motor Module Figure A 1 Model CM A VSM motor module 4101 100 A 2 1 Functional Block Diagram STEPPER MOTOR CONNECTOR MOTOR RIVER bine TEES 3 Figure A 2 Abridged functional block diagram of Model CM A VSM motor module specifications A 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix A Section A 3 Model CM A VSM Motor Module Model CM A VSM Motor Module Front Panel A 2 2 Specifications Table A 1 Electrical specifications for Model CM A VSM motor module Drive Current Limit 3A Drive Voltage Compliance Limit 20 V peak Encoder Range 32 bit Supply Voltage 24 V DC A 3 Model CM A VSM Motor Module Front Panel
42. sequence mode commands are essentially encapsulated versions of VSM immediate mode measurement commands VSM Adv Measure Center Sample Moment vs Field and Moment vs Temp sequence commands can be combined with non VSM sequence commands and looping constructs The latter are explained in the Physical Properties Measurement System PPMS MultiVu Application User s Manual The VSM sequence mode commands have interactive dialogs that help you specify your measurements and these dialogs are similar to the ones used to set up the immediate mode measurements Important Except for the general discussions this section pertains only to VSM specific sequence commands However your sequence files can include any other non VSM sequence commands that are relevant Using VSM specific sequence commands to take VSM measurements involves the following steps o Install the sample by using the VSM Install Remove Sample Wizard which you access from the dropdown menu or the VSM Control Center During the installation process you should designate an output data file You can do this at any time before you run the sequence file but you will get an error message if the file is not open when you attempt to run the sequence file o Designate open or create a sequence file o Add VSM measurement commands to the sequence file if necessary and save it o Run the sequence file 6 6 1 Opening and Creating Sequence Files To open an existing sequence f
43. system is in the load position The indicator pin will be at the bottom of the window which is the shutdown position only when the sample rod has been removed and the linear motor transport has been shut down During VSM operations the indicator pin will vibrate rapidly 1 4 mm peak to peak amplitude at 40 Hz between the load and shutdown positions Important The sample will be subject to vertical magnetic fields of up to approximately 200 gauss when it passes through the head If this is unacceptable for your samples please contact Quantum Design CAUTION The indicator pin should be at the bottom of the window when the linear motor transport has been shut down If it is NOT it indicates that the sample rod has been inadvertently left in the sample chamber Never attempt to remove the linear motor transport from the PPMS while the sample rod is still installed SAMPLE ACCESS I D MAGNETIC LOCK RING ELECTRICAL EXTENDER TUBE CONNECTOR FLANGE REAR VIEW SHIPPING PLUG FRONT VIEW Figure 5 1 VSM linear motor transport 4096 400 5 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 5 Section 5 2 VSM Hardware VSM Hardware Components 5 2 2 Storage Case for Linear Motor Transport Because the linear motor transport is both heavy and delicate Quantum Design has furnished you with a specially designed storage case to protect it during transport and storage When the linear
44. the value click on the OK button The popup dialog will close and the dialog with the Sample Offset graph will Figure 4 10B Confirming sample offset reappear Figure 4 10C Accept or reject scanned value SM Install Remove Sample Wizard x Sample Holder Coordinates for Center Position Sample Holder A O A Offset 33 73 mm e aa as AbvencedCensng Sample Offset mm lt lt Back Ena Figure 4 10C The VSM Install wizard page 4 Sample offset graphed Moment emu b To ignore the value click on the Cancel button The popup dialog will close and the dialog with the Sample Offset graph will reappear but the Offset text box will show the previous sample offset You can now perform another scan manually enter the sample offset or click on the Next gt gt button to use the previous sample offset 15 Click on the Next gt gt button at the bottom of the dialog Figure 4 10C This button opens page 5 of the VSM Install wizard Figure 4 11 which reports the sample offset position and related instructions 4 10 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 3 Taking VSM Measurements Installing a Sample SM Install Remove Sample Wizard xj f Chamber Status 305 K Stable Purged and sealed Instructions You have entered a sample offset position of 33 79 mm for touchdown centering Make sure the cap is on the trans
45. to the holder and how the sample offset is measured You will be aided in sample installation by the VSM Control Center Figure 4 4 which opens in the main MultiVu window as soon as you activate the VSM option When operating in simulation mode the title of the VSM Control Center is VSM SIM The VSM Control Center organizes VSM specific operations via automated programs wizards and four main panels or tabs the Install tab the Data File tab the Sample tab and the Advanced tab This introduction focuses on an installation method that uses the Install tab and the VSM Install Remove Sample Wizard Chapter 6 describes the VSM software application including the VSM Control Center in more detail 4 3 1 Attach a Sample and Measure the Sample Offset 1 Attach the sample to the sample holder using the techniques discussed in Chapter 3 The target line at 35 mm is the recommended mounting location but the actual sample position can be or 2 mm from this line 2 Use the sample mounting station to measure the distance from the center of the sample to the bottom of the sample holder reading the position from the scale as demonstrated in Figure 4 2 This distance is called the sample offset Measure the sample position to an accuracy of 0 5 mm Important It is important to read the actual position of the sample not the target position Accuracy is also important you should carefully measure the sample position to an accuracy of 0 5 mm
46. will collect data before it is averaged into c Number of Fields 5 In to Max a measurement See Section 6 5 3 3 for more information about Averaging Time 50 De 5 r Repetitions at pooo Number of Fields Min to Max and Field Increment each Field Keep all measurements When you are not using Continuous Measuring you must Section 6 9 Sequence Mode VSM Moment vs Field Command Data Acquisition Uniform Spacing in Field Es define the spacing between the fields with one of these options Figure 6 35 Note that when you select one of these settings you must enter a number in the associated text box before you Figure 6 35 Data Acquisition Number of Fields and Field Increment will be able to take measurements o Repetitions at each Field The value entered for Repetitions at each Field Persistent at each field Figure 6 36 is the number of data points the Sweep VSM will take at each of the fields shown in the EndMode Persistent y Approximate Fields list This option has no effect if you have selected the Sweep or Continuous Measuring mode Ceo E Keep E it umber of Fields 25 The Keep dropdown menu bar Figure 6 36 is ee AT a only available when you have selected Repetiions at Po Continuous Measurement which can generate large volumes of data Use the Keep options to choose a percentage of VSM data points that will be written to the data file See the Estimated explanation b
47. 037182633278 0 00660061 790017186 6 37047103515841 6 7088698506287 1 96892531026 1 96881287236 5 05 5 05 140000 0 006590301 27506813 1 97064679164 5 05 140000 140000 0 0066003592572364 0 00660082431 749263 6 0366415138847E 6 39787137003182 1 96761903712 1 96800699037 5 05 5 05 140000 0 00659648269195494 6 51264268731094 196955608797 5 05 pery pery pery pery PO FO FO O PO O prg perg par prg 140000 0 00658933515336328 0 00659751392531615 6 391 9886073262 7 0255279308252 lt 1 97081848612 1 96818741374 5 05 5 05 40 00 00 00 00 to to to to t0 co t0 toto colic EAS 7 E A La 110 me 12 MEE 14 15 11641 az NES EA NES ik 12041 Fan A 22 124 235 co LO 140000 ii 140000 0 0065988971 550644 6 9974283363375 2 1 96969327012 5 05 J 6 08712312856711 1 1 1 1 1 1 1 1 6 32036551147061 1 1 1 1 1 1 1 1 6 87414611 7676051 1 40 1 97037377820 1 96853380803 5 05 5 05 140000 0 00658819778905273 5 7430745236723 40 1 972139698851 Figure 7 5 Example of a Table view of a VSM data file PPMS VSM Option User s Manual Rev A3 January 2008 5 05 Quantum Design Chapter 7 VSM Architecture and Data Files 7 3 3 Section 7 3 VSM Data Files Fields in VSM Data Files Table 7 2 defines the fields in a VSM d
48. 100 ooooccniccnnocnnocnnononononononon nono nonnnconnoo A 2 Abridged functional block diagram of Model CM A VSM motor module specifications 0 cccccecsceesseesseestecsteceteceeeeeeeeeeseeeeeneenaes A 2 JA 1 Servo connector for the Model CM A VSM motor module 0 0 eee A 4 JA 3 Motor sync connector for the Model CM A VSM motor module A 5 JA 4 Aux connector for the Model CM A VSM motor module eeeeeeeeees A 6 Rear panel of the Model CM A VSM motor module 0 cccceecceseeeeeeeeeeeeeeeneeenees A 7 Quantum Design CAN connector for the Model CM A VSM motor module A 8 Model CM B VSM detection module 4101 150 oooconinccinoninonnonnnonnconnonnnononocononos B 2 Abridged functional block diagram of the Model CM B VSM detection module B 2 JB 1 Motor sync connector for the Model CM B VSM detection module B 4 JB 3 Preamp connector for the Model CM B VSM detection module B 5 Rear panel of the Model CM B VSM detection module 00 0 0 cceeccecceseeseeeeeeeeneees B 6 QD CAN connector on the rear of the Model CM B VSM detection module B 7 PPMS VSM Option User s Manual Rev A3 January 2008 Quantum Design Contents Table of Tables Tables Table 2 1 PPMS VSM system components cccccsccessseceeececeeceeeeceeaeeceeeecaeceeaaecneaeeneneeesas 2 2 Table 3 1 Calculated ratio of the reported moment to the true moment for different size cylindri
49. 2 13 re installing ooooooonnnnnnnnnnnninonanaccns 2 14 2 18 FOMOVING ene a 2 19 2 23 VSM Ppmsmvu dialog 2 21 4 18 VSM Sample Properties dialog 6 11 VSM software application 2 10 4 1 4 3 4 6 5 9 5 10 6 1 6 3 6 6 G 4 VSM Transport See VSM linear motor transport head VSM Select Data File dialog4 8 6 10 6 11 7 6 VSM Motor Sync cable See cables W WARNING safety 1 4 1 6 2 5 2 8 2 15 2 19 2 21 2 23 warning and error messages equipment 6 3 6 9 7 2 A 3 B 3 Quantum Design January 2008
50. 2 16 Note the text box for the serial number of the calibration file and the View Diagram button at the top right hand side of the dialog When you click on the View Diagram button it opens a page that displays Figure 2 11 Verify that the number in the text box matches the number of your detection coilset puck or if no number is displayed enter the serial number of your detection coilset puck in the text box Click on the Next gt gt button which opens page 2 of the Configure VSM System dialog Figure 2 17 This dialog shows the results of system tests to verify system operations When the report in the VSM System Test Results area is complete and no errors are shown click on the Finish button The Configure VSM System dialog will close and you will be back at the VSM Control Center and the Install tab The PPMS and the VSM option are now ready for you to complete the measurement preparations beginning with mounting the sample as explained in Chapter 4 First please review the material on system safety in Section 1 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 4 Installing and Removing the VSM Option Removing the VSM Option 2 4 Removing the VSM Option WARNING Verify that there are no nearby sources of magnetic field e g NMR or other laboratory magnets before attempting to install or remove the linear motor transport as explained in Section 1 4 1
51. 2 7 Complete the System Connections ccecccesccessceseceseceeeceeeeeeseeeseeeseecseecsaecsaecnaeenaeenaeens 2 10 2 28 Install the VSM SoftWare coria ile A dd iaa Ai 2 10 2 2 9 Configure the VSM System merienenn nein a a e a E 2 12 Quantum Design PPMS VSM Option User s Manual Rev A3 v January 2008 Contents Table of Contents 2 3 Reconfiguring the PPMS for the VSM Option ccccccccssecssecsteceteceeceseceseeeeeeseeeeeeeeeeeesaeenaees 2 14 2 3 1 Prepare for Re installation aroia tennein nne e i e 2 14 2 3 2 Install the VSM Coilset Puck and Insert the Sample Tube ooononnnconnncnocnnocnconnnooncnononoss 2 16 2 3 3 Install the VSM Linear Motor TranSpolTt ooocococococonnnonnnonnnnnnonnncon ccoo nooo nono nono nn cana canrnnananars 2 16 2 3 4 Connect MSM A AS ae dea e EEEa 2 17 2 3 5 Activate the VSM Option kisia sn ra n e E A a dada aE E Taaa a ERA Taa 2 17 2 3 6 Configure the VSM Systemer ii dr E ar dee cases 2 18 2 4 Removing the VSM Option cocooococcconononnnonnnnononononnnconnccon ccoo ncnn nono nono nn conan nr cnn r anar anna rn rn rn ninos 2 19 2 4 1 Prepare for Removal ci A a oo 2 19 2 4 2 Deactivate the VSM Optoma aora 2 22 2 4 3 Remove the VSM Linear Motor Transport ccccccsceesceeseesecceecseceecnseeneeseeesereeeneeees 2 23 2 4 4 Remove the VSM Sample Tube and Coilset Puck oooooconinoninocinncnoncnoonconncnnnconacannnnnnonors 2 23 CHAPTER 3 Sample Preparation and MOunting ccccccccssccscssecs
52. 2 DATA FILE TAB The Data File tab Figure 6 14 identifies the output data file that will contain the measurement data If you have not selected an output data file the File Name and Title panels in the Data File tab will be blank View Button The View button opens the graph view of the active output data file To use the View button you must have designated an output data file see Section 7 3 2 for a more complete explanation Browse Button YSM SIM No Datafile lol x The Browse button initiates a series of Install E dialogs that guide you through the process of Path designating selecting or creating a data file C gdPpms Data Sample Advanced The file designation process and the dialogs File Name are similar to the ones in the Install Remove Sample Wizard see Section 4 3 3 X Important You must designate an output data file by selecting an old file or by making Browse View a new one if you want the measurement data saved Although you can perform Help measurements when you have not designated a gua aaa ieee ma data file the measurement data will be discarded Section 7 3 4 outlines the overall Figure 6 14 Data File tab in the VSM Control Center process for creating a VSM output data file When you click on the Browse button the VSM Select Data File dialog Figure 6 15 opens showing the default data directory and a list of the existing files 6 10 PPMS VSM Op
53. 3 JB 1 Motor sync connections for the Model CM B VSM detection module B 4 Table B 4 JB 3 Preamp connector for the Model CM B VSM detection module B 5 Table B 5 QD CAN connector on the rear of the Model CM B VSM detection module B 7 Quantum Design PPMS VSM Option User s Manual Rev A3 XV January 2008 P R E FACE Contents and Conventions P 1 Introduction This preface contains the following information o Section P 2 provides an overview of the o Section P 4 shows the conventions that scope of the manual appear in the manual o Section P 3 outlines the contents of the manual P 2 Scope of the Manual This manual contains background about the PPMS Vibrating Sample Magnetometer VSM option as well as instructions for using the VSM software and hardware and performing sensitive measurements when the VSM is installed in the PPMS unit P 3 Contents of the Manual o Chapter 1 provides an overview of the VSM option and the theory of operation o Chapter 2 describes VSM installation and removal procedures and gives contact information for Quantum Design service representatives o Chapter 3 covers sample materials and how to mount them for measurement with the VSM o Chapter 4 summarizes the VSM measurement process and guides you through an immediate mode measurement with the VSM option o Chapter 5 describes the hardware and electrical components of the VSM option as well as the VSM Use
54. 8780 5225 Email lonson lin omega cana com tw Service for Taiwan Hong Kong Singapore 1 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 CHAPTER 2 Installing and Removing the VSM Option 2 1 Introduction This chapter contains the following information o Section 2 2 lists the components of theVSM option and describes the procedures you will use for the initial installation on the PPMS Section 2 3 describes the procedures you will use to reconfigure your PPMS for the VSM option after it has been configured for non VSM options Section 2 4 describes the procedures you will use to deactivate and remove the VSM option so that you can use a different measurement option 2 2 Initial Installation of the Hardware and Software This section describes the procedures you will use for the initial installation of the Quantum Design Vibrating Sample Magnetometer VSM These procedures apply only to the first time you set up and use the VSM option To re install the VSM option after it has been deactivated and a different measurement option e g the Heat Capacity option has been used you will use the procedures in Section 2 3 Reconfiguring the PPMS for the VSM Option Important Parts of the initial installation may have been performed at the factory if the VSM option was purchased as part of a new PPMS system Table 2 1 lists the components of the Quantum Design VSM option Verify that you have
55. 966 0 9921 2 1 0 9985 0 9975 0 9937 2 2 1 0002 0 9999 0 9986 2 3 1 0020 1 0029 1 0059 3 0 0 9933 0 9906 0 9808 3 1 0 9944 0 9920 0 9828 3 2 0 9976 0 9958 0 9887 3 3 1 0020 1 0013 0 9980 5 0 0 9662 0 9597 0 9367 5 1 0 9687 0 9622 0 9394 5 2 0 9759 0 9698 0 9476 5 3 0 9877 0 9820 0 9613 10 0 0 6961 0 6889 0 6647 10 1 0 6988 0 6914 0 6669 10 2 0 7070 0 6993 0 6737 10 3 0 7213 0 7130 0 6854 Table 3 1 only addresses pointlike and cylindrical samples but you can obtain similar results when you measure samples with other shapes In such cases use Table 3 1 as a rough guide to approximate the expected errors Again detection coil sensitivity for the included Palladium standard sample 4096 390 is not necessarily the same as detection coil sensitivity for samples with shapes and or sizes that differ from the included Palladium standard sample The VSM measurement software will not correct for such differences 3 2 2 Errors from Radial Offset of Sample You also should consider the radial centering of the sample in the coilset when the absolute accuracy of VSM measurement results is important Table 3 2 shows the calculated effect of radial offset for cylindrical samples of different sizes using oscillation amplitudes of 1 mm and 2 mm Note that when the centering error is only 1 mm there could be as much as 1 error in the repeated moment 3 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 3 Section 3 3 Sample Prepar
56. ANEL Figure 2 11 VSM option connections on a 9 T PPMS 2 2 8 Install the VSM Software Use the following instructions to install the MultiVu and VSM software applications on your PC see the Physical Property Measurement System MultiVu Application User s Manual for more information on MultiVu If you purchased the VSM option as part of a new PPMS system you can go to Step 3 below Verify that the VSM software is properly installed See Chapter 6 for more information on the VSM application 1 Install the most recent version of the PPMS MultiVu software Version 1 3 0 or later if it is not already installed 2 Install the VSM software by starting the VSM software setup wizard and following the instructions 3 Verify that the VSM software is properly installed by activating it from within MultiVu a Start the PPMS MultiVu application program b Goto the Utilities menu on the main MultiVu menu bar at the top of the application window c Select Utilities gt gt Activate Option Figure 2 12 2 10 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Installing and Removing the VSM Option File View Sample Sequence Measure Graph Instrument Utilities pr Section 2 2 Initial Installation of the Hardware and Software PE Simulation Mode Activate Option Configure Option Log PPMS Data Upload Send GPIB Commands Magnet
57. CAN status is operational normal Flashing CAN status is pre operational Verify that cable is connected to PC Red On or Error on the CAN bus Contact Quantum Design for flashing assistance If you are unable to achieve operation with both LEDs green please contact Quantum Design for assistance PPMS VSM Option User s Manual Rev A3 B 3 January 2008 Section B 3 Appendix B Model CM B Detection Module Front Panel Model CM B VSM Detection Module B 3 2 Connectors and Pinout Tables B 3 2 1 JB 1 MOTOR SYNC CONNECTOR This connector reads the motor encoder position from the Model CM A VSM motor module as a high speed digital serial signal A Ss JOG OOOO S Figure B 3 JB 1 Motor sync connector for the Model CM B VSM detection module Table B 3 JB 1 Motor sync connections for the Model CM B VSM detection module PIN FUNCTION Sync Data Clock PSync Ground Sync Data Clock O aolnNIT_ oI aftr wld PSync B 3 2 2 JB 2 MONITOR BNC This connector outputs the amplified pickup coil signal B 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix B Section B 3 Model CM B VSM Detection Module Model CM B Detection Module Front Panel B 3 2 3 JB 3 PREAMP CONNECTOR This connector is the main connection to the preamplifiers and coil
58. Capacity option after you first installed and used the VSM option Quantum Design PPMS VSM Option User s Manual Rev A3 4 5 January 2008 Section 4 3 Chapter 4 Installing a Sample Taking VSM Measurements 4 3 3 Install the Sample To install the sample you will use the VSM Install Remove Sample Wizard VSM Install wizard for short which has five pages of automated instructions that guide you through the sample installation process The overall process involves warming and venting the sample chamber moving the transport to the load position selecting the operating mode standard VSM or VSM Oven characterizing the sample designating a data storage file installing the sample and designating or scanning for the sample offset Note that this section covers the sample installation process only The sample removal process is covered in Section 4 5 1 Ifnecessary activate the VSM application see Section 4 3 2 and click on the Install tab to bring it to the front of the VSM Control Center Figure 4 4 2 In the Install tab of the VSM Control Center click on the Install Remove Sample button This button opens page 1 of the VSM Install Remove Sample Wizard dialog Figure 4 5 The VSM Control Center will still be open although it might be hidden behind the other panels Note the Chamber Status and Instruction areas in the dialog These areas inform you about the installation process and the next steps SM Install Remove Samp
59. DEACTIVATING THE VSM OPTION When you want to use a non VSM option e g the Heat Capacity option you will need to shut down the VSM deactivate the VSM software and remove the VSM linear motor transport see Chapter 2 Section 2 4 As a rule of thumb you also should deactivate the VSM when you will not be using it for an extended period e g a week or more The general removal sequence is outlined below including the instructions for deactivating the VSM option Important If you only need to deactivate the VSM application i e you will not be removing the VSM option follow the procedures in Step 2 only You do not need to deactivate the VSM when the system will be idle for brief periods less than a week 1 First prepare the system for deactivation according to the procedures in Chapter 2 Section 2 4 1 Prepare for Removal 2 Deactivate the VSM option Section 2 4 2 e Select Utilities gt gt Activate Option from the dropdown menu of the MultiVu window Figure 6 3 e When the Option Manager dialog opens select VSM and click on the Deactivate button The VSM option will move from the Active Options section of the dialog to the Available Options section The VSM Control Center and the VSM Log window will close but the MultiVu software application will remain open Continue with the VSM removal procedures that are presented in Sections 2 4 3 2 4 4 When they have been completed the base PPMS measurement system will be re
60. Error Handling Event Log Sigma Log PPMS Data 05 14 e aa Sl gt 0 e 2 Heliurn Fill Status Calculator EverCool gt Figure 2 12 PPMS MultiVu menu bar and Utilities dropdown menu with Activate Option selected The Option Manager dialog box Figure 2 13 will appear with a list of the Available Option Manager Available Options Active Options Options Activate gt gt Click on VSM under the lt lt Deactivate lt lt Deactivate Available Options heading Click on the Activate button eden J VSM will move to the Active Options area of the Option ao Manager Figure 2 13 Activating the VSM option with the Option Manager dialog box 7 Three events will occur as soon as you have activated the VSM option Quantum Design The VSM Log window and the VSM Control Center will open see Figure 2 14 In the control center you will see four panels or tabs Install Data File Sample and Advanced The Install tab is usually at the front when the control center opens When running in simulation mode the VSM Control Center is titled VSM SIM Note the Configure VSM System button under the Chamber Status area of the Install panel you will use this button to verify and test the coilset calibration in the next phase The VSM linear motor transport will perform a Home or homing operation During a homing operation the system finds the full range of travel for the transport
61. Handling Event Log O Sigma Log PPMS Data TIA Helium Fill Status Calculator EverCool Close Figure 6 3 Using the MultiVu dropdown Utilities menu and Option Manager to activate the VSM Option Quantum Design PPMS VSM Option User s Manual Rev A3 6 3 January 2008 Section 6 3 Chapter 6 MultiVu Software Application VSM Software When the Option Manager dialog opens select VSM and click on the Activate button This will move the VSM option from the Available Options section of the dialog to the Active Options section The VSM Control Center and the VSM Log window will open concurrently When running in simulation mode the VSM Control Center is titled VSM SIM see Figure 6 4 TES Mppms Multivu Simulation Mode y File View Sample Sequence Measure Graph Instrument Utilities Help SM SIM No Datafile lol x Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure VSM Sample System Status Measure Help VSM Ready Sequence Idle 296 40 K Stable 9025 0 De Persistent Seq lt none gt Set 304 10 K Set 41 0 0e E lt none gt 12 00 K min Fast Settle 100 0 Oe sec Linear Figure 6 4 The MultiVu window and the VSM Control Center VSM SIM including the Install tab the VSM Status area and the MultiVu Status bar Note that the VSM Log window has been minimized 6 3 2 2
62. In the MultiVu dropdown menus select File gt gt New Sequence to create a new sequence file or File gt gt Open to open and edit an existing sequence file Both commands open the sequence editor and the Sequence Commands bar Figure 7 11 shows the sequence editor with a new file and the Sequence Commands bar In the Sequence Commands bar click on the plus sign next to the Measurement Commands group The group name will expand into a list of commands and the VSM commands subgroup GENE MultiVu Sequence1 seq Simulation Mode File Edit View Sample Sequence Measure Graph Instrument Utilities Window Help Y Sequence1 seq Line Number 1 10 x Sequence Commands amp System Commands m Advanced Commands 8 Measurement Commands Log Ppms Data Override Cold Head Re enable Cold Head Sigma Log Ppms Data e VSM Center Sample Datafile Comment Measure Moment vs Field Moment vs Temp New Datafile Figure 7 11 Using the sequence editor and the Sequence Commands bar Click on the plus sign next to the VSM subgroup to expand it Select and double click on the Datafile Comment sequence command This command opens the same VSM Datafile Comment popup dialog box Figure 7 10 that opens when you select Measure gt gt VSM Datafile Comment from the MultiVu dropdown menu In the comment area enter your comment and click on the OK button The comment will appear in the sequence editor but
63. Manager dialog bOX cesses 4 5 Main MultiVu window and main window of the VSM Control Center VSM Log window has been minimized oooooocooccoconoconoonnnonononconn ccoo cconnoconecononos 4 5 The VSM Install Remove Sample Wizard dialog VSM Install wizard for short page I Opem Chamber nnen a a a 4 6 The VSM Install wizard page 1 Install or remove sample e cescesceeseeeeeeeeeees 4 6 The VSM Install wizard page 2 Selecting the standard low temperature VSM Option cccccesccesscessceseceeeceeeeeeseesseeeseecseeeaeenseeeseenaeens 4 7 The VSM Install wizard Cover the VSM head with the standard cap 0 e 4 7 The VSM Install wizard page 3 Designating an output data file eee 4 8 Using the VSM Select Data File dialog to open or create an output data file 4 8 Confirming creation of new data file ooonoconnconococnocnnoconocanonnconncnn cono nonnnononocnoconacnos 4 8 Creating a title for the data file o ooonnoninconoconococonaconnconononnnnononanonnnnonn cono nonn nono nccnnnnns 4 9 Describing sample properties cccccesccesscesscessceeeceeeeeeceeeseesseecseecseecsaeesecnaeenseenaeens 4 9 The VSM Install wizard page 3 Output data file name and sample properties 4 9 The VSM Install wizard page 4 Entering sample holder coordinates 4 10 Confirming sample offset Accept or reject scanned value eceeceeseeseeereeteeeee 4 10 The VSM Install wizard
64. NDEX 1 BOUT OS ASEE E E E EEE E EEE EE xi IEA EN xv x PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Contents Table of Figures o Figures Figure 1 1 Operating principle for the PPMS VSM option cocccncononincnoconoconnnonanonononnnncnncnn cinco 1 3 Figure 2 1 System components for PPMS VSM option ooooconccicccoconononnnnncnncnononccnnannnononnnccn conan 2 3 Figure 2 2 Temperature System dialog DOX oooconoconiconococonnnonnnoononancon nono nono nono nono nncnnn ran r narrar 2 5 Figure 2 3 Eieldidialog box aia is 2 5 Figure 2 4 Chamber dialo Doxa dada 2 6 Figure 2 5 Coilset puck 4096 204 with arrows to collset serial number and mounting ring ooooocnccccnoncnnconaconoconn nono nnnr oran rrnncrnn cnn 2 6 Figure 2 6 Installing the VSM coilset puck with the puck insertion tO0l oooncoicnicnnnnncincnm 2 6 Figure 2 7 VSM sample tube assembly 4096 301 cccccscsseesteceteceteceseeeseeeeeesseeeseeeseecaeeseees 2 7 Figure 2 8 Inserting the VSM sample tube into the sample chambet ccceccesceeceeseeeeeeeeees 2 7 Figure 2 9 Front and rear views of the VSM linear motor transport 4096 400 oc eee 2 8 Figure 2 10 Installing the VSM linear motor transport on the top flange of the PPMS 2 9 Figure 2 11 VSM option connections on a 9 T PPMS ccceeccesccsceeseeececeeseeeceaeeaeeeeeeaeeaeeeneeaes 2 10 Figure 2 12 PPMS MultiVu menu bar and Utilities dropdown menu with Act
65. Option ccecccecssecsseesseesseeseceseceeceecseeeeeseeeesesseeeseeeaeenaes 6 4 6 4 VSM Dropdown Menus au ia 6 5 CAM Vi O nt SO ir 6 5 64 2 Samples A SERE ESTES in 6 5 OAS Measure oneik A AA ETE EEE EE EEEE Re 6 6 6 5 VSM Control Center cccccccccssccssecsteceeceeceecseeeeeeeeeeeceseeeseecseecsaecsaecaecnseseseeseeseeeeeeeesaeesaees 6 8 6 5 1 VSM Control Center Components c cccccscccssecssecseecseceseceseceseceeeseeeseeeeeaeeeseeeeeetaeesaes 6 8 Oslo O EN TT 6 8 PA O E O ERE 6 8 OIL VSM Stats AT A A A cack teva dt 6 8 6 3 2 VSM Control Center Tabs cuina diia ie tica 6 9 03 2 Install Tab ic e e aane inet a e aAa 6 10 06 22 Data Tab ass 6 10 PAS Namnple Labi EE NO 6 12 6 524 Advanced Tab sorsero onna e ioe abone 6 12 Quantum Design PPMS VSM Option User s Manual Rev A3 vii January 2008 Contents Table of Contents 6 5 3 VSM Control Center Measure Button ecesceceeseeeeceeeeseeeeceaecaeeeecesecaeeeeeeaeenaeenees 6 13 6 5 3 1 VSM Measurement Dialog BUttODS ooonoocnocnnoonnocnnonnnonnnonnconnconncon nono nocnoconnnns 6 13 6 5 3 2 VSM Measurement Dialog Last Measurement oooooonnonionnnnnconnconncnnnoconocanoconocos 6 13 6 5 3 3 VSM Measurement Dialog Settings Tab 0 0 cccccceseceseceseceeeeeeeeeeeeeeeeeeneensees 6 13 6 5 3 4 VSM Measurement Dialog Centering Tab oooocoonncninnonincnonconnconnconnonnnocanonononns 6 14 6 5 3 5 VSM Measurement Dialog Advanced Tab oooocnnonnoninonnconoocno
66. QuantumDesign poang aa dl ataa Physical Property Measurement System Vibrating Sample Magnetometer VSM Option User s Manual Part Number 1096 100 A3 Quantum Design 6325 Lusk Boulevard San Diego CA 92121 USA Technical support 858 481 4400 800 289 6996 Fax 858 481 7410 Fourth edition of manual completed January 2008 Trademarks All product and company names appearing in this manual are trademarks or registered trademarks of their respective holders U S Patents 4 791 788 Method for Obtaining Improved Temperature Regulation When Using Liquid Helium Cooling 4 848 093 Apparatus and Method for Regulating Temperature in a Cryogenic Test Chamber 5 053 834 High Symmetry DC Squid System 5 110 034 Superconducting Bonds for Thin Film Devices 5 139 192 Superconducting Bonds for Thin Film Devices 5 311 125 Magnetic Property Characterization System Employing a Single Sensing Coil Arrangement to Measure AC Susceptibility and DC Moment of a Sample patent licensed from Lakeshore 5 319 307 Geometrically and Electrically Balanced DC Squid System Having a Pair of Intersecting Slits 5 647 228 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber Foreign Patents U K 9713380 5 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber Canada 2 089 181 High Symmetry DC Squid System Japan 2 533 428 High Symmetry DC Squid System Safety Instructions are inside Refer ser
67. S system temperature to ioix 300 K File View Sample Sequence Measure Graph Instrument Utilities Help pje u eo ajej a Chamber Temperature System xl Motion e Open the Temperature System dialog box select Instrument gt gt i Temperature and specify a State Sapte set point of 300 K as shown in Temp 14450 K Digital Output Fi gure 2 18 Current Drivers State Stable Bridge Channels Shutdown EverCool e Click on the Set button r Control e Leave the dialog box open so that you can monitor the pies Rate 12 00 K min temperature until it reaches at Mode Fast Sette least 290 K do not continue with installation until the sE temperature reaches at least 290 K Figure 2 18 Warming the system to 300 K with the 2 Inthe Temperature System dialog Temperature System dialog box box click on the Close button SetPoint 300 10 k 2 14 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Installing and Removing the VSM Option 3 Open the Field dialog box Figure 2 19 to set the field to zero 0 Oe e Select Instrument gt gt Field e Inthe Field dialog box specify a Set Point of zero 0 Oe e Click on the Set button e Leave the dialog box open so that you can monitor the field until it is within 1000 Oe of zero do not continue until the field is within 1000 Oe of zero 0
68. SM linear motor transport You can leave the other end of the cable connected to the Model 1000 modular control system Important Never attempt to move the linear motor transport when it has a cable connected to it 2 Remove the flange clamp from the top flange of the PPMS see Figure 2 10 Slowly lift the linear motor transport until 1t has cleared the stabilizer post see Figure 2 10 4 Place the linear motor transport back in the storage case 4096 150 WARNING Store the VSM linear motor transport in a secure location to prevent it from being attracted to magnetic fields in the laboratory including those produced by the PPMS as explained in Section 1 4 1 2 4 4 Remove the VSM Sample Tube and Coilset Puck 1 Remove the VSM sample tube 4096 301 from the PPMS sample chamber 2 Remove the VSM coilset puck 4096 204 from the sample chamber by using the puck extraction tool Refer to the Physical Property Measurement System Hardware Manual for a detailed description of puck insertion and extraction 3 Unplug the VSM preamp cable 3096 300 from the probe head and set it aside You do not need to disconnect the other end of the cable from the Model 1000 4 Return the blank flange to the top of the probe head or install another of the Quantum Design measurement options 5 When the sample chamber has been closed you can purge and seal it by using the Chamber dialog box Figure 2 20 e Select I
69. Spacing in Field Continuous Measuring mode refer to Section 6 5 3 3 for Uniform Spacing in Field 2 Uniform Spacing in Field 1 2 more information on Continuous Measuring When you are not using Continuous Measuring you must define when the VSM will take data by designating the field increment between measurements as is explained below Repetitions at z in Number of Fields Min to Max and Field Increment at o Uniform Spacing in Field sets the VSM to uniformly Ec space data collection with respect to the magnitude of the Figure 6 34 Data Acquisition magnetic field Data spacing selection o Uniform Spacing in Field 2 sets the VSM to uniformly space data collection with respect to the square of the magnitude of the magnetic field EIGANCIEMmEnN Ue o Uniform Spacing in Field 1 2 sets the VSM to uniformly space data collection with respect to the square root of the magnitude of the magnetic field o Uniform Spacing in 1 Field sets the VSM to uniformly space data collection with respect to the inverse of the magnitude of the magnetic field o Uniform Spacing in Log Field sets the VSM to uniformly space data collection with respect to the logarithm of the magnitude of the magnetic field 6 24 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software Averaging Time The Averaging Time text box Figure 6 35 allows you to set the Averaging Time fi sec length of time the VSM
70. Sync High Reset O0o fo x pop o pa fo fn 24 V DC Quantum Design PPMS VSM Option User s Manual Rev A3 B 7 January 2008 Glossary STANDARD TERM QD PART DEFINITION NUMBER Armature The moving section of the linear motor inside the head Auto scheduled An automated operating mode with the software carrying centering out centering operations after a certain amount of time has expired or the temperature or field has changed by a prescribed amount Bottom weldment flange ea Another name for the extender tube flange Cable slots The comb like structure at the rear of the Model 1000 designed to hold the exiting cables Calibration sample 4096 390 Palladium sample mounted in trough shaped sample holder proved in VSM User s Kit CAN computer interface 4100 100 CAN interface card cabling and software for PC kit communications with Model 1000 4096 429 The cap that covers the sample access port Centering operation This is the act of performing either a touchdown operation to measure touchdown position TP or a centering scan to measure center position CP the location of the sample The result is a center position CP which is the alternative to performing a touchdown operation Bearing grade plastic washers on sample rod Centering scan The act of oscillating the sample while scanning it slowly through the coilset The voltage versus position data is then fit to the e
71. TIMATED The Estimated area Figure 6 42 displays the estimated amount of time in hours and minutes that will be needed to complete the measurement as well as the estimated number of lines in the output data file The number of lines in the output data file is also the total number of data points that will be generated by your measurement For instance there will be 17887 lines of data in the example measurement in Figure 6 42 6 10 3 Sequence Mode VSM Moment versus Temperature Dialog Advanced Tab The options in the Advanced tab Figure 6 39 of the sequence mode VSM Moment versus Temperature dialog control how the VSM takes data during a measurement Experienced users will notice that many sections of this tab are identical in form and function to sections of the immediate mode VSM Measurement dialog 6 10 3 1 CENTERING SETTINGS Use the Centering subsection of the Advanced tab to set the conditions for the VSM to perform touchdown operations For more information on Centering see Section 6 5 3 4 6 10 3 2 RANGING SETTINGS Use the Ranging subsection of the Advanced tab to set the way the system chooses the gain of the amplifiers in the VSM module during measurement For more information on Ranging see Section 6 5 3 5 6 10 3 3 PPMS DATA LOGGING SETTINGS The Select button in the PPMS Data Logging subsection opens the PPMS dialog Figure 6 22 which provides additional system information that you can have sent to the output da
72. The Averaging Time value Figures 6 41 and 6 42 sets the length of time the VSM collects data before it is averaged into a measurement Section 6 5 3 3 has more information about Averaging Time Number of Temperatures and Temperature Increment When you select a uniform temperature spacing instead of Continuous Measuring you must define the spacing between the temperatures with the Number of Temperatures or Temperature Increment options Figure 6 41 o R e p et it io ns at eac h Te m p era t ure Temperature Controt Approx Temperatures sa fo 2 A The Repetitions at each Temperature End 1 3 K 205 value Figure 6 42 sets the number of data sl Kamin 233 32 points the VSM will take at each of the 239 88 i 299 85 temperatures shown in the Approx nP 20 Temperatures list This value will have no 2298 299 78 effect if you have also selected the Sweep Data custo 28877 or Continuous Measuring modes Continuous Measuing Il 20973 Keep Jes a ae The Keep dropdown menu bar see Figure 3 fo ls 6 42 is available when you have selected Repeltions ateach the Continuous Measurement option td ona which can generate large volumes of data o khs Lines 17887 Use the Keep options to choose the 80 of measurements percentage of data points that will be written to the data file See the Estimated The Number of Temperatures value sets the number of temperature set points at which VSM data will be taken This number of temp
73. V VSM board range setting M quad signal uu quadrature component of Moment uu field M raw emu moment with no image effect correction applied M raw emu quadrature component of above quantity Min temperature K minimum temperature reading of the coil thermometer for this measurement Max temperature K maximum temperature reading of the coil thermometer for this measurement Min field Oe minimum field reading of the coil thermometer for this measurement Max field Oe maximum field reading of the coil thermometer for this measurement Mass grams mass of transport as obtained from DC component of motor force Motor lag deg phase lag between motor drive current and motion Pressure torr pressure in sample chamber VSM status code status codes unique to the VSM module Motor status code status codes unique to the motor module Measure status code error condition codes of varying severity Zero indicates no errors PPMS status code PPMS standard data starts here System temp K PPMS block temperature System field Oe currently the same as the Magnetic Field Oe column Quantum Design PPMS VSM Option User s Manual Rev A3 7 5 Jnauary 2008 Section 7 3 Chapter 7 VSM Data Files VSM Architecture and Data Files 7 3 4 Creating a
74. VSM Measurement Data File There are several ways to create output data files with the MultiVu and VSM software applications As is explained in Steps 8 11 of Section 4 3 3 Install the Sample you will be prompted to designate create or select an output data file whenever you install a sample You can also use the Data File tab in the main window of the VSM Control Center to designate output data files as is summarized below see Chapter 6 Section 6 5 for more information on the Data File tab and creating data files 1 Inthe VSM Control Center click on the Data File tab to bring it forward Figure 7 6 SM SIM No Datafile ioj x Ux R Look in Dat ef Install Sample Advanced ia Ea El SE Heat Capacity Pait E AcmsDefault dat JE QdPpms Data History File Name UploadPpmsData dat ttgt dat new vsm3 dat E Desktop AN new vsmS dat new vsm4 dat heliumgr dat NEEEEEEEE My Documents My Computer A CEA Fie name new vem dat y My Network P Status Measure Help Files of type Data files dat Y Cancel NSM Ready 4 Fi 7 7 VSM Select Data File dial Figure 7 6 Data File tab of the VSM Control Center a Anos 2 In the Data File tab click on the Browse button to open the VSM Select Data File dialog Figure 7 7 3 Using the VSM Select Data File dialog create a or select b a file a If you create a new output data file the
75. VSM Measurement panels The Start and Pause buttons toggle change from Start to Stop and from Pause to Resume according to the process you initiated most recently The Close button closes the VSM Measurement dialog but it does not stop the measurements The Start and Pause buttons are explained in Section 4 4 3 4 4 2 Setting Up a Measurement You will set the main parameters for the VSM measurement by using the Measure Type and Measurement Parameters subsections of the Settings tab Figure 4 16 4 4 2 1 SETTINGS TAB 1 In the top left side of the Settings tab the Measure Type subsection has radio buttons to select Continuous Measuring or a Single Measurement Both measures are defined by the parameters that you set by using the Measurement Parameters subsection e Continuous Measuring takes measurements lasting Averaging Time If Logging Interval is less than Averaging Time a new measurement will occur every Averaging Time number of seconds Otherwise a new measurement will occur every Logging Interval number of seconds If you select Continuous Measuring the system will take measurements until you click on the Stop or Pause button e Single Measurement takes one measurement lasting Averaging Time 2 The Measurement Parameters subsection below the Measure Type subsection contains text boxes in which you enter the Duration and Interval of the measurements e Averaging Time is defined as the averaging time in seconds that you
76. VSM option is flexible enough to accommodate different detection coil configurations all sae COILSET SERIAL you will need to do is change the NUMBER REQUIRED coilset puck However for most AA uses the standard coilset puck Figure 5 3 Coilset puck 4096 204 provides the best trade off between sensitivity and accuracy The dimensions of the standard P coilset puck are shown schematically in Figure 5 4 The center of the gradiometer pick up Bm coils is located 40 1 mm 1 58 in H above the location corresponding to the puck surface This position corresponds to the center position of PPMS high field systems 14 T or greater and the high homogeneity region of lower field a COUNTER WOUND magnets e g 7 T 9 T O PICKUP COILS After repeated insertions of the i M I SAMPLE BORE VSM puck the contact fingers at A the base of the coilset above the serial number in Figure 5 3 might PUCK SURFACE bend inwards which would loosen the fit of the coilset in the bottom of the PPMS sample chamber When this happens you Figure 5 4 The internal dimensions of a standard coilset puck should make the coilset fit snugly are as follows Bore diameter B 6 33 mm coil thickness T again by using the puck 1 78 mm coil spacing S 7 11 mm coil inner diameter ID adjustment tool as described in 7 73 mm coil outer diameter OD 13 7 mm height above the Physical Property
77. Volume mm Shape Molecular Weight Figure 4 9A The VSM Install wizard page 3 Designating an output data file 9 To designate an output data file click on the Browse button in the top left hand side of the Install dialog The Browse button will open the VSM Select Data File dialog box Figure 4 9B 21x Look in Sj Data ek gt Heat Capacity Er 4 AcrnsDefault History 4 UploadPpmsData A fa heliumar G 4 ttat Desktop 4 vsmDefault E My Documents T My Computer ZAG E File name My Network P Files of type Data files dat Cancel ZA Figure 4 9B Using the VSM Select Data File dialog to open or create an output data file 10 Using the VSM Select Data File dialog create a file or select the name of an existing file then click on the Open button a Ifyou select the name of an existing data file new measurements will be appended to it The Open button will open the file you selected and it will return you to page 3 of the VSM Install wizard Figure 4 9F Please go to Step 11 below b If you create a new measurement data file a popup dialog will open Figure 4 9C indicating that you must enter the sample properties Click on the OK button contr x 2 New Datafile requires entry of sample properties pa aa Figure 4 9C Confirming creation of new data file 4 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Ch
78. ady for you to install a different option In this type of situation you also could put the PPMS in Shutdown standby mode which helps conserve helium while allowing the Model 6000 to monitor the system PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 Section 6 4 VSM Software VSM Dropdown Menus 6 4 VSM Dropdown Menus VSM specific actions dialogs and commands are incorporated into the View Sample and Measure dropdown menus in the MultiVu window after you have activated the option The other dropdown menus in the MultiVu window contain menu items that are common to all Quantum Design systems and are explained in the Physical Properties Measurement System PPMS MultiVu Application User s Manual 6 4 1 View You can use the View dropdown menu at the top of the MultiVu window Figure 6 5 to open VSM specific dialogs as well as to perform general actions such as opening and closing the MultiVu Status Bar the Sequence Control bar at the side of the window or the tool bar o To view the VSM Log select VSM Status Log see Section 7 2 3 1 o To view the current errors select VSM Error Count see Section 7 2 3 2 Merms Multi u Simulation Mode File View Sample Sequence Measure Graph Instrument Utilities Help Jae jej af delel 2i Sequence Control SM Status Log VSM Error Count Figure 6 5 The MultiVu window and the View dropdown menu showing VSM immediate mode comm
79. ained in Section 6 6 there are sequence mode versions of the immediate mode VSM Measure and VSM Center Sample commands However unlike immediate mode commands sequence mode commands are accessed through the Sequence Editor Once you have inserted sequence commands into a MultiVu sequence file they are automatically carried out executed when the sequence is run The VSM sequence commands can be combined with other non VSM sequence commands and looping constructs A general introduction to sequence commands and the construction of VSM measurement sequences is presented in Section 6 6 and Sections 6 7 6 10 explain the VSM specific sequence mode commands Refer to the Physical Properties Measurement System PPMS Multi Vu Application User s Manual for more detailed information about sequence commands 6 3 2 1 ACTIVATING THE VSM OPTION AND THE CONTROL CENTER 1 To activate the VSM application and open the VSM Control Center select Utilities gt gt Activate Option from the dropdown menu of the MultiVu window Figure 6 3 Ml ppms Multivu Simulation Mode lol x Fie View Sample Sequence Measure Graph Instrument Utilities Help Dla lol rael E T w lel Q Activate Option H o te elc paraa El 2 Configure Option Option Manager Log PPMS Data Available Options Active Options Upload ACMS Send GPIB Commands Heat Capacity Activate gt gt Magnet Helium3 7 Resistivit lt lt Deactivate Error
80. ake care that you place the New Datafile sequence command where it will be executed before the applicable measurement command When it is executed the New Datafile command instructs PPMS MultiVu to start saving data to the new file 1 If you will be appending data for a new sample to an existing file first use the steps below to verify that the properties of the original sample match those for the new sample If you will be creating a new data file go to Step 2 e In the Data File tab of the VSM Control Center Figure 7 6 click on the Browse button e When the VSM Select Data File dialog Figure 7 7 opens select the existing data file to which you want to append data and click on the Open button e Inthe VSM Control Center bring the Sample tab Figure 7 9 forward so that you can compare the properties of the data in the existing data file with the properties of the new sample If the two sets of sample properties do not match you should probably choose a different data file because you cannot change any of the property information that is already stored in the data file header e g sample material size shape 2 Using the MultiVu dropdown menu 21x select File gt gt Open gt gt Sequence Look in a Sequence 7 e e m The Select a Sequence File dialog will open Figure 7 12 J Example seq 3 Select the sequence file or create a new one and click on the Open button 4 The file will open along with t
81. all Remove Sample dialog page 3 Moving the transport into the shutdown positiOM oooooocnnnnnnonnocnnonnconnconnnonnnos 2 22 Figure 2 25B VSM Install Remove Sample dialog page 3 Transport shutdown o oo 2 22 Figure 3 1 Trough shaped sample holder 4096 378 ccsccssccesecessceesceeseeeeeeseeeeaeeeseeeeeeeeesaes 3 3 Figure 3 2 Paddle shaped sample holder 4096 372 ccccscecsseessecsseceteceseceeceeeeeeceeeeeeeeenseeeaes 3 4 Quantum Design PPMS VSM Option User s Manual Rev A3 xi January 2008 Contents Table of Figures Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9A Figure 4 9B Figure 4 9C Figure 4 9D Figure 4 9E Figure 4 9F Figure 4 10A Figure 4 10B Figure 4 10C Figure 4 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 4 15A Figure 4 15B Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21A Figure 4 21B Figure 4 22 Figure 4 23 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 xii The touchdown centering Operation ccccccccesscessceseceeeeeeeceeeeeeeeeeseeeseeeseeeneeesaeeasees 4 2 Reading the position of the sample from the sample mounting station 04 4 4 Activating the VSM option with the Option
82. alled and to keep the transport on the PPMS See Chapter 5 for more information on the sample tube INTEGRATED STABILIZER POST CENTERING RING SAMPLE TUBE BAFFLES O OO PROBE HEAD CENTERING 4 BAFFLE Figure 2 7 VSM sample tube assembly 4096 301 DEWAR A ee Figure 2 8 Inserting the VSM sample tube into the sample chamber Use the steps below to install the sample tube assembly 1 Quantum Design Verify that the standard centering ring has been removed from the top of the PPMS A VSM specific centering ring assembly has been integrated into the VSM sample tube assembly Important You cannot use a standard centering ring between the VSM linear motor transport and the PPMS As a safety mechanism the VSM system cannot be installed on the PPMS without the VSM specific components such as the VSM sample tube assembly with its integrated centering ring and stabilizer post Examine the O ring on the sample tube centering ring for dust or dirt If it is dirty clean it and lightly grease it with silicon vacuum grease Using Figure 2 8 as a guide carefully lower the sample tube assembly 4096 301 into the PPMS sample chamber until the VSM centering ring seats onto the top flange of the PPMS PPMS VSM Option User s Manual Rev A3 2 7 January 2008 Section 2 2 Chapter 2 Initial Installation of the Hardware and Software Installing and Remov
83. and 6 36 Quantum Design PPMS VSM Option User s Manual Rev A3 6 23 January 2008 Section 6 9 Chapter 6 Sequence Mode VSM Moment vs Field Command VSM Software Persistent at each field The Persistent at each field radio button sets the magnet to stabilize the field in Persistent mode at each field shown in the Approximate Fields list Figures 6 29 and 6 36 Sweep The Sweep radio button sets the magnet to continuously change the field without pause during the measurement When this setting is used the VSM will collect data at each field shown in the Approximate Fields list End Mode The End Mode dropdown menu bar allows you to set the state Persistent or Driven that the magnet will be in after the measurement has ended For more information about End Mode see Chapter 6 of the PPMS MultiVu Application User s Manual CAUTION Monitor the system closely when it is in Driven mode Use of Driven mode significantly increases heat flow into the dewar and the helium boil off rate so there is an increased risk of a magnet quench 6 9 2 3 DATA ACQUISITION SETTINGS Use the Data Acquisition section Figure 6 34 to set the basic parameters of the moment versus field measurements Data Spacing i The Data Spacing dropdown menu bar at the top of the section EA provides the following options Continuous Measuins z o Continuous Measuring sets the VSM to take data in Continuous Measuring a E A Uniform
84. ands 6 4 2 Sample You can use the Sample dropdown menu at the top of the MultiVu window Figure 6 6 to install and remove samples and to center the sample manually A PPMS Multivu Simulation Mode o xj File View Sample Sequence Measure Graph Instrument Utilities Help Figure 6 6 The MultiVu window and the Sample dropdown menu showing VSM immediate mode commands Important The Sample dropdown menu contains two install selections Install and VSM Install Remove You should always select VSM Install Remove when using the VSM The Install selection applies to the base PPMS system and is not appropriate for the VSM option o To install a sample designate an output data file and center the sample select Sample gt gt VSM Install Remove This selection opens the VSM Install Remove Sample Wizard Figure 6 7 which also organizes the installation and removal process when you use the VSM Control Center Section 6 5 Figure 6 12 to install a sample Quantum Design PPMS VSM Option User s Manual Rev A3 6 5 January 2008 Section 6 4 Chapter 6 VSM Dropdown Menus VSM Software Mirrms MultiVu Simulation Mode File View Sample Sequence Measure Graph Instrument Utilities Help Selected Se Install Sequence2 s RESTE Sequence St VSM Manual Locate Sequence Idle SM Install Remove Sample Wizard E x Chamber Status Pause 200 K Stable Sealed Abort Lock Instructions
85. ands bar will open concurrently as is shown in Figure 6 24 PUES MultiVu Sequence1 seq Simulation Mode aigi xi Fie Edit View Sample Sequence Measure Graph Instrument Utilities Window Help Oo ta oo ajaj S ale 2 JO Sequence Connands System Commands Line Number 1 Advanced Commands 8 Measurement Commands Log Ppms Data Override Cold Head Re enable Cold Head Sigma Log Ppms Data a VSM Adv Measure Center Sample Datafile Comment Moment vs Field Moment vs Temp New Datafile Figure 6 24 The MultiVu window the Sequence Editor and the Sequence Commands bar Using the Sequence Editor and Sequence Commands Bar Sequence files are constructed by inserting commands from the Sequence Commands bar into the file in the Sequence Editor window The Sequence Commands bar and Sequence Editor are shown in Figure 6 24 The Sequence Commands bar contains three major command groups System Advanced and Measurement The VSM specific measurement commands Adv Measure Center Sample Datafile Comment Moment vs Field Moment vs Temp and New Datafile are in the VSM subgroup within the main Measurement Commands group To see the commands in any group expand it by clicking on the plus sign next to the group heading To close a command group click on the minus sign next to the group heading Important The VSM option must be activated before the VSM sequence commands will appear in the Seque
86. apter 4 Section 4 3 Taking VSM Measurements Installing a Sample e The OK button will open the VSM x Datafile Title dialog Figure 4 9D so that you can provide a title for ii the graph view of the data Note Ce that this is optional e Enter the title you want displayed at the top of a plot or graph and click on the OK button OK Cancel Help Figure 4 9D Creating a title for the data file e The VSM Sample Properties dialog Figure 4 9E will open so that you can describe the sample for your records also optional SM Sample Properties x 2 Enter Sample Properties Material Titanium Comment Additional Descriptive Comments Mass m Size Poo Volume mm Shpe we OK Cancel Help Figure 4 9E Describing sample properties e When you have completed your description click on the OK button You will be returned to page 3 of the VSM Install wizard Figure 4 9F SM Install Remove Sample Wizard xj Dutput Data File Path C GdPpms Data Fle Name new vet dat Title Titanium 1 Material Titanium oxide Comment stock sample 1 Sample Informatiorr Mass 001 mg Size Volume mm Shape iregular Molecular lla Weight lt lt Back Next gt gt Cancel Figure 4 9F The VSM Install wizard page 3 Output data file name and sample properties 11 Page 3 of VSM Install wizard will now display any optional information that you entered
87. are and Software Installing and Removing the VSM Option 6 Remove any sample puck or PPMS x option that is installed in the Status r Control sample chamber Refer to the Physical Property Measurement Preccure OS Galore System Hardware Manual for instructions on removing a sample puck Refer to the appropriate PPMS option manual to remove an option Purge Seal Vent Seal Pump Cont Vent Cont Sensor Baratron State At Hac 7 Remove the standard centering ring or any other hardware that is present from the top flange of the PPMS Figure 2 4 Chamber dialog box 2 2 4 Install the Coilset Puck The coilset puck contains the VSM detection coils and a thermometer for monitoring the sample temperature You will insert the coilset puck into the sample chamber by using the standard PPMS puck insertion tool and the same procedures that are used to insert other types of pucks see the Physical Property Measurement System Hardware Manual for more information Install the puck before you insert the sample tube 1 On the PPMS verify that all items have been removed from the sample chamber opening including the standard centering ring 2 Locate the serial number of the detection coilset puck 4096 204 as shown in Figure 2 5 This serial number will be used to identify the calibration data for the coilset in a later step 3 Insert the coilset into the PPMS sample chamber by using the puck inserti
88. asurement Centering panel Figure 4 17 Quantum z EA Design staff strongly recommend that you OS k enable automatic centering by selecting Do a E Talos Touchdown Centering at Intervals See Section 4 2 1 2 for more about touchdown Delta Field 0 S Ela i Delta M t operations PE fo K Moment m Important If you select No Automatic Centering you must determine when C No Automatic Centering touchdowns are needed and you must erform them The Do Touchdown Cite at Intervals command assures EA ATA el SA measurement accuracy by informing the Figure 4 17 VSM Measurement dialog software about the location of the sample Centering tab Use the definitions below to determine how you set the Centering parameters You do not need to set the parameters if you disable automatic touchdowns by selecting No Automatic Centering Delta Time is the maximum allowed time interval in minutes between touchdown operations For example if it is set to 5 minutes and no manual or automatic centering operations have been performed within the past 5 minutes the system will automatically trigger a touchdown operation Use a value of zero 0 if the amount of elapsed time should never trigger a touchdown e Delta Field is the maximum allowed field change in oersted between touchdown operations For example if this is set to 10000 Oe and the field has changed by more than 10000 Oe without any manual or automatic centeri
89. ata file and Section 7 3 4 explains how to create VSM measurement data files Table 7 2 Definitions of column headers for VSM data files dat files shown in the order they appear COLUMN DEFINITION HEADER TERM Comment user specified comment added by using the Datafile Comment command Time stamp sec PPMS time stamp Temperature K average temperature T of the sample during measurements The sample temperature is measured by the coil thermometer Magnetic field Oe average magnetic field during measurement Moment uu average magnetic moment of the sample during measurement uu user units emu or A m M std err uu standard error i e the error of the mean for the measurement Transport action 1 measurement 2 auto touchdown 3 manual touchdown Averaging time sec number of cycles per measurement frequency as calculated Frequency Hz frequency of sample oscillation Peak amplitude mm peak amplitude A of oscillation such that position z t Asinot Center position mm average position of the transport over the measurement Coil signal mV uses known phasors for preamp and board to back out the actual voltage signal registered at the coilset in phase with the sample motion does not correct for the image effect Coil signal mV quadrature component of above quantity Range m
90. ation and Mounting Mounting Samples Table 3 2 Calculated ratio of the reported moment to the true moment of cylindrical samples for different radial offsets from the coilset centerline PEAK SAMPLE AMPLITUDE DIMENSIONS SAMPLE FADAL OFESET A mm L mm D mm 0 mm 0 5 mm 1 0 mm 1 5 mm 2 0 mm 1 0 1 0 1 0 1 000 1 001 1 003 1 003 0 997 1 0 2 0 2 0 1 000 1 001 1 003 1 005 1 000 1 0 3 0 3 0 1 001 1 003 1 006 1 009 1 006 2 0 1 0 1 0 1 000 1 002 1 010 1 020 1 028 2 0 2 0 2 0 0 999 1 002 1 010 1 020 1 030 2 0 3 0 3 0 0 998 1 001 1 010 1 023 1 035 3 2 3 Size of Magnetic Moment The magnetic moment of your samples should be larger than about 10 emu to be detected in the VSM 3 3 Mounting Samples 3 3 1 Sample Holder Construction Most sample holders are constructed of materials with magnetic moments that are much larger than the minimum detectable moment The key to successful measurements is making the sample holder relatively uniform Figure 3 1 shows the geometry of the trough shaped sample holder included in the VSM Option User s Kit As you can see the cross section is shaped like a C to hold the sample In addition the cross section shows that the sample holder is uniform in the region where the sample is mounted As a result small vertical displacements of the sample holder will not create a signal However if the ends of the sample holder move s
91. aximum Moment f 0 46875 emu Figure 6 39 Advanced tab of the sequence mode VSM Moment versus Temperature dialog 6 10 2 Sequence Mode VSM Moment versus Temperature Dialog Setup Tab The Setup tab Figure 6 38 has subsections for Temperature Control and Data Acquisition A scroll bar at the right side automatically displays Approx Temperatures that are based on the other settings The subsections and their settings are explained below SM Moment versus Temperatu Setup Advanced 6 10 2 1 TEMPERATURE CONTROL Tia SS SETTINGS me rt 300 E Use the options in the Temperature Control End j s K subsection Figure 6 40 of the Moment versus l Temperature dialog box to set the general Sweep Rate fid as parameters of a moment versus temperature A measurement Sweep Continuously Figure 6 40 Temperature Control section of the sequence mode VSM Moment versus Temperature dialog 6 28 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software Section 6 10 Sequence Mode VSM Moment vs Temp Command Start and End The Start value sets the temperature in degrees Kelvin at which the measurement will start during a temperature sweep The initial temperature can be larger or smaller than the final temperature so you can collect data while the sample is being warmed or cooled The End value sets the temperature in degrees Kelvin at which the moment v
92. cal samples and different amplitudes ccesesceeceeeeseeeeceeeeeeeeeeeaeens 3 2 Table 3 2 Calculated ratio of the reported moment to the true moment of cylindrical samples for different radial offsets from the coilset centerline 3 3 Table 5 1 Sample Connection with User Bridge Cable Connected coooooccoconccnocincnocccoccncnonncnnonos 5 5 Table 6 1 VSM warning and error messages ocococnoonnoonnnonononnnnnnonnnco nono noc n aran r ron nn rr nn rrnn rra 6 9 Table 7 1 Software files required to operate the VSM Option oooonoocccoccnonononononconnononononocanocnonos 7 2 Table 7 2 Definitions of column headers for VSM data files dat files 0 0 0 eeceeseeseeereeees 7 5 Table A 1 Electrical specifications for Model CM A VSM motor module eeeeseeeeee A 3 Table A 2 LED guide for Model CM A VSM motor module 00 0 0 cccecceeceseeeeeeeceecneeeneeneeaee A 3 Table A 3 JA 1 Servo connector for the Model CM A VSM motor module eects A 4 Table A 4 JA 3 Motor sync connector for the Model CM A VSM motor module A 5 Table A 5 JA 4 Aux connector for the Model CM A VSM motor module cceeeeeeeeeee A 6 Table A 6 QD CAN connector on the rear of the Model CM A VSM motor module A 8 Table B 1 Electrical specifications for the Model CM B VSM detection module B 3 Table B 2 LED guide for the Model CM B VSM detection module ooococncncnnnincnnnncicncnnccnos B 3 Table B
93. care before opening any of the electronics units including turning off the equipment and disconnecting it from its power source Ke Turn off and unplug all electronic equipment before removing any equipment covers Ke Y Keep electrical cords in good working condition and replace frayed and damaged cords ae Keep liquids away from the workstations 1 4 4 Lifting and Handling The VSM linear motor transport 4096 400 should be handled with care as it is very heavy about 10 kg or 22 Ib and could cause crushing injuries 1 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 1 Section 1 5 Introduction to the VSM Option Contacting Ouantum Design 1 5 Contacting Quantum Design If you have trouble with your VSM or your PPMS please contact your local Quantum Design service representative for assistance Your service representative will ask you to describe the problem the circumstances involved and the recent history of your system United States Quantum Design World Headquarters 6325 Lusk Boulevard San Diego CA 92121 Tel 1 858 481 4400 1 800 289 6996 Fax 1 858 481 7410 Email service qdusa com Web _ http www qdusa com Service for Canada Mexico the United States and other countries not listed below Europe L O T Gmbh amp Co KG Im Tiefen See 58 D 64293 Darmstadt Germany Tel 49 6151 880631 Fax 49 6151 896667 Email gd euroservice
94. ccceeee 2 21 4 18 VSM Sample Properties 4 9 7 6 VSM Select Data File 4 8 6 10 6 11 7 6 7 8 drive coil See VSM linear motor transport head E Error Count rai did 6 5 7 3 error message 6 3 6 9 7 2 7 3 A 3 B 3 errors recovering TOM oocoocococcccccnccccincannnoos 6 9 Excitation Parameters 4 15 6 15 6 16 6 21 6 22 6 26 6 28 6 32 extended purge recommendation 4 11 extender tube flange See VSM linear motor transport head F field magnetic See magnetic field Field dialog ccccccsseesecteeeeeees 2 5 2 15 flange clamp 2 8 2 9 2 16 2 23 flexible coupling See magnetic lock Frequency AA 4 15 6 15 6 16 Index 2 PPMS VSM Option User s Manual Rev A3 G guide pin alignment pin See module bays H head See VSM linear motor transport head Home homing operation 2 11 4 5 I immediate mode commands 4 3 6 3 6 6 6 8 indicator pin See VSM linear motor transport head initial installation See installation initial Install dialog sample See Install Remove Sample Wizard EI A 4 4 4 6 6 10 install sample See also Install Remove Sample Wizard 8 4 4 4 12 Install Remove Sample Wizard 2 19 2 22 4 6 4 12 4 17 4 19 6 5 6 6 6 10 installation VSM option Mita 2 1 2 13 re installation cccccccceeeeeeeeees 2 14 2 18 Interval Se
95. citly executing the Center Sample command you reset the beginning of the interval Quantum Design PPMS VSM Option User s Manual Rev A3 6 21 January 2008 Section 6 9 Chapter 6 Sequence Mode VSM Moment vs Field Command VSM Software 6 9 Sequence Mode VSM Moment vs Field Command The sequence mode VSM Moment vs Field command facilitates using sequences to make common VSM measurements such as hysteresis loops This command allows you to rapidly set the VSM to take data while sweeping the field in a variety of different patterns and it gives you the ability to control the spacing of the data points e g uniform spacing in Log Field 1 Field etc so that it is easy to plot the data When you click on the sequence mode Moment vs Field command in the Sequence Commands bar it opens the sequence mode VSM Moment versus Field dialog shown in Figure 6 29 6 9 1 Sequence Mode VSM Moment versus Field Dialog The VSM Moment versus Field dialog has two tabs Setup Figure 6 29 and Advanced Figure 6 30 with options for setting measurement parameters As is explained below the tabs provide several unique functions as well as some of the same functions found in the sequence mode Scan Field and VSM Adv Measure commands You can insert the Moment vs Field command at any time by clicking on the OK button at the bottom of the dialog The Cancel button closes the dialog and does not insert the command or save any changes you ha
96. click on the Resume Pause button 4 To stop data output and sample oscillation click on the Stop Start button 4 16 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 5 Taking VSM Measurements Removing a Sample 4 5 Removing a Sample You will use the VSM Install Remove Sample Wizard to remove the sample and sample rod The process is the same as that for installing a sample through Step 3 see Section 4 3 3 If you will temporarily stop taking measurements e g a week or more you can remove the sample rod cover the linear motor transport shut down the transport and end the VSM Install wizard Important If you want to stop taking VSM measurements and start taking measurements with a non VSM option you will need to remove the VSM related hardware and reconfigure the PPMS by using the procedures that are outlined in Section 2 4 The reconfiguration process requires steps that are not needed for the basic sample removal process outlined here 1 Start the VSM Install Remove Sample Wizard VSM Install wizard for short In the Install tab of the VSM Control Center e g Figure 4 4 click on the Install Remove Sample button 2 When page 1 of the VSM Install wizard opens Figure 4 20 click on the Open Chamber button underneath the Instructions area The wizard will warm the sample chamber to 305 K vent the chamber and move the transport to the load or unload position SM Install
97. contacting any magnetic object Important Keep the magnet surfaces clean as the strength of the lock depends on the magnets being flush in contact with the mating part in the linear motor transport Also avoid bringing the magnets into contact with magnetic objects Although small the magnets are extremely strong 5 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 5 VSM Hardware Section 5 3 VSM Option User s Kit Flexible Coupling The flexible coupling is made of Delrin and relieves excess transverse bending stress and mechanical coupling that might arise in the rigid shaft from slight non axial alignment Stiff Tapered Shaft The stiff tapered shaft is the main shaft of the sample rod It is made from wound carbon fiber composite that is lightweight and stiff Centering Slides The centering slides slide through precision guide tubes within the sample tube and are precisely fitted to prevent rattling These slides are integrated into the shaft and the lower slide adapter and are designed to be low friction and to have a long life so long as you keep them clean and smooth Important The centering slides must be kept clean and smooth Flexible Thin Shaft The flexible thin shaft is carbon fiber and forms a flexible coupling between the two centering slides It is designed to relieve excess contact force between the centering slides and the guide tubes Lower Slide Adapter The lower slide ada
98. coupling constant m is the DC magnetic moment of the sample A is the amplitude of oscillation and fis the frequency of oscillation The acquisition of magnetic moment measurements involves measuring the coefficient of the sinusoidal voltage response from the detection coil Figure 1 1 illustrates how this is done with the PPMS VSM option 1 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 1 Section 1 3 Introduction to the VSM Option Theory of Operation MOTOR DRIVE CURRENT VSM DRIVEN SAMPLE ROD LI 4096 352 F ENCODER POSITION SAMPLE COILSET VOLTAGE Vea eee PICK UP COILS Figure 1 1 Operating principle for the PPMS VSM option The sample is attached to the end of a sample rod that is driven sinusoidally The center of oscillation is positioned at the vertical center of a gradiometer pickup coil The precise position and amplitude of oscillation is controlled from the VSM motor module using an optical linear encoder signal readback from the VSM linear motor transport The voltage induced in the pickup coil is amplified and lock in detected in the VSM detection module The VSM detection module uses the position encoder signal as a reference for the synchronous detection This encoder signal is obtained from the VSM motor module which i
99. csecscssecscssessssscscssssscssssscsssssessesoees 3 1 A E RR 3 1 32 Sample O 81S AAE a T Waeanes 3 1 ES IS SE A E 3 1 3 2 2 Errors from Radial Offset of Sample oo cc cccccsseesseesteceteceeceeeeeeeseeeeseecseecaecsaeenseeeaeens 3 2 3 2 3 Size of Magnetic Moment ccccccecssecssecssecssecesecesecesecsseeseecseeeseseeeseeeseecseecsaecnseeeaeeeaeees 3 3 3 3 Mounting Samples indicated E E E LAI aiii 3 3 3 3 1 Sample Holder Construction ccccccccsceesseesseceeeceeceeeceeeceeecseeeeeeeeeseeeseeceeesaeesseeneeeaeees 3 3 3 3 2 Accurate Sample Location ccccccecssecssecsseceeceeceseceseceseceeeeseeeeeseesaeeeaeecseecsaecsseeneeeaeens 3 4 3 3 3 Sample Holder Variations nenita iia 3 4 CHAPTER 4 Taking VSM Measurements ci Leonidas 4 1 AVS Introd ctons sees secs sxaedsseeeleesee cases se iacds a hs 08d cues pdseuasab ook E A e SS 4 4 2 Overview of VSM Measurement ccescsscceeeseeeecesesseesecsecaeeeceeseesecaaeeaeesecsaesaeeeeeaecaeeeneeass 4 1 4 2 1 Sample Centerin ia A ta 4 1 4 2 1 1 The Touchdown Operation cccccccccsccsscessseeseeescecseecssecsseceeceseceseeeeeeeeeeeeeeeseeaees 4 2 4 2 1 2 Scheduling Touchdown Operations ccccccecscesseeesseeneeeeeeeeeeecseecneeneeneenaeens 4 2 4 2 2 VSM Measurement Process Synchronous Detection oooooonocnnonnnonononcnnnconnconcccnoconocnonos 4 3 4 2 3 Immediate Mode and Sequence Mode cccccssccsssceseceseceseceseceeeeeeeeeseecseecseecsaeenseenseenaeens 4 3 4
100. ction B 3 Model CM B Detection Module Front Panel Specifications Table B 1 Electrical specifications for the Model CM B VSM detection module Input Ranges from preamp 5 V 0 5 V 50 mV 5mV Thermometer Current Ranges 0 02 mA 0 5 mA Thermometer Voltage Range 10 mV Thermometer Sample Rate 14 Hz 20 to 200 000 ohms Thermometer Resistance Range Supply Voltage 24 V DC Model CM B Detection Module Front Panel Indicator LEDs The front panel of the Model CM B detection module has two LEDs in the top left as shown in Figure B 1 The PWR LED indicates the power on status of the module The COP CANopen Protocol LED indicates the status of the CAN network controller Table B 2 outlines the LED states and provides solutions in the event of a problem Important The error information in Table B 2 refers to situations that persist for longer than about 15 seconds Typically when the module is powered on the LEDs briefly flash red before they turn green This is a normal part of the startup or reset sequence Table B 2 LED guide for the Model CM B VSM detection module LED COLOR STATUS MEANING AND OR SOLUTION PWR Green On The processor is running with no errors normal Red Flashing Errors were encountered during the self test The flashing sequence can be used to determine the cause of the failure COP Green On
101. d linear motor transport calibration ROM via the motor drive cable 3096 200 The sample rod is held in place in the VSM linear motor transport by a magnetic locking mechanism consisting of small magnets in the top of the rod the magnets stick to a thin steel ring at the top of the armature A spring suspension mechanism inside the linear motor transport isolates the vertical motion of the motor from the housing during vibration The resonant frequency of the spring suspension mechanism is about 5 Hz You can verify whether the suspension mechanism is functioning Quantum Design PPMS VSM Option User s Manual Rev A3 5 1 January 2008 Section 5 2 Chapter 5 VSM Hardware Components VSM Hardware correctly by gently tapping the top of the sample rod at the sample access port during sample loading A mechanism that is working correctly will oscillate for at least 5 seconds The transport is shipped from the factory with the shipping plug installed to prevent oscillation of the motor suspension mechanism Before using the equipment you must remove the shipping plug and install the extender tube flange A window in the front side of the linear motor transport opposite the electrical connector displays the location of the armature the moving section of the motor transport When you are installing or removing samples you will be able to see an indicator pin at the top of the window The indicator pin will be at the top of the window when the
102. d the linear motor transport onto the post even though the stabilizer post helps prevent the linear motor transport from tipping over Quantum Design PPMS VSM Option User s Manual Rev A3 5 5 January 2008 Section 5 2 Chapter 5 VSM Hardware Components VSM Hardware INTEGRATED CENTERING RING STABILIZER POS ENTERINC BAFFLE Figure 5 5 VSM sample tube 4096 301 5 2 5 Sample Rod The VSM sample rod is specifically designed for the VSM option and is not compatible with the ACMS option of the Quantum Design PPMS Many of the design features of the sample rod were introduced to reduce the background signal from mechanical vibrations at the VSM oscillation frequency Such features control the rattling or friction between the rod and the PPMS and they eliminate resonant flexure of the shaft MAGNETIC LOCK CENTERING SLIDES FLEXIBLE COUPLING STIFF TAPERED CARBONSEIBER FLEXIBLE THIN LOWER SLIDE SHAFT CARBON FIBER ADAPTER SHAFT Figure 5 6 VSM sample rod 4096 352 Figure 5 6 shows the sample rod in a horizontal position during use the magnetic lock would be at the top of the rod Beginning at the far left of the figure the sample rod consists of the following components o Magnetic Lock The magnetic lock is constructed of aluminum The lock contains six small very strong magnets that attach the sample rod to the armature in the linear motor transport during a measurement Keep the magnets clean and prevent them from
103. ded to this file 7 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 7 VSM Architecture and Data Files 7 3 5 Adding a Comment to a VSM Measurement Data File Section 7 3 VSM Data Files You can append a comment to a VSM measurement data file For example you can record information about the experiment e g changes in operations or anything else that might be helpful to those who read the data file These comments can be appended immediately or they can be included in a sequence so that they are appended to the data file when the sequence is run Important A comment is a character string of unlimited length Do not use quotation marks in comments 7 3 5 1 APPEND IMMEDIATELY To append a comment to the data file immediately select Measure gt gt VSM Datafile Comment from the MultiVu dropdown menu A small pop up dialog VSM Datafile Comment Figure 7 10 will open Enter your comment in the text box and click on the OK button SM Datafile Comment xx Enter a comment to be appended to the current datafile a Cancel Help Figure 7 10 Dialog for appending a comment to a file now or in the future Important A comment is a character string of unlimited length Do not use quotation marks in comments 7 3 5 2 APPEND IN THE FUTURE To append a comment to the data file at the time when a sequence is executed use the sequence commands 1 Quantum Design
104. dents from causing injury or serious equipment damage If you use the equipment in a manner that is not specified by Quantum Design the protection afforded by the equipment may be impaired 1 4 1 Magnets WARNING Any person who wears a pacemaker electrical medical device or metallic implant must stay at least 5 m 16 5 ft from the PPMS dewar In addition personnel should keep all ferromagnetic objects at least 5 m 16 5 ft from the PPMS dewar Verify that all magnetic fields are at zero 0 before you handle the VSM linear motor transport in any way The following precautions should be followed to ensure the safety of personnel who work with or around a PPMS with a superconducting magnet This material is covered in more depth in Chapter 1 of the Physical Property Measurement System Hardware Manual Y Verify that any person who has a metallic implant or is wearing a pacemaker or electrical or mechanical medical device stays at least 5 m 16 5 ft from the PPMS dewar Large magnetic fields are dangerous to anyone who has a metallic implant or is wearing a pacemaker or other electrical or mechanical medical device At the current time August 2004 5 m should be a large enough distance to protect wearers of metallic implants or medical devices from most magnetic fields produced by Quantum Design magnets However the safe distance from newer magnets in development could be greater Hence personne
105. down is performed 4 2 2 VSM Measurement Process Synchronous Detection To perform VSM measurements the Model CM A VSM motor module is programmed to oscillate the sample at the center of the coilset at a predetermined frequency and amplitude The voltage induced in the coilset is then amplified by the preamp and detected by the Model CM B VSM detection module The VSM detection module also reads the real time sample position from the motor module The VSM detection module uses both the position and voltage signals to generate a complete and independent magnetization measurement every cycle of oscillation In principle a 40 Hz oscillation frequency can produce a 40 Hz data rate from the module These data are averaged over an amount of time that you specify For example if you specify an averaging time of second and the oscillation frequency is 40 Hz the detection module would average the 40 readings per second into one reading per second To obtain an accurate measurement of the magnetic moment the VSM software application uses calibration data from calibration files on the PC and from ROMs in the modules The calibration data includes corrections for preamplifier gain errors phase shift errors and the geometry of the coilset puck 4 2 3 Immediate Mode and Sequence Mode VSM measurement commands including starting stopping and centering can be carried out in immediate mode or sequence mode Immediate mode corresponds to commands t
106. e control center opens it shows four tabs or dialog panels with the Install tab in the front as shown in Figure 2 21 When running in simulation mode the VSM Control Center is titled VSM SIM Chapter 6 contains a detailed description of the VSM Control Center Quantum Design PPMS VSM Option User s Manual Rev A3 2 17 January 2008 Section 2 3 Chapter 2 Reconfiguring the PPMS for the VSM Option Installing and Removing the VSM Option YSM SIM No Datafile 215 x Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure SM Sample System Status Measure Help WSM Ready Figure 2 21 VSM Control Center VSM SIM and the Install tab Next you will verify the serial number on the detection coilset puck 2 3 6 Configure the VSM System The serial number of the detection coilset puck identifies the calibration file that is used to calibrate the coilset You must verify that the serial number on the puck Step 1 of Section 2 3 2 matches the standard calibration file referenced in the software You will use the Configure VSM System dialogs to specify the puck serial number and test the VSM hardware 1 2 2 18 Locate the serial number that you obtained in Section 2 3 2 Click on the Configure VSM System button which is located on the right side of the Install tab Figure 2 21 Page 1 of the Configure VSM System dialog will open Figure
107. e 6 11 enter your comment in the text box For a complete explanation of how to add comments to files see Section 7 3 5 SM Center Sample M ix SM Datafile Comment E ol xi Press Center to perform tourchdown operation Text to Append to center sample in coilset PEE A Figure 6 11 The immediate mode VSM Datafile Comment popup Center Sample popup PPMS VSM Option User s Manual Rev A3 6 7 January 2008 Section 6 5 Chapter 6 VSM Control Center VSM Software 6 5 VSM Control Center The VSM Control Center opens within the MultiVu window as soon as you activate the VSM option and application software Figure 6 12 shows the VSM Control Center and the commands dialogs tabs buttons and software prompts that organize measurement related activities making it easy for you to perform basic operations e g create data files install samples and set up and initiate immediate mode measurements 6 5 1 VSM Control Center Components 6 5 1 1 TABS The VSM Control Center contains four panels or tabs that offer options for setting up your measurements Install Section 6 5 2 1 Data File Section 6 5 2 2 Sample Section 6 5 2 3 and Advanced Section 6 5 2 4 SM SIM No Datafile iol xj Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure SM Sample System Status Measure Help VSM Ready Figure 6 12 The VSM Control Cen
108. e Logging Interval L Last Measurement panel 4 12 4 13 6 13 load position See VSM linear motor transport head Logging Interval 4 13 4 14 6 13 6 14 6 20 M magnetic field 6 2 6 13 6 14 6 22 6 27 setting to Zero ssns 2 4 2 15 2 19 WAINING neeese 2 5 2 8 2 15 2 21 2 23 magnetic lock 4 7 5 1 5 6 G 2 flexible coupling 0 0 0 ee ceeeeeeeeteeeeeeeteeeeeeaes 5 6 magnetic lock ring 2 8 4 7 5 1 5 2 G 2 Measure cc00 4 12 6 6 6 8 6 13 SEQUENCE MOE cooccccococccccncccncnnnnnnns 6 19 6 21 Measure Type 4 13 6 13 measurement data file See data file Measurement Parameters 4 13 4 14 6 13 6 14 measurement theory 1 2 1 3 4 3 A 1 B 1 Model 1000 modular control system 1 2 2 2 2 4 5 11 A 1 B 1 G 2 Quantum Design January 2008 Model CM A seee 1 2 1 3 2 2 2 4 4 3 5 1 5 9 5 11 A 1 A 8 G 2 Model CM B 0 1 2 1 3 2 2 2 4 4 3 5 8 5 11 A 1 B 1 B 7 G 3 G 4 module bays See also Model 1000 modular control SYStOM oocococccccocococcccncciccncnns 2 4 G 2 alignMent Pi oaran iar A A G 2 COVES platei frana aiea iaa 2 4 G 1 guide PINS cursis G 2 moment magnetic 1 2 3 1 3 3 4 3 4 13 4 15 6 13 6 15 6 16 6 18 6 22 6 32 Moment versus Field 6 22 6 27 Moment versus Temperature 6 27 6 32 motor module See Model CM A VSM motor module mo
109. e VSM Change Datafile dialog use the radio buttons to specify where data will be sent to a new file or appended to an existing one Use the Browse button to designate select or create a measurement data file see Section 7 3 4 for instructions When you have completed your specifications click on the OK button The VSM Change Datafile dialog box will close and the New Datafile command will be inserted into the sequence file PPMS VSM Option User s Manual Rev A3 7 9 Jnauary 2008 A PPENDIX A Model CM A VSM Motor Module A l Introduction This appendix contains the following information o Section A 2 provides a functional overview o Section A 4 describes the back panel and of the Model CM A VSM motor module relevant components of the Model CM A including a block diagram and electrical VSM motor module specifications o Section A 3 describes the front panel and relevant components of the Model CM A VSM motor module A 2 Functional Overview The Model CM A 4101 100 is a servomotor controller module that was designed with the specific needs of the VSM head in mind Figure A 1 shows the module and the front panel The principle function of this module is to provide closed loop servo control to a linear motor equipped with a position encoder output A programmed wave table allows the module to drive the motor sinusoidally at 40 Hz The servo loop is closed digitally at about 2000 Hz using a 16 bit current source and the
110. e the MultiVu or VSM software to change it after the file has been created You can view the sample information in an active output file by clicking on the Sample tab of the VSM Control Center Section 6 5 2 3 YSM Sample Properties Q Enter Sample Properties Material Titanium oxide Comment stock sample 1 Additional Descriptive Comments 001 mg Size Volume mm Shape iregular Mass Molecular Weight OK y Figure 6 16 Recording sample properties PPMS VSM Option User s Manual Rev A3 6 11 January 2008 Section 6 5 Chapter 6 VSM Control Center VSM Software 6 5 2 3 SAMPLE TAB The Sample tab Figure 6 17 is a read only status display that shows the sample properties e g material comments mass and volume for the active output data file The information in the Sample tab originates from your entries in the VSM Sample Properties dialog which are stored in the header of the output data file If you select a pre existing file to which you want data appended and bring the Sample tab forward the information in the Sample dialog will reflect the entries in the header of the pre existing file SM SIM new vsm1 dat loj x Install Data File Sample Advanced Titanium oxide Material Comment stock sample 1 Additional Descriptive Comments Mass 001 mg Size Volume mm Shape iregular a Weight Status Measure Help VSM Ready F
111. ea at the bottom of the VSM Control Center e g Figure 7 6 The log captures high level hardware and software activity during VSM measurements as well as test results from checks of the system hardware The VSM Log or status log also captures warnings errors and informational messages that have been Mox Vibrating Sample Magnetometer Initializing 7 17 2003 10 02 42 AM Resetting CAN controller board Initializing Motor module Module name Quantum Design VSM Linear Motor Servo Controller HW Version 3101 100 40 SW Version 01 00 03 Initializing VSM module Module name VSM HW Version 3101 150 41 SW Version 00 98 01 Jul 16 2003 19 50 57 Homing Motor Initializing coil thermometer VSM Ready Figure 7 1 Example of a VSM Log Mppms Multivu Simulation Mode File View Sample Sequence Measure Graph Instrument Ut EN Status Bar v Tool Bar Sequence Control VSM Status Log VSM Error Count El u uje 2 Figure 7 2 Opening the VSM Log window generated since the last time the VSM option was activated Hence the VSM Log is a status log that frees you for other activities during a sequence run or hardware test Using this record you can check for important information about your measurements and potential equipment problems The information in the status log is also written to the VSMLog txt file This file contains a record of all VSM sessions while the VSM Log window only displays the re
112. ead 4096 400 4096 400 4096 400 The linear transport motor used with the VSM linear The linear transport motor used with the VSM motor used with the VSM High power bay A module bay with a single guide pin designed to accommodate a QD module that dissipates up to 50 W Three of these slots are located on the back row of the Model 1000 High power bays have more airflow than low power bays Indicator pin Attached to the armature The location of the indicator pin shows the vertical position of the armature in the window at the front of the linear motor transport Load position When the indicator pin is at top of the window at the front of the linear motor transport the user has access to the magnetic lock Lower Lower slide adapter Lower slide adapter 4096 368 368 Lower end of Lower end of sample rod threaded to attach sample holder rod Lower end of sample rod threaded to attach sample holder to attach sample holder Low power bay A module bay with two guide pins designed to accommodate a QD module that dissipates up to 20 W Three of these slots are located on the front row of the Model 1000 High power bays have more airflow than low power bays AE lock ua 358 Located at upper end of sample rod uses magnets to a Ee sample rod to transport sl lock ring Thin steel ring at the top of the armature that holds the sample rod magnetically Manual centering User initiated touchdown operation
113. ear protective clothing and ensure that the room has good ventilation when you work with cryogenic materials such as liquid helium and liquid nitrogen These precautions will protect you against cryogenic material hazards 1 they can expand explosively when exposed to room temperature 2 they can cause serious burns Y e Quantum Design Always wear protective clothing including thermal gloves eye protection and covered shoes when you work with liquid helium liquid nitrogen or other cryogens Avoid loose clothing or loose fitting gloves that could collect cryogenic liquids next to the skin The extreme cold of liquid and gaseous cryogens can cause serious burns and has the potential to cause loss of limbs Work with cryogenic materials in well ventilated areas only In the event a helium container ruptures or there is a helium spill vent the room immediately and evacuate all personnel In a poorly ventilated area helium can displace the air leading to asphyxiation Because helium rises well vented rooms with high ceilings generally provide the safest setting for working with helium PPMS VSM Option User s Manual Rev A3 1 5 January 2008 Chapter 1 Section 1 4 Introduction to the VSM Option Safety Precautions 1 4 3 Electricity WARNING The VSM and the PPMS are powered by nominal voltages that range from 100 V to 240 V AC These voltages are potentially lethal so you should exercise appropriate
114. eases linearly with amplitude after that it increases more slowly You might need amplitudes of 1 mm or less when you want to minimize the forces applied to the sample e g for fragile samples or samples of a powder or when the sample signal is very large At small amplitudes less than 0 5 mm the accuracy of the measurement will be reduced due to the limited resolution of the position encoder in the linear motor transport Important Quantum Design staff recommend that you limit the maximum Peak Amplitude to 3 mm because the motor module could overheat at greater amplitudes By limiting the maximum Peak Amplitude to 3 mm you also ensure that the sample holder clears the puck surface For example taking into account that the detection coils are 40 mm above the puck surface and using a sample offset of 35 mm the use of a Peak Amplitude of 5 mm or greater would cause the sample holder to touch the puck surface which could dislodge the sample or the sample rod Quantum Design PPMS VSM Option User s Manual Rev A3 6 15 January 2008 VSM Control Center Chapter 6 VSM Software o The Frequency is 40 Hz it specifies the frequency with which the VSM oscillates the sample o Max Accel is computed from Frequency 40 Hz and the Peak Amplitude entry it represents the maximum acceleration the sample will experience during a measurement in units of meter per second squared Important Do not proceed with a measurement if your sample
115. eesseeeseeeseeeseecseecsaecaecseceseeeseeseeeseneseaeesseeeeeeaaes 1 1 1 21 What t Measures adi 1 1 1 2 2 Notable Features of the VSM System ccccccccccssesseesseesseesecsseceseceseesseeeeeeeeeeseseesaeeaaees 1 1 1 3 Theory of Operation linterna ile ela ici 1 2 147 Safety Precautions Tyee ninne ei aa dE Adi dbs Rae eae Be 1 4 LAMA E E S 1 4 LADY Cry OBENS ATT E EE EEA PAE eka dans AAEE S latins 1 5 E e EE An A A E E E E E E E A 1 6 1 4 4 Lifting and Handling oisinnean nono nooo ccoo a Ea aa e eaaa ta daas 1 6 1 5 Contacting Quantum DesigN ooccciccnnonnnonnnonnnononnnnnnn cono ncnn ccoo ccoo nono nono nn con nc nr ran n ran rra na nr rra 1 7 CHAPTER 2 Installing and Removing the VSM Option ooocccononcnononnnonnnnonnnccononcconocacononocononoconococonnnconoss 2 1 ZENG UNMET A TEN 2 1 2 2 Initial Installation of the Hardware and Software ccccccscssecesecetsceesceeecseeeeeseeeneeeseeeseeeeeeaaes 2 1 2 2 1 Install the Modular Control System and CAN Network Adapter ooconconccncononncncocccononncnnos 2 3 2 2 2 Insert the Control Modules 4101 150 and 4101 100 oo eee ceceeseceseceteceteeeeeeeeeeeeeeeees 2 4 2 2 3 Prepare the PPMS for Option Installation ooonoocnncnocnnnonnonnnonnconncon nono nono noconnconncnnnonononaos 2 4 2 2 4 Install the Coilset PUCK mida tii 2 6 225 Insertithe Sample Tube 2 7 2 2 6 Mount the VSM Linear Motor Transport cccccccsecsseesseesceeseeceecssecesecnseceseeneeeseeeeeneeans 2 8 2
116. elector on the back panel is used to set the four least significant bits while an internal jumper sets the most significant bit If the selector is set to 0 the module uses its default address For a Model CM B VSM detection module the default address is 8 B 4 2 Guide Holes The two guide holes are used to align the connector with either a low power receptacle or a high power receptacle on the Model 1000 modular control system QD CAN CONNECTOR GUIDE HOLES ADDRESS SELECTOR Figure B 5 Rear panel of the Model CM B VSM detection module B 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix B Model CM B VSM Detection Module B 4 3 QD CAN Connector Section B 4 Model CM B Detection Module Rear Panel The QD CAN connector is the main communication connection for controlling the Model CM B VSM detection module The CAN network signals CAN High CAN Low are connected to all other CAN modules on the bus and to the PC Power 4 sent to the module though this connector OOO00 OOOO E 24 volts reset and sync signals also are J gt E m Figure B 6 QD CAN connector on rear of the Model CM B VSM detection module Table B 5 QD CAN connector on the rear o VSM detection module f the Model CM B PIN FUNCTION 24 V CAN Low Power Return 24V Sync Low Line Sync System Ground CAN High
117. elow for more on this issue 6 9 2 4 To set the number of times the VSM will measure between your selected Hmax and Hmin click on the button next to Number of Fields Min to Max The value you enter into the text box next to Number of Fields Min to Max sets the number of data points the VSM will take between Hmax to Hmin including Hmax and Hmin spaced uniformly in the manner you have selected To directly set the increment in magnetic field between VSM data points click on the button next to Field Increment If you select the Field Increment radio button you must enter a number in the associated text box If you set a step size that does not fit evenly with your selected Hmax and Hmin the program will adjust the increment size slightly to include Hmax and H min Note Because uniform spacing is referenced between Hmax and Hmin the field you enter for Ho might not be used in the measurement if the combination of uniform spacing and number of fields does not line up evenly with Ho If this occurs Ho will only be included as a data point if it is selected as the starting or ending field or both of the measurement Field Contra Approximate al Sweep Rate fi 0 Oe sec Drive teach field Data Acquisition Continuous Measuring pe Keep all measurements ha all measurements 50 of measurements 20 of measurements 1 of measurements Figure 6 36 Data Acquisition Keep and
118. empt to use the connector A 3 2 3 JA 3 MOTOR SYNC CONNECTOR This connector outputs the motor encoder position as a high speed digital serial signal This would normally be connected to a synchronous detection module such as the Model CM B VSM module OOOO 0 0 9 fas f O Figure A 4 JA 3 Motor sync connector for the Model CM A VSM motor module Table A 4 JA 3 Motor sync connector for the Model CM A VSM motor module PIN FUNCTION Sync Data Clock PSync Ground Sync Data Clock O folni ni a Ri ow hd PSync Quantum Design PPMS VSM Option User s Manual Rev A3 A 5 January 2008 Section A 3 Appendix A Model CM A VSM Motor Module Front Panel Model CM A VSM Motor Module A 3 2 4 JA 4 AUX CONNECTOR This connector provides three analog inputs and three digital I O lines for future options OOOO OOOO J m Figure A 5 JA 4 Aux connector for the Model CM A VSM motor module Table A 5 JA 4 Aux connector for the Model CM A VSM motor module PIN FUNCTION 5 V Digital I O P3 10 n c Analog Input P5 13 Ground Digital I O P3 11 Digital I O P3 8 Analog Input P5 12 OfolrmNeNt_ ota Ri wld Analog Input P5 14 A 3 2 5 JA 5 MONITOR BNC This connec
119. endent magnetization measurements at different fields followed by hysteresis loops at specific fields When you use a sequence file the system can perform these procedures without your intervention Quantum Design PPMS VSM Option User s Manual Rev A3 6 1 January 2008 Section 6 3 Chapter 6 MultiVu Software Application VSM Software 6 3 6 3 1 DC magnetization measurements performed by the VSM system are defined by user specified measurement parameters The measurement parameters are usually grouped into basic settings and advanced settings to distinguish commonly specified parameters from those that are required under special circumstances Measurement results and other relevant data reported by the VSM motor module VSM detection module and Model 6000 PPMS controller are stored in VSM measurement data files MultiVu Software Application The MultiVu software application is the interface to the Quantum Design Physical Property Measurement System PPMS and to the different options that can be installed on the PPMS Option specific commands such as those for VSM operations are added to the menus when you activate the option by using the dropdown Utilities menu as explained in Section 6 3 2 1 MultiVu Basics As shown in Figure 6 1 the top of the MultiVu window has a series of dropdown menus and a tool bar At the bottom of the MultiVu window a Status bar summarizes the general status of the PPMS and any active option You ca
120. erations For example if Delta Time is set to 5 minutes and it has been 5 minutes since a manual or automatic centering operation has been performed the system will automatically trigger a touchdown operation Use a value of zero 0 if elapsed time should never trigger a touchdown o Delta Field is the maximum allowed field change in Oe between touchdown operations For example if Delta Field is set to 10000 Oe and the field has changed by more than 10000 Oe without any manual or automatic centering operations the system will automatically trigger a touchdown operation Use a value of zero 0 if a field change should never trigger a touchdown 6 14 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 Section 6 5 VSM Software VSM Control Center o Delta Temperature is the maximum allowed temperature change in Kelvin between touchdown operations For example if Delta Temperature is set to 20 K and the temperature has changed by more than 20 K without any manual or automatic centering operations the system will automatically trigger a touchdown operation Use a value of zero 0 if a temperature change should never trigger a touchdown No Automatic Centering When you select No Automatic Centering you disable automatic touchdown operations the system will never automatically trigger a touchdown centering operation Important When automatic centering has been disabled you are responsible for performin
121. erature set points will be distributed uniformly over your defined temperature range in the manner you have selected If you select the Number of Temperatures radio button you must enter a number in the associated text box The Temperature Increment value sets the temperature increment in degrees Kelvin between VSM measurements If you select the Temperature Increment radio button you must enter a number in the associated text box Note If you set a step size that does not fit evenly with your selected Start and End temperatures the program will adjust the increment size slightly to include the Start and End temperatures Stab ach Temperature 299 87 Soe 299 7 Averaging Time 1 sec 53958 20 of measurements 10 of measurements 5 of measurements 2 of measurements 1 of measurements explanation below for more on the issue of Figure 6 42 Data Acquisition section Keep file size Approximate Temperature and Estimated settings 6 30 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 Section 6 10 VSM Software Sequence Mode VSM Moment vs Temp Command 6 10 2 3 APPROX TEMPERATURES The Approx Temperatures list Figure 6 42 displays in sequence a close estimate of the temperatures at which the VSM will take data These temperatures are based on all your selections in the Temperature Control and Data Acquisition sections of the Setup tab 6 10 2 4 ES
122. ersus temperature measurement will end Sweep Rate The Sweep Rate value sets the rate at which the temperature changes in degrees Kelvin per minute during a measurement The Moment vs Temp sequence command interprets the Sweep Rate as a magnitude and uses the Start and End temperatures to determine the sign of the temperature sweep rate Note If you choose to stabilize the temperature during measurements the Sweep Rate will become the rate of temperature change between temperature set points instead of the overall rate of temperature change Stabilize at each Temperature and Sweep Continuously The Stabilize at each Temperature and Sweep Continuously options provide two modes for sweeping temperature When you select Stabilize at each Temperature the system waits for the temperature to stabilize at each of the set points listed in the Approx Temperatures window before it begins to take data When you select Sweep Continuously the system changes temperature at the Sweep Rate setting while the VSM takes data and it does not pause at the set points listed in the Approx Temperatures window 6 10 2 2 DATA ACQUISITION SETTINGS Use the options in the Data Acquisition subsection of the dialog box to set the basic parameters of the moment versus temperature measurement Data Acquisition Data Spacing Uniform Spacing in Temp y The Data Spacing dropdown menu bar at the A p ing Ti 1 top of the section provides the following o
123. et puck for detection electronics for driving the linear motor transport and detecting the response from the pickup coils and a copy of the MultiVu software application for automation and control Notable Features of the VSM System The Quantum Design PPMS VSM linear motor transport uses a uniquely designed linear motor to vibrate the sample Unlike other vibrating sample magnetometers that use a short throw resonant voice coil design you will find that the PPMS VSM linear motor is designed to operate at 40 Hz Quantum Design PPMS VSM Option User s Manual Rev A3 1 1 January 2008 Section 1 3 Chapter 1 Theory of Operation Introduction to the VSM Option with rapid slewing possible over about 6 5 cm of travel The large range of motion enables the PPMS VSM system to perform rapid completely automated centering operations you will not need to perform manual adjustments to center the sample The sensitivity of the VSM coils is not significantly affected by large magnetic fields so the PPMS VSM can perform sensitive measurements up to the maximum field available from your PPMS magnet The VSM detection coil is inserted into the PPMS sample chamber by using the standard PPMS sample interface design This procedure will make it easy to reconfigure the VSM option with alternate pickup coil designs in the future You will find that you can change the pickup coil configuration as easily as you can change a puck You will find it easy to ac
124. first turned on but they will turn green shortly See Appendix A and Appendix B for further information on the LEDs Prepare the PPMS for Option Installation To prepare the PPMS system for installation of the VSM option you will use the PPMS MultiVu application to warm the PPMS sample chamber to 300K set the magnetic field to zero 0 Oe and vent the sample chamber Then you will remove any sample puck or option that is currently installed in the chamber When you do this be sure to remove the standard centering ring from the chamber opening the VSM has a custom designed centering ring 1 Set the PPMS system temperature to 300 K e Open the Temperature System dialog box select Instrument gt gt Temperature and specify a set point of 300 K as shown in Figure 2 2 e Click on the Set button e Leave the dialog box open so that you can monitor the temperature until it reaches at least 290 K do not continue with installation until the temperature reaches at least 290 K 2 Inthe Temperature dialog box click on the Close button PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Installing and Removing the VSM Option Section 2 2 Initial Installation of the Hardware and Software A Temperature System xi m Status Temp 14450 K State Stable r Control Set Point 300 10 k Rate 12 00 K min Mode Fast Settle sn Fi
125. g centering operations You can do this periodically by selecting Measure gt gt VSM Center Sample from the MultiVu dropdown menu bar which will open the VSM Center Sample popup Figure 6 10 As an alternative you can insert the Center Sample sequence command into a sequence file that is run during the measurements as explained in Section 6 8 6 5 3 5 VSM MEASUREMENT DIALOG ADVANCED TAB The Advanced tab of the VSM Measurement dialog Figure 6 21 contains settings for Excitation Parameters Ranging and PPMS Data Logging Excitation Parameters 2 5 xi o The default setting of the Peak Saira conte MA eens Amplitude option Excitation Peak Temperature 11 9 K Parameters section is suitable for most or 7400000 ge situations so you can generally leave it alone However it offers additional 69766 emu control over your measurements You do M e not set the Max Accel and Max eS nos Std Eno 002358 emu Moment values because they change in 2 hojarna accordance with the Peak Amplitude rt E setting Yet these two values help you PPMS Data Logging Select assess whether the amplitude setting is 1 suitable for your sample and its characteristics Figure 6 21 Advanced tab in the VSM Measurement dialog o The Peak Amplitude is typically set to 2 mm it specifies the peak vibration amplitude i e one half the peak to peak amplitude of the sample during a measurement Up to about 2 mm the signal to noise ratio incr
126. g a touchdown operation 3 3 3 Sample Holder Variations You can also use the paddle shaped sample holder shown in Figure 3 2 A set is included in the VSM Option User s Kit For this approach you can glue a sample to the side of the paddle or you can use a long piece of clear plastic heat shrink tubing to hold the sample In either case it is Important to minimize cross sectional variation along the length of the holder For example with the heat shrink tubing you should verify that the tubing is free of cuts or kinks which could appear as a signal and that the tubing extends the full length of the beam MOUNT SAMPLE HERE THREAD 10 32 Figure 3 2 Paddle shaped sample holder 4096 392 3 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 CHAPTER 4 Taking VSM Measurements 4 1 4 2 4 2 1 Introduction This chapter contains the following information o Section 4 2 summarizes the o Section 4 4 describes how to take measurement process when you use immediate mode measurements with the the Quantum Design VSM option VSM option o Section 4 3 describes how to install o Section 4 5 describes how to remove a samples for taking VSM measurements sample from the VSM Overview of VSM Measurements A VSM measurement consists of a sequence of centering operations followed by the oscillation of the sample and synchronous detection of the voltage induced in the coilset by the magnetized sample In preparat
127. hat you issue directly from the VSM Control Center Figure 4 4 and from the PPMS MultiVu Measure menu Figure 6 9 for example by clicking on buttons in dialog boxes Sequence mode corresponds to commands that are executed from within a running sequence file These commands are inserted into the sequence file by using the MultiVu Sequence Editor as explained in Chapter 6 and in the Physical Properties Measurement System PPMS MultiVu Application User s Manual While immediate mode provides you with an interactive approach to measurements sequence commands allow you to set up the system so that it will perform complex data acquisition activities like magnetic hysteresis loops temperature sweeps and programmed touchdowns consistently and without your attention If you disable automatic centering Quantum Design staff strongly recommend that you use a sequence to perform your measurements including frequent touchdowns Important Data from any measurement type or mode will be saved only if you have designated selected or created a VSM data file see Sections 4 3 3 6 5 2 2 and 7 3 4 for more about designating data files Quantum Design PPMS VSM Option User s Manual Rev A3 4 3 January 2008 Section 4 3 Chapter 4 Installing a Sample Taking VSM Measurements 4 3 Installing a Sample This section takes you through the process of installing a sample into the VSM sample chamber starting with a description of how the sample is attached
128. he a Sequence Commands bar e g mawe ESRC Figure 7 1 1 Nes of type equence Files seq Tl Open as read only Figure 7 12 Select a Sequence File dialog 7 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 7 Section 7 3 VSM Architecture and Data Files VSM Data Files Place your cursor in the sequence file where you want the New Datafile command inserted In the Sequence Commands bar select and double click on the New Datafile sequence command Measurement Commands gt gt VSM gt gt New Datafile The New Datafile command will open the VSM Change Datafile dialog Figure 7 13 which operates in a way similar to the immediate mode commands found in the Data File tab of the VSM Control Center see Section 6 5 The VSM Change Datafile dialog has text boxes and buttons that allow you to designate the File Action Create New File Version or Append to File the file name and a title for the graph data YSM Change Datafile E xi Path Browse Name Title File Action Create New File Version C Append to File Cancel Help Figure 7 13 Command dialog for changing the data file during a sequence measurement 10 Quantum Design Note The VSM Change Datafile dialog does not allow you to designate sample properties If you designate a new file it will inherit the properties ofa dat file specified by the VSM Control Center In the File Action area of th
129. he sequence is executed Refer to the Physical Properties Measurement System PPMS MultiVu Application User s Manual for detailed information about sequence files and their construction Each VSM specific sequence mode command Adv Measure Center Sample Datafile Comment Moment vs Field Moment vs Temp and New Datafile is associated with one or more dialogs that allow you to specify the command parameters Adv Measure Center Sample Moment vs Field and Moment vs Temp are explained in Sections 6 7 6 10 The Datafile Comment and New Datafile sequence commands are explained in Section 7 3 VSM Data Files 6 7 Sequence Mode VSM Adv Measure Command When you select and click on the sequence mode Adv Measure command the sequence mode VSM Measurement dialog opens so that you can specify the measurement parameters 6 7 1 Sequence Mode VSM Measurement Dialog The sequence mode VSM Measurement dialog is similar to the immediate mode dialog with Settings Centering and Advanced tabs Figures 6 25 6 27 However there are only three buttons at the bottom of the dialog OK Cancel and Help and the panels do not have a Last Measurement area Aside from any differences noted below the parameters and actions in the VSM sequence mode dialogs are the same as for the comparable immediate mode dialogs You can insert the sequence mode Adv Measure command at any time by clicking on the OK button at the bottom of the dialog The Cance
130. hronous detection or lock in operation for the VSM option The reference position signal comes from the Model CM A VSM motor module via the VSM motor sync cable the induced voltage signal from the coilset puck comes via the preamp cable assembly All configuration and control of this module is handled through the VSM application software on the computer PC via the CAN bus connector on the back panel of the module See Appendix B for a detailed description of the functions of this module 0 Figure 5 13 Model CM B VSM detection module 4101 150 Quantum Design PPMS VSM Option User s Manual Rev A3 5 10 January 2008 Chapter 5 Section 5 5 VSM Hardware VSM Electronics 5 5 6 Model 1000 Modular Control System The Model 1000 modular control system 4100 001 is a general purpose chassis Figure 5 14 that houses cools and provides power to both the Model CM A VSM motor module and the Model CM B VSM detection module The Model 1000 can accommodate up to four additional modules for other PPMS options The backplane provides connections for power as well as a CAN based network connection to the computer PC See the Model 1000 Modular Control System User s Manual for more information about the Model 1000 modular control system Figure 5 14 Model 1000 modular control system 4100 001 5 5 7 CAN Computer Interface Kit The CAN computer interface or network adapter kit contains the CAN based net
131. igure 6 17 Sample tab in the VSM Control Center 6 5 2 4 ADVANCED TAB The Advanced tab Figure 6 18 organizes support for troubleshooting for example checking calibrations and troubleshooting system performance Hence you will use the options on the Advanced tab only if you are an experienced VSM operator o The Units of Measure options allow you to record in emu or in A m ampere meters squared By default the measures are recorded as emu o The Motor Friction Scan button moves the VSM linear motor transport through the full range of motion The system plots the motor force as current as a function of position for both lifting the sample and lowering the sample A difference between these two curves indicates friction due to ice or other obstructions YSM SIM new vsm2 dat loj xj Install Data File Sample Advanced Motor Friction Scan Status Measure Help SM Ready Figure 6 18 Advanced tab in the VSM Control Center 6 12 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software 6 5 3 Section 6 5 VSM Control Center VSM Control Center Measure Button The Measure button in the VSM Control Center opens the VSM Measurement dialog box Figure 6 19 which organizes immediate mode measurement settings and initiates measurements The dialog has a section showing the measurements three tabs Settings Centering and Advanced and three buttons Start S
132. ile select File gt gt Open gt gt Sequence on the MultiVu dropdown menu bar Figure 6 23 The Select a Sequence File dialog will open showing the available files Mppms Multivu Simulation Mode i 0 x File View Sampe Sequence Measure Graph Instrument Utilities Help New Sequence Ctri N F Inmlal el Open Ctri O gt Sequence cose DataFile Graph Print Setup Exit Select a Sequence File aixi Look in 4 Sequence e c em PJ Example seq sequence2 seq sequence3 seq BKG_vs_T_modified seq Sequencel seq File name Sequencel seq Files of type Sequence Files seg y Cancel F Open as read only 4 Figure 6 23 Opening a sequence file by using the MultiVu dropdown File menu Quantum Design PPMS VSM Option User s Manual Rev A3 6 17 January 2008 Section 6 6 Overview of Sequence Mode Commands 6 6 2 Chapter 6 VSM Software o When you have selected and opened a file it will open in the Sequence Editor which is shown in Figure 6 24 as Sequencel o The Sequence Commands bar shown at the right side of Figure 6 24 should open at the same time as the sequence file If it does not select View gt gt Sequence Command Bar from the MultiVu dropdown menus To create a new file containing sequence mode commands select File gt gt New Sequence on the MultiVu dropdown menu bar The Sequence Editor dialog and the Sequence Comm
133. in the VSM Sample Properties dialog If you designated a pre existing file as the data output file the dialog will display the sample information from that file 12 Click on the Next gt gt button at the bottom of the dialog Page 4 of the VSM Install wizard will open Figure 4 10A in which you can scan for the sample offset or enter your measurement of the sample offset position the value you obtained by using the sample mounting station shown in Figure 4 2 Quantum Design PPMS VSM Option User s Manual Rev A3 4 9 January 2008 Section 4 3 Chapter 4 Installing a Sample Taking VSM Measurements SM Install Remove Sample Wizard q xi Sample Holder Coordinates for Center Position Sample Holder ISS Last Sean Offset 3394 mm lt Scan for Sample Offset Jeo THES tote Hee He tH She a ve Entes fet may 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 Advanced Centering Sample Offset mm lt lt Back i Cancel Figure 4 10A The VSM Install wizard page 4 Entering sample holder coordinates 13 Click on the Scan for Sample Offset button right hand side of the dialog in Figure 4 10A The graph will reflect the progress of the scan 14 When the system has completed the scan a xi popup dialog will appear Figure 4 10B so C The measured offset is 33 79 mm that you can accept or reject the scanned N To use this measured value click OK value Cancel a To accept
134. in defines the minimum field used in the measurement Note Uniform spacing is referenced between Hmax and Hmin This can affect whether Ho is used in the measurement as is explained below in the Data Acquisition subsection o Select Start End Quadrant Figures 6 31 and 6 32 allows you to use your mouse to set the starting and ending fields of the measurement To set the starting and ending quadrants the area between the field set points place your mouse pointer in the diagram left click the field for the start of the measurement drag the pointer to the end field and release the left button The selected quadrants will be highlighted and included in the measurement 6 9 2 2 FIELD CONTROL SETTINGS Use the settings in the Field Control section Figure Er Control 6 33 of the Setup tab to control how the magnetic fo field changes between the field set points Sweep Rate 10 Becs Driven at each field Sweep Rate Persistent at each field The Sweep Rate value sets the rate at which the Sweep field changes when the magnet is ramping up or End Mode Persistent 7 down The Physical Property Measurement System Hardware Manual has more information Figure 6 33 Field Control section of about the Sweep Rate setting the VSM Moment versus Field dialog Driven at each field The Driven at each field radio button sets the magnet to stabilize the field in Driven mode at each field shown in the Approximate Fields list Figures 6 29
135. in the Excitation Parameters subsection Figure 6 37 to set the drive variables for the VSM linear motor transport For more information on these options see Section 6 5 3 5 Sequence Mode VSM Moment vs Temp Command The VSM sequence mode Moment vs Temp command is designed to make these types of measurements easy to set up and execute in a sequence You can use the Moment vs Temp command to rapidly set the VSM to take data while sweeping temperature in a variety of different patterns You also can control when data is taken with respect to temperature increment e g uniform spacing in Log Field or 1 Field which facilitates plotting the data When you click on the sequence mode Moment vs Temp command in the Sequence Commands bar the sequence mode VSM Moment versus Temperature dialog opens Figures 6 38 and 6 39 Sequence Mode VSM Moment versus Temperature Dialog The VSM Moment versus Temperature dialog has two tabs Setup Figure 6 38 and Advanced Figure 6 39 Use the Setup tab to set the parameters for a variable temperature measurement Use the Advanced tab to control other aspects of the measurement such as the temperature approach mode As is explained below the tabs have several unique functions as well as some of the same functions found in the sequence mode Scan Temperature and VSM Adv Measure commands Quantum Design PPMS VSM Option User s Manual Rev A3 6 27 January 2008 Section 6 10 Chapter 6 Sequence
136. ing the VSM Option 2 2 6 Mount the VSM Linear Motor Transport WARNING Verify that there are no nearby sources of magnetic field e g NMR or other laboratory magnets before attempting to install or remove the linear motor transport as explained in Section 1 4 1 The VSM linear motor transport Figure 2 9 moves the sample You will mount the linear motor transport directly on top of the PPMS sample chamber opening after you have inserted the sample tube into the sample chamber Before you install the linear motor transport you must remove the shipping plug and install the extender tube flange assembly See Chapter 5 for more information on the linear motor transport and its operations SAMPLE ACCESS PORT AND MAGNETIC LOCK RING ELECTRICAL EXTENDER TUBE CONNECTOR FLANGE REAR VIEW SHIPPING PLUG FRONT VIEW Figure 2 9 Front and rear views of the VSM linear motor transport 4096 400 The rear view right shows the transport with the shipping plug installed in the front view left the shipping plug has been replaced by the extender tube flange CAUTION Quantum Design recommends that you have another person help you install the VSM linear motor transport it is fragile bulky and moderately heavy about 10 kg or 22 Ib Always use the VSM specific parts e g the centering rings to ensure that the equipment operates safely and properly Always use the flange clamp Figure 2
137. ion for the measurement you will use the automated VSM Install Remove Sample Wizard to install the sample After that the VSM application software completely automates the next steps which include centering the sample setting measurement parameters and setting up measurement command files as well as operations that are more advanced The measurement process and use of the software are explained in the following subsections Important Before you attempt to begin the measurement process verify that the VSM option and the application software have been installed Chapter 2 and the sample has been mounted on the sample holder Chapter 3 Sample Centering Accurate VSM measurements require that the system oscillate the sample in the center of the coil pair see Figure 5 3 and that the centering position be kept stable to within about 0 1 mm at the center of the pickup coils The 0 1 mm stability is maintained by periodic touchdown operations that adjust for changes in the sample position For example during a measurement the temperature of the PPMS sample chamber changes With the sample chamber and the sample rod being affected by different thermal expansions the sample shifts with respect to the coilset In addition magnetic fields from the PPMS 16 T magnet can deflect the motor assembly that is suspended inside the linear motor Quantum Design PPMS VSM Option User s Manual Rev A3 4 1 January 2008 Section 4 2 Chapter 4 Over
138. it will not be added to the output data file until you Run the sequence file Important A comment is a character string of unlimited length Do not use quotation marks in comments PPMS VSM Option User s Manual Rev A3 Jnauary 2008 7 7 Section 7 3 Chapter 7 VSM Data Files VSM Architecture and Data Files Viewing Comments You can view the comments that have been added to a data file by opening a view of the dat file and scrolling through it as follows 1 Select File gt gt Open gt gt DataFile from the dropdown menu at the top of the MultiVu window 2 The Select a Data File dialog will open this dialog is similar to the VSM Select Data File dialog shown in Figure 7 7 3 Select the data file you want to open and click on the Open button When the file has finished loading select a viewing format from the MultiVu dropdown menus e g View gt gt Table or View gt gt Raw Data In the Table view shown in Figure 7 5 comments would be included in the first column 7 3 6 Changing VSM Data Files during a Sequence Run You can redirect the data 1 e change the designated output data file during a measurement sequence by using the steps below to insert the New Datafile sequence command into a sequence file See the Physical Properties Measurement System PPMS MultiVu Application User s Manual and Section 6 6 in this manual for more details about sequence files and their construction Important T
139. ivate Option selected cee eceececeeseeeeceteeneeeeeeneeaes 2 11 Figure 2 13 Activating the VSM option with the Option Manager dialog box eee 2 11 Figure 2 14 VSM Control Center VSM SIM and VSM Log Window oococcococononcnonoconoconocnonos 2 12 Figure 2 15 PPMS MultiVu menu bar and Measure dropdown menu for VSM option 2 12 Figure 2 16 Configure VSM System dialog page l oonoconinnninnnocnnocnnonnnoononanonon cono nonn nooo nono nocnnonos 2 13 Figure 2 17 Configure VSM System dialog page 2 Testing calibration file eee 2 13 Figure 2 18 Warming the system to 300 K with the Temperature System dialog box 2 14 Figure 2 19 Setting the field to zero 0 with the Field dialog box icc eeceecceseeeeeeeceteeneeeneeaee 2 15 Figure 2 20 Venting the chamber with the Chamber dialog DOX eceecesesseeececeeeeeeeeeseeeeees 2 15 Figure 2 21 VSM Control Center VSM SIM and the Install tab 0 ee eeeeeeeeeeeeeteeneeeeeeeee 2 18 Figure 2 22 VSM Install Remove Sample Wizard dialog page 1 Open Chamber 2 20 Figure 2 23A VSM Install Remove Sample Wizard dialog page 2 Preparing the sample Chambet ccccccccessceeseeeeceeeeeseeeeeeeeeeeensecnsecneenaeen 2 20 Figure 2 23B VSM Install Remove Sample Wizard dialog page 2 Install or remove sample 2 21 Figure 2 24 VSM Ppmsmvu popup dialog with shutdown instructiONS ooooocnnnconococonononoconanos 2 21 Figure 2 25A VSM Inst
140. izard will close and you will be returned to the VSM Control Center and the Install tab Quantum Design PPMS VSM Option User s Manual Rev A3 4 19 January 2008 CHAPTER 5 VSM Hardware 5 1 5 2 5 2 1 Introduction This chapter contains the following information o Section 5 2 describes each of the basic o Section 5 4 describes the sample mounting hardware components that make up the station and its use VSM option o Section 5 3 describes the contents of the o Section 5 5 describes the electrical VSM User s Kit components of the VSM option VSM Hardware Components This section describes each of the basic hardware components that make up the VSM system For instructions about installing the various components please refer to Chapter 2 Linear Transport The VSM linear transport 4096 400 is the motor that moves the sample The linear motor transport and many of its component parts are illustrated in Figure 5 1 You will mount the linear motor transport directly on top of the PPMS sample chamber opening after you have inserted the sample tube into the sample chamber The sample rod is inserted into the sample chamber through an access port on top of the VSM linear motor transport The sample chamber is sealed for storage and during operations by a cap and an O ring seal An electrical connector at the rear of the linear motor transport provides the Model CM A with electrical access to the drive coil position encoder an
141. ke added to the current file select the accompanying check box e When you are finished click on the OK button IV General Status TP Brg Ch 1 Resistance FF Map 20 TF Brg Ch 1 Excitation F Map 21 TF Brg Ch 2 Resistance F Map 22 TF Brg Ch 2 Excitation F Map 23 I Brg Ch 3 Resistance FT Map 24 T Brg Ch 3 Excitation W Sample K I Dr Ch 1 Current I Brg Ch 4 Resistance T Map 26 I Dr Ch 1 Power I Brg Ch 4 Excitation Map 27 FF Dr Ch 2 Current IF Sig Ch 1 Input Voltage Map 28 FF DrCh 2 Power TF Sig Ch 2 Input Voltage TF Map 29 OK Close Help Figure 4 19 Designating additional measurement data to be collected by using the PPMS dialog 4 4 3 Starting Stopping Pausing a Measurement 1 To start the VSM measurement process click on the Start Stop button at the bottom of the current panel of the VSM Measurement dialog The right panel of the dialog box will display VSM measurement results as they are acquired see Figure 4 18 The displayed data are also written to the open data file along with the data items that are defined in Chapter 7 Table 7 2 2 To stop sending new readings to the dialog box and the data file click on the Pause Resume toggle button next to the Start Stop button Although the system does not save or update readings during a Pause it will continue oscillating the sample and executing any automatic touchdown operations that were scheduled 3 To restart the data output after a pause
142. l 1 Quantum Design You can use the Excitation leis Parameters section to set the Settings Centering Advanced Last Measurement Peak Amplitude Oscillation Estan Parameters uel K Frequency is set to 40 Hz Amplitude 20 mm y Note that the Max Accel and Frequency 40 Hz Field 140000 0 ge Max Moment readings will Max Accel 126 33 _ change in accordance with the te ere ee ds settings used for Peak Poca a Moment 0 042358 emu Amplitude 1 Important Before you attempt to change the Peak Amplitude PPMS Data Logging Select o aa read about it in o HA HER ection 6 5 Figure 4 18 VSM Measurement dialog Advanced tab Peak Amplitude specifies the peak vibration amplitude i e one half the peak to peak amplitude of the sample during a measurement in mm Typically Peak Amplitude is set to 2 mm Frequency specifies the frequency at which the VSM oscillates the sample The system uses an oscillation Frequency of 40 Hz Max Accel is computed from Frequency 40 Hz and the value that you entered for Peak Amplitude It is the maximum calculated acceleration during a cycle Max Moment is computed from Frequency 40 Hz and the value that you entered for Peak Amplitude It is the maximum measurable moment The Ranging setting refers to the way the system chooses the gain of the amplifiers in the VSM module during a measurement The preamplifiers in the VSM
143. l CM A motor module and Model CM B VSM detection module VSM Transport ee Windows tool tray The VSM linear motor transport The window at the front of the head where the position of the armature can be seen Usually the lower right corner of the computer screen in the same area where the system time is displayed BRILE MERRI G 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Index A Activate Option 2 10 2 11 2 17 4 5 6 3 6 4 Adv Measure cccccccceeeeeees 6 19 6 21 alignment pin See module bays Amplitude Peak 4 15 6 15 6 16 armature See VSM linear motor transport head IN 4 15 6 15 6 16 Averaging Time 4 13 4 14 6 13 6 14 6 25 6 30 B bottom weldment flange See extender tube flange C cables 2 2 2 4 2 10 5 8 5 9 G 1 G 3 connection diagram 2 3 2 10 preamp assembly 2 2 2 3 2 10 5 8 Slots ria a a a a iali G 1 motor drive cable 2 2 2 3 2 10 5 9 G 2 VSM Motor Sync Cable 2 2 2 4 2 10 5 9 calibration standard sample 3 1 5 7 CAN computer interface kit 2 2 5 11 CAN network adapter kit See CAN computer interface kit CAUTION 2 8 2 16 2 17 2 21 2 23 4 3 4 18 5 2 5 3 5 5 6 9 center position See centering operation Center Sample 6 7 6 15 6 21 centering operation 4 1 4 3 4
144. l button closes the dialog and does not insert the command Quantum Design PPMS VSM Option User s Manual Rev A3 6 19 January 2008 Section 6 7 Sequence Mode VSM Adv Measure Command SM Measurement xl Settings Centering Advanced Action gt Measure Type Continuous Measuring C Single Measurement Averaging Time fi Gos fo sec Cancel Help Figure 6 25 VSM sequence mode Measurement dialog Settings tab Logging Interval YSM Measurement 1 xi Settings Centering Advanced iy Do Touchdown Centering at Intervals oO min Delta Field jo De ca fi 0 K Delta Time No Automatic Centering 3 Cancel He Figure 6 26 VSM sequence mode Measurement dialog Centering tab Chapter 6 VSM Software SM Measurement X Settings Centering Advanced Excitation Parameters eak Amplitude 2 mm Frequency ao y Hz Max Accel fi 26 331 m sec Max Moment f o da Ranging Sticky Autorange C Always Autorange C Fixed Range 100m y PPMS DataLogging Select 3 Cancel Help Figure 6 27 VSM sequence mode Measurement dialog Advanced tab 6 7 1 1 SEQUENCE MODE VSM MEASUREMENT DIALOG SETTINGS TAB This Settings tab Figure 6 25 allows you to specify the action to be taken which is different from the immediate mode VSM Measurement Settings panel Thus the Action subsection and its Start Reconfigure and S
145. l who work with and around the superconducting magnets should review thoroughly documentation for new equipment 1 4 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 1 Section 1 4 Introduction to the VSM Option Safety Precautions Important The automated control system can turn on the magnet while the system is unattended Furthermore the three dimensional magnetic field of the PPMS will penetrate nearby walls the ceiling and the floor Therefore your safety considerations should include such adjacent spaces Keep all iron nickel and other ferromagnetic objects at least 5 m 16 5 ft from the PPMS dewar Large magnets such as the PPMS superconducting magnets can attract iron and other ferromagnetic materials with great force The observable effects of magnetic fields are listed in Chapter 1 of the Physical Property Measurement System Hardware Manual Never attempt to install remove or handle the VSM linear motor transport 4096 400 when there is a field set in the PPMS or in any other nearby equipment In addition the VSM linear motor transport must be secured when it is stored within 5 m 16 5 ft of the PPMS or any other large field source The VSM linear motor transport contains nearly 9 kg of iron which presents a considerable hazard in a large magnetic field such as that produced by the PPMS or other laboratory equipment such as an NMR magnet 1 4 2 Cryogens WARNING Always w
146. le ccc eeccescesscessceseceeeeeeeeeeeeeeseeeseeeseecseenseeeaeens 7 6 7 3 5 Adding a Comment to a VSM Measurement Data File ooooooonnocinoninoniocnnoncnonoconoconocnocos 7 7 T3ID 1 Append Immediately i i a E A E a A A AEE A AASR 7 7 T352 Append inthe F t rist ia ane i ET O a Taea TEA 7 7 7 3 6 Changing VSM Data Files during a Sequence RUN ooonoccnnoniocnnonononnnonnnonnconncon nono nocnocnonns 7 8 APPENDIX A Model CM A VSM Motor ModuUle ooooccooccoconncnncnncononnccnonoconococcnonccooocncooonccoocononoo conoce conan A 1 AA A NN A 1 A2 Functional OVS VI Westin tb A a A AAA A 1 A 2 1 Functional Block Diagram ccccccceccsseceseceseceeceseeseeceseeeeseceseeeseeeseecsaecaaecsaecneeseeeesneeaes A 2 E SPOCUbI CATIONS 257 a2 pe aaeus iesakeesd O a A 3 A 3 Model CM A VSM Motor Module Front Panel ooooonoccnocnnocnnocnnonononnnonnnoncconccon ccoo nono noconocnnncnos A 3 Acids Indicator EDS aid A 3 A 3 2 Connectors and Pinout Tables cccccccecssccsseeseeseessecnsecesecesecnseeseeseeeeeeeeeseeeseeseeeaeeaees A 4 A 3 2 1 JA 1 Servo Connector 00 cc ecccceecceceseceesseceesceceeceeceaeeeeaaeceeaeeceeeeecsaeeeeaaecseateseeeeees A 4 A322 JA 2 Stepper COME A 5 A 3 2 3 JA 3 Motor Sync Connectors iea nai A 5 A 3 2A JAA Aux Connector iis a aE e Saas ves debe E a RA ER A EE REET A 6 A325 JA35 Monitor BN Ciara e EE E T E a A 6 A 4 Model CM A VSM Motor Module Rear Panel oooonoconocnnonncoonnonononoconcconccon ccoo ccoo nono noconocon
147. le The CAN network signals CAN High CAN Low are connected to all other CAN modules on the bus and to the PC Power 4 though this connector Figure A 7 24 volts reset and sync signals are also provided to the module OOOO DOOD Quantum Design CAN connector for the Model CM A VSM motor module Table A 6 QD CAN connector on the rear of the Model CM A VSM motor module PIN FUNCTION 24 V CAN Low Power Return 24V Sync Low Line Sync System Ground CAN High Sync High Reset O0O fo Xx oJp o pa po mn 24 VDC A 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 A PPENDIX B Model CM B VSM Detection Module B 1 Introduction This appendix contains the following information o Section B 2 provides a functional o Section B 4 describes the back panel overview of the Model CM B VSM and relevant components of the Model detection module including a block CM B VSM detection module diagram and electrical specifications o Section B 3 describes the front panel and relevant components of the Model CM B VSM detection module B 2 Functional Overview The Model CM B 4101 150 is a synchronous detection module that performs the real time signal processing for the VSM option The module and its front panel are shown in Figure B 1 The principle function of this module is to
148. le View Sample Sequence Measure Graph Instrument Utilities Help pleja e seal S gt Field Chamber Motion Analog Output Digital Output Current Drivers Bridge Channels Shutdown EverCool Figure 2 2 Temperature System dialog box 3 Open the Field dialog box Figure 2 3 to set the field to zero 0 Oe e Select Instrument gt gt Field e In the Field dialog box specify a Set Point of zero 0 Oe e Click on the Set button e Leave the dialog box open so that you can monitor the field until it is within 1000 Oe of zero do not continue until the field is within 1000 Oe of zero 0 4 In the Field dialog box click on the Close button r Status Field 95267 0 fe State Persistent r Control Set Point A0 De Rate 100 0 Oe sec Approach linear y Mode Persistent y Close Figure 2 3 Field dialog box WARNING Verify that there are no nearby sources of magnetic field e g NMR or other laboratory magnets before attempting to install or remove the linear motor transport as explained in Section 1 4 1 5 Open the Chamber dialog box Figure 2 4 to vent the PPMS sample chamber Quantum Design Select Instrument gt gt Chamber Click on the Vent Cont button Click on the Close button PPMS VSM Option User s Manual Rev A3 January 2008 2 5 Section 2 2 Chapter 2 Initial Installation of the Hardw
149. le Wizard E xl Chamber Status 200K Stable Sealed Instructions Press Open Chamber to do the following things Bring the sample chamber to room temperature Vent the sample chamber Move the transport to load position Otherwise press Skip gt gt Dpen Chamber TFT Use Extended Purge Back Skip gt gt Figure 4 5 The VSM Install Remove Sample Wizard dialog VSM Install wizard for short page 1 Open chamber 3 Click on the Open Chamber button below the Instructions area The wizard will bring the sample chamber to room temperature vent the chamber and move the transport to the load position and the Instructions area will show the status of these processes 4 When the Instructions area indicates that the chamber has been flooded and the transport is in the load position as reported in Figure 4 6 use the sequence outlined below to install the sample rod and sample SM Install Remove Sample Wizard 3 x Chamber Status 305 K Stable Venting continuously Instructions Chamber in Flooding state transport at load position Press Next to install new sample Dr Press Shutdown to remove sample and turn off transport Shutdown F Use Extended Purge Back Cancel Figure 4 6 The VSM Install wizard page 1 Install or remove sample 4 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Sec
150. ll sample 0 cesses 4 19 VSM linear motor transport 4096 400 cecccesccessceeseeeeeeeeeeeseeeseeeseeeeecnseenseenseees 5 2 Storage case 4096 150 for the linear motor transport coooconoccnonnnccnnonnnannnonnnonccnnnos 5 3 Coilset puck 4096 204 oo eececcccssesseesseeeseeeseecseeeeseeeseecsaecssecsseceseceseeneeseeesereseneeses 5 4 The internal dimensions of a standard coilset puck oooonocinccunocanoccnonononononoconocononos 5 4 VSM sample tube 4096 301 cccceeccessessseesseesecsecssecnsecnseceeeseeeeeeeeeseeeseeeseeetaeessees 5 6 VSM sample T0d 4096 352 secesce sceesatesecits srastaadeetiatead ds 5 6 VSM Option User s Kit 4096 100 ecccccccsseesseceteceseceeceeeeseeeeseeeeseeeseeeseeesaeesaees 5 8 Sample mounting station 4096 110 ccc ceccesseceseceseceseceeeceeeeseeceeeeesseeeseeeeeeseeesaes 5 8 Preamp cable assembly 3096 300 cccccccssecssecsseceteceneceecseeceeeeseeeeeseeeseeeaeeeseeeaeees 5 9 Motor drive cable 3096 200 cccccccssessseessecsecsecsseceecssecseeseeeseeeeeaeeeseeeeceseenaeees 5 9 VSM Motor sync cable 3096 400 ccecccesccesecesecseceeeeeeeeeeeseeeseeceeeeecsaeenseeeaeees 5 9 Model CM A VSM motor module 4101 100 ee eeccceseeeseeeeeeeeeeeeeteeeseeenaes 5 10 Model CM B VSM detection module 4101 150 cc eeeesceeseeeeeeeteeeteeeteeeteeesees 5 10 Model 1000 modular control system 4100 001 ooooncccicnnconnnononononononannnnnnonncc nnos 5 11 PPMS VSM Option User s Ma
151. mm at the center of the pickup coils by informing the system about sample position shifts with respect to the coilset To insert a centering operation into a sequence file click on the Center Sample sequence command in the Sequence Commands bar This opens the VSM Center Sample Sequence dialog shown in Figure 6 28 When the sequence file is run and the VSM Center Sample Seque y eque x program encounters the Center Sample VSM Center SOM z sequence command it temporarily halts the Press Center to perform tourchdown current VSM Adv Measure command operation to center sample in coilset During the pause the program performs a centering operation and adjusts the center of oscillation for the measurement Then it resumes the measure command continuing from the point where it stopped This operation takes about 20 seconds Cancel Help Figure 6 28 Sequence mode VSM Center Sample command VSM Center Sample Sequence popup The Center Sample sequence command is invaluable when you have disabled automatic centering by selecting No Automatic Centering but it is also useful when automatic centering has been enabled In the latter case you can place the Center Sample command in your sequence just before measurements that you would like to have performed without the interruption of a touchdown operation The measurement is still subject to the other parameters e g Averaging Time and Logging Interval that you have set but by expli
152. module can change the gain ranges by factors of ten depending on the size of the signal that is induced in the pickup coils You can change this setting from Sticky Autorange in the rare case when you need more control Sticky Autorange recommended The system automatically increases the gain by a factor of 10 if the current peak signal drops below 2 of the current range The system automatically decreases the gain by a factor of 10 if the current peak signal exceeds 50 of the current range Always Autorange The system automatically increases the gain by a factor of 10 if the current peak signal drops below 9 The system automatically decreases the gain by a factor of 10 if the current peak signal exceeds 100 In some cases the Always Autorange setting might improve the signal to noise ratio However it could also lead an increased number of range changes and a corresponding drop in data throughput Fixed Range The system always uses the specified gain range PPMS VSM Option User s Manual Rev A3 4 15 January 2008 Section 4 4 Chapter 4 Taking Immediate Mode VSM Measurements Taking VSM Measurements 3 The PPMS Data Logging section has links to a dialog for designating supplemental measurement data the typical items in a data file are shown in Table 7 2 e Click on the Select Data button The PPMS dialog Figure 4 19 will open showing additional PPMS system data items that can be saved e For any type of data you would li
153. motor transport is not being used it should be stored in this case You can keep the case on a shelf or in a cabinet so long as it is on a stable base and is stored upright as shown in Figure 5 2 CAUTION Because the storage case has a high center of gravity it is critical that you place it on a very stable base such as the floor Figure 5 2 Storage case 4096 150 for the linear motor transport 5 2 3 Coilset Puck The coilset puck contains the VSM detection coils and a thermometer for monitoring the sample temperature You will insert the coilset puck into the sample chamber by using the PPMS sample insertion tool also called the puck insertion extraction tool and the same procedures used to insert other types of pucks see the Physical Property Measurement System Hardware Manual for information on puck insertion and extraction You must install the puck before you insert the sample tube Quantum Design PPMS VSM Option User s Manual Rev A3 5 3 January 2008 Section 5 2 Chapter 5 VSM Hardware Components VSM Hardware The electrical connector at the VISK MA ANS a bottom of the coilset puck has a serial number see Figure 5 3 As explained in Sections 2 2 4 and 2 2 9 you will use these serial A numbers to verify the numbers lV Sa contained in the application ES E software The system uses the gt A serial numbers to identify the puck calibration information Hg The
154. n a E E E E O ASEOS 6 31 6 10 3 Sequence Mode VSM Moment versus Temperature Dialog Advanced Tab 6 31 6 1033 1 Centering Setit toc ea e a a a dia 6 31 6 10 3 2 Ranging Settings 0 0 0 ccccsccssecsseceseceseceseceeeceeeeseeeeeseeeseeeseeeseecsaecsaecaeceaeenseeeaeens 6 31 6 10 3 3 PPMS Data Logging Settings ccccccccsscessceesceeseeeseeeseeeseeeseeceeesaecaeceseenseeeaeens 6 31 6 1034 Advanced Settin OS a e 6 31 6 10 3 5 Excitation Parameters oiriin ine o iaoea nisa ea ae iaai Eee Si 6 32 viii PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Contents Table of Contents CHAPTER 7 VSM Architecture and Data Storage omonocoosoncosnoncnnnnnconcnncononocononocononocononoconococonoconocaconosa 7 1 AS A O OO 7 1 IS A E a neeabay oteuties senduael sngencdeduenedehsnes fede Seneeval sedebads dined lhecahed 7 1 Fld System File Structures IA Aa a 7 1 7 2 2 Software and Hardware Communications cccccccssccsseceseceseceseceeeceeeceeeeeseeeeseeeseeesaeesaes 7 1 7 2 3 Software and Hardware Status c cccceccccsscessceeseeesecsecseceseceseceseceeeeseeeseeeeeeeeeseeeeeeneeesaes 7 2 PLB NSM RO RN 7 2 PDS e EU a e e A a OS 7 3 13 NSM Data Ple oi 7 3 al Data File Header si dati ehevaccthe tetas hia vas tends dale tena toveenie ns 7 3 EIZ Views Of the Data ciiise marsen a aa a A E AR ie stag aacauseHastes 7 4 7 33 Fieldsin VSM Data Piles unio dai E ET ito 7 5 7 3 4 Creating a VSM Measurement Data Fi
155. n files named ScanData dat and ScanFriction dat 7 2 2 Software and Hardware Communications The VSM application software communicates with a number of software and hardware entities The VSM option acquires low level data and controls the motor by communicating with the motor module and VSM detection module through the CANComm d11 PpmsComm d11 communicates with the Model 6000 over the GPIB cable to perform chamber operations such as setting temperatures and fields An OLE interface communicates with MultiVu when the VSM option receives sequence commands Quantum Design PPMS VSM Option User s Manual Rev A3 7 1 January 2008 Section 7 2 Architecture 7 2 3 Chapter 7 VSM Architecture and Data Files Table 7 1 Software files required to operate the VSM option DIRECTORY C Qdppms vsm System FILES VsmMultiVu dll Vsm ini Vsm reg fcf C Qdppms vsm Calibration VSMCoil xxx cfg C Qdppms vsm LogFiles VsmLog txt ScanData dat ScanFriction dat Windows System CANComm d11 PpmsComm d11 Windows cancomm ini Software and Hardware Status 7 2 3 1 VSM LOG The VSM Log Figure 7 1 captures status messages from the VSM option If the VSM Log window is closed you can open it by selecting View gt gt VSM Status Log from the MultiVu dropdown menus e g Figure 7 2 The log is a scrolling list of the messages that appear one by one in the VSM Status ar
156. n show or hide the Status bar by selecting the appropriate option Minimum Maximum or None from the dropdown View menu at the top of the MultiVu window View gt gt Status Bar iA PPMS Multivu Simulation Mode 10 xl Dropdown File view Sample Sequence Measure Graph Instrument Utilities Help Menus u ufel Tool Bar Status Bar Minimum Tool Bar Y Maximum Sequence Control None SM Status Log SM Error Count Sequence Idle 272 60 K Stable 49813 0 De Persistent Status Bars Seq lt none gt Set 81 90 K Set 15631 0 De lt none gt 12 00 K min Fast Settle 100 0 Oe sec Linear 15058 70 He Figure 6 1 The MultiVu software application window and the View gt gt Status Bar dropdown menu Starting from the left the Status bar panels Figure 6 2 display information about a running sequence file the sample temperature the strength of the magnetic field and the status of the sample chamber If you place your mouse pointer on a panel and click on it the related dialog box will open so that you can initiate changes These dialog boxes are the same ones that open through the dropdown menus at the top of the MultiVu window Sequence Status Temperature Field Chamber y Sequence Idle 273 30 K Stable 74597 5 De Persistent 0 97 Tor Seq lt none gt Set 314 10 K Set 9986 0 Oe Undefined lt none gt 12 00 K min Fast Settle 100 0 Oe sec Linear 9408 70 He
157. nanonnos 6 23 Field Control section of VSM Moment versus Field dialog o ooonoconoccnoconinnco 6 23 PPMS VSM Option User s Manual Rev A3 xiii January 2008 Contents Table of Figures Figure 6 34 Figure 6 35 Figure 6 36 Figure 6 37 Figure 6 38 Figure 6 39 Figure 6 40 Figure 6 41 Figure 6 42 Figure 6 43 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure 7 7 Figure 7 8 Figure 7 9 Figure 7 10 Figure 7 11 Figure 7 12 Figure 7 13 Figure A 1 Figure A 2 Figure A 3 Figure A 4 Figure A 5 Figure A 6 Figure A 7 Figure B 1 Figure B 2 Figure B 3 Figure B 4 Figure B 5 Figure B 6 xiv Data Acquisition Data spacing selection ccccccssecsseceseceteceteceeeeeeeeeeeeeeeeeeneeaes 6 24 Data Acquisition Number of Fields and Field Increment oococoncninnncncnnnmm 6 25 Data Acquisition Keep and Approximate Fields Settid8S ooooiocncnicnncncinnnnmcmm 6 25 Advanced Settings Advanced tab Require sweep and SO OM ocooococccoccconaninnnonnnnnos 6 26 Setup tab of the sequence mode VSM Moment versus Temperature dialog 6 28 Advanced tab of the sequence mode VSM Moment versus Temperature dialog 6 28 Temperature Control section of the sequence mode VSM Moment versus Temperature dialog oooonnonincninnononcnonnconnconnconncnnncnnnonoro 6 28 Data Acquisition section of the sequence mode VSM Moment versus Temperature dialog
158. nce Commands bar This command does not appear in the dropdown View menu until you have activated the Sequence Editor 3 You can also click on the New Sequence File button on the MultiVu toolbar 6 18 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 Section 6 7 VSM Software Sequence Mode VSM Adv Measure Command 6 6 3 Inserting Sequence Commands 1 In the Sequence Editor select the command line where you would like your command inserted For example to place a command before the End Sequence command shown in Figure 6 24 select the End Sequence command 2 In the Sequence Commands bar select and double click on the command that you want inserted A dialog box will open so that you can set the command parameters The panels and settings of the dialog are similar to those for the comparable dialogs that you open through the VSM Control Center and the dropdown menus in MultiVu e g the immediate mode VSM Measurement dialog 3 When you have specified the relevant parameters click on the OK button This button places the sequence command into the sequence file for execution when the file is run Important The system does not perform the sequence measurement when you click on the OK button in the sequence dialog The OK button only inserts a command to perform such a measurement into the sequence file The specified measurement will be performed when the sequence is run and that specific line in t
159. ncos A 7 NS SN A 7 A42 Single Guide Hole o a A 7 AA OD CAN ConmectOrincs sxiaxcettezes aa a aii A 8 APPENDIX B Model CM B VSM Detection MOdulle cccsccscsscssssecccssccssscccsssseccssssscessscsessssecsseseees B 1 Bek Introduction sses O B 1 B 2 Functional Overvie Wannee tas ia adn rd tada B 1 B 2 1 Functional Block Diagrami cirenean a ae a B 2 B 2 2 Specificatii ons adi a N aE EEES B 3 Quantum Design PPMS VSM Option User s Manual Rev A3 ix January 2008 Contents Table of Contents B 3 Model CM B Detection Module Front Panel ooconncnnonoconcninnnncnannnonocnnnonnnnn nono nocnnnnanananonenos B 3 Bedell Indicator LEDS La a dd tdo linda B 3 B 3 2 Connectors and Pinout Tables connnnnnccconccononanonananonccnnnononononecnononanan anno nococnnnnananonenos B 4 B 3 2 1 JB 1 Motor Sync Connector 0 cccccceccscceececseeceeneeceeeeeceeeeeaecseacecseeeecsaeeeeaeeesaeeees B 4 B 3 2 2 JB 2Montor BNC liliana B 4 B 3 2 3 JB 3 Preamp Connector aiseee inepe iaaea e ai Anea eea iaa ra EAE NETAS ANETA B 5 B 4 Model CM B Detection Module Rear Panel occcnnnnnnononononicnnncnnananonoccconanananononoccnnnannnanncnos B 6 B 4 1 Address Selector cccceccccccsccccssssssssscesccscessesssescescesceesessaesessescsesesssauseescsseesenseasees B 6 B 4 2 Gude A EN B 6 B 4 3 OD CAN Connector circa ill B 7 IN A A E EEEE E EE ESEA G 1 INDEX opnaa eana a aAA NA aAa SA ANEAN EA NNE EEEN OTN EEA E A I
160. nennnnnnnnnns 6 17 7 8 7 9 Deactivate Option 2 22 6 3 6 4 definition ComMerntS n aa iaa 7 7 data file fields rnense 7 5 JOSSA ea eestontneceestetieeete sts G 1 G 4 detection coils See coilset puck detection module See Model CM B VSM detection module dialog Chamber atian 2 5 2 6 2 15 Configure VSM System 2 12 2 13 2 18 Field ennen E 2 5 2 15 Install Remove Sample Wizard 2 19 2 22 4 6 4 12 4 17 4 19 6 6 Index 1 January 2008 Index Option Manager 2 11 2 17 2 22 4 5 6 3 6 4 PPMS costa 4 16 PPMS Data Logging 4 15 4 16 6 16 Sample Properties 4 9 6 11 6 12 Select a Sequence File 7 8 Sequence Editor 6 3 6 18 6 19 Specify Sample Location 6 6 Temperature System 2 4 2 5 2 14 VSM Center Sample 6 7 VSM Center Sample Sequence 6 21 VSM Change Datafile 7 9 VSM Control Center 2 11 2 12 2 17 2 18 2 22 4 5 6 3 6 4 6 8 6 16 G 4 VSM Datafile Comment 6 8 7 7 7 8 VSM Datafile Title 4 9 VSM Install Remove Sample Wizard 2 20 2 22 4 6 4 12 4 17 4 19 VSM Measurement 4 3 4 12 4 16 6 7 6 13 6 16 6 19 6 21 VSM Moment versus Field 6 22 6 27 VSM Moment versus Temperature 6 27 6 32 VSM PpmsMU 0000
161. new vsm6 dat 51 x Install Data File Sample Advanced Simulation Chamber Status 305 00K Stable Sealed Configure VSM System Install Remove Sample Status Measure Help Extended purge operation completed Figure 4 15B Appearance of the Install tab after completion of an extended purge 4 4 4 4 1 4 12 18 You can now set up the system to perform sample measurements Taking Immediate Mode VSM Measurements After the sample has been installed and the position of the sample has been specified you can perform VSM measurements by using immediate mode commands e g from command buttons or dropdown menus or by constructing sequence files This section focuses on the use of immediate mode commands to specify and perform VSM measurements Chapter 6 describes how you can use sequence commands In immediate mode the primary measurement process uses the Measure command button to set the measurement parameters such as whether the measurements are single or continuous the interval between measurements and the peak vibration amplitude of a sample during a measurement Measure Command and VSM Measurement Dialog To specify parameters for VSM measurements click on the Measure button which is located just above the Status area in the VSM Control Center e g Figures 4 15A and 4 15B The Measure button opens the VSM Measurement dialog which consists of the Settings Centering and Advanced
162. ng operations the system will automatically trigger a touchdown operation Use a value of zero 0 if the amount of field change should never trigger a touchdown e Delta Temperature is the maximum allowed temperature change in degrees Kelvin between touchdown operations For example if this is set to 20 K and the temperature has changed by more than 20 K without any manual or automatic centering operations the system will automatically trigger a touchdown operation Use a value of zero 0 if the amount of temperature change should never trigger a touchdown 4You might occasionally find that you prefer to disable automatic touchdowns If so please review Section 4 2 1 2 5 You can do this periodically by selecting Measure gt gt VSM Center Sample from the main MultiVu dropdown menu or by inserting the Center Sample sequence command into a sequence file that is run during the measurements as explained in Chapter 6 4 14 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 4 Taking VSM Measurements Taking Immediate Mode VSM Measurements 4 4 2 3 ADVANCED TAB The Advanced tab of the VSM Measurement dialog Figure 4 18 contains settings that you can typically ignore as there are default values However the Excitation Parameters Ranging and PPMS Data Logging options offer additional control over your measurements as explained below Chapter 6 explains these settings in greater detai
163. ng time of 1 second the system will use an internal averaging time of 0 995 second 40 whole cycles divided by 40 2 Hz o Logging Interval is the amount of time that elapses between recorded measurements in seconds If you set Logging Interval to a value less than Averaging Time then one data point will be displayed and written to the data file every Averaging Time seconds 6 5 3 4 VSM MEASUREMENT DIALOG CENTERING TAB The Centering tab Figure 6 20 displays the automatic centering settings that are in effect Normally you will not need to adjust these settings The options on the left side of the VSM Centering tab Do Touchdown Centering at Intervals Delta Time Delta Field and Delta Temperature and No Automatic Centering are used to enable and set up automatic touchdown operations or to disable them To change the automatic centering options select the appropriate radio button SM Measurement fe ES Settings Centering Advanced Last Measurement gt Temperature K Field 2 De Delta Field Moment k mi ao AE No Automatic Centering Start Pause Close Help Figure 6 20 Centering tab in the VSM Measurement dialog Do Touchdown Centering at Intervals When you enable automatic touchdowns by selecting Do Touchdown Centering at Intervals set the Delta intervals according to the definitions below o Delta Time is the maximum allowed time interval in minutes between touchdown op
164. nnconnccnnoconocononos 6 15 6 6 Overview of Sequence Mode Commands cccccecssecsseesseescecseeessecsseceseceseseeeseseesseesseeeaeenaes 6 17 6 6 1 Opening and Creating Sequence Files cceccseeseesseeneeenseessecesecesecnsecseeseeeeeeeeeneenaes 6 17 6 6 2 Using the Sequence Editor and Commands Bat cccccccscesseceseceteceteceseceeeeseeeeseeeeneennes 6 18 6 6 3 Inserting Sequence Commands cccesccesccesssessceesceeeeeeeeeeseeeseeeaecesecesecsseeseeseeeseeeeeneennes 6 19 6 7 Sequence Mode VSM Adv Measure Command ccccccccsseesseceeceeceseeneeeseeseeeeneeenneennes 6 19 6 7 1 Sequence Mode VSM Measurement Dialog cccccccsscesseceteceteceseceeeceseeeseeeeeeneeesaes 6 19 6 7 1 1 Sequence Mode VSM Measurement Dialog Settings Tab oooonnonnnnnnnn 6 20 6 7 1 2 Sequence Mode VSM Measurement Dialog Centering Tab eects 6 20 6 7 1 3 Sequence Mode VSM Measurement Dialog Advanced Tab ooocoonnnnncnn 6 20 6 7 2 Summary Setting up a Sequence Mode VSM Adv Measure Command 006 6 21 6 8 Sequence Mode VSM Center Sample Command 00 cccccccsseesseceteeeeeeeeeeeeeeeseesseeeseeeeeesaes 6 21 6 9 Sequence Mode VSM Moment vs Field Command 0 ccccccseceseceteceneceseceseeeseeeeeeeeesaes 6 22 6 9 1 Sequence Mode VSM Moment Versus Field Dialog ooonoonnnnnnnnnncnnncnncnoncronrnoonnos 6 22 6 9 2 Sequence Mode VSM Moment versus Field Dialog Setup Tab oooco
165. nnnonnnnnnnnnnnmmm 6 23 6 9 2 1 Field Sequence Sets iii ia 6 23 6 9 2 2 Field Control Settings oia iii iberia aiii a 6 23 6 9 2 3 Data Acquisition Settings ccccccccsccssecseceesceeeceeeeeeseceseeeseeeseeeseecsaecsecnseenseeeaeens 6 24 6 9 2 4 Approximate Piel coccion a tibia dict 6 25 092S MESA nin 6 26 6 9 3 Sequence Mode VSM Moment versus Field Dialog Advanced Tab ooonconcccinnnin 6 26 6 9 3 1 A NN 6 26 E Ranging Settings A Ea e E e Teo tai 6 26 6 9 3 3 PPMS Data Logging SettidgS ooooonnncnonononcconononocononanonanonnnnonn nono nooo nconnnon nono nncananns 6 26 6 9 3 4 Advanced Settings ccccccccsscsseceseceseceseceeeceeecseeeeeseeeseeeseeeseeessecsaecnseceseenseeeaeees 6 26 0030 EXCItation Parameters cat 6 27 6 10 Sequence Mode VSM Moment vs Temp Command ooonocccoccnonanonnnonnnoncconccon ccoo nono noconocinonos 6 27 6 10 1 Sequence Mode VSM Moment versus Temperature Dialog oononinncinconoconocononocononos 6 27 6 10 2 Sequence Mode VSM Moment versus Temperature Dialog Setup Tab 6 28 6 10 2 1 Temperature Control Settings ooocononnnoonnoonnooncnononononanonnn nono nono noonncon ccoo nono nanonanns 6 28 6 10 2 2 Data Acquisition Settings cccccccecscesscessseeseeescecseeeeecsseceecnseceseeseeeseeeeeeeseneeesees 6 29 6 10 2 3 Approx Temperatures eecccccscceesseceeececeeceesaecseneeceeeeesaeceeaeecseneecaeeseaaeeneateees 6 31 6 1 0274 State digs oi onae
166. ns and cautions in the Model 1000 Modular Control System User s Manual before proceeding with the module installation 1 Turn off the power to the Model 1000 and disconnect the power cord 2 Open the lid on the Model 1000 3 Remove the cover plate for two module bays one from the front row and one from the back row as shown in Figure 1 6 of the Model 1000 Modular Control System User s Manual The back row bay will be used for the Model CM A motor control module Important The back row bays are designed for modules that have high power requirements such as the motor control module 4 Carefully insert the modules into the module bays e Carefully slide the Model CM B VSM detection module 4101 150 into the bay in the front row until it is firmly seated e Gently tighten the securing screw only until it is finger tight The faceplate of the module should be flush with the surrounding plates e Carefully slide the Model CM A motor control module 4101 100 into the back row bay e Gently tighten the securing screw only until it is finger tight The faceplate of the module should be flush with the surrounding plates 4 Connect the VSM motor module sync cable 3096 400 between the two modules as shown in Figures 2 1 and 2 11 5 Reconnect the power cord and turn on the power to the Model 1000 6 Verify that both the PWR and COP CANopen Protocol indicator LEDs on both modules are green they might be red when the power is
167. nstrument gt gt Chamber e In the Chamber dialog box click on the Purge Seal button 6 The base PPMS measurement system is now ready for you to install a different option 3 See Footnote 1 Quantum Design PPMS VSM Option User s Manual Rev A3 2 23 January 2008 C H APTER 3 Sample Preparation and Mounting 3 1 Introduction This chapter contains the following information o Section 3 2 discusses constraints on the o Section 3 3 explains how to mount samples that can be measured with the samples for measurement with the PPMS PPMS VSM option VSM option 3 2 Sample Properties The quality of your VSM measurement results will be affected by the dimensions and shape of the sample and the size of its magnetic moment 3 2 1 Size and Shape The geometry of the detection coils in the PPMS VSM constrains the dimensions of samples that can be measured Figure 5 4 gives the dimensions of a standard coilset puck In order for the sample and sample holder to fit into the detection coils their diameter must be less than 6 35 mm 0 25 inches Furthermore accurate results require samples that have a small vertical size compared to the baseline dimension of the detection coils For the standard coilset puck this baseline is 7 11 mm 0 280 inches In practice a cylindrical sample in the shape of the included Palladium standard sample is close to ideal Table 3 1 shows the calculated effect of the sample length and diameter on the rep
168. nt ceeeee 7 7 Moment vs Field 6 22 6 27 Moment vs Temp 2 05 6 27 6 32 New Datafile 7 8 7 9 Sequence Commands bar 6 18 6 19 6 21 7 7 Sequence Editor 6 3 6 18 6 19 sequence mode 066 4 3 6 3 6 17 6 32 serial number puck locatione snn ds 2 6 5 4 USING rR 2 12 2 13 2 16 2 18 Settings tab 4 12 4 13 6 13 6 19 6 20 shipping plug ccceeeceeeeee 2 8 2 9 5 2 Shutdown eeaeee 2 21 2 22 4 18 Specify Sample Location dialog 6 6 stabilizer post 2 7 2 9 2 23 5 5 and Safety coocoocococccccccccccacinaanononnnnnnnns 2 7 2 17 standard coilset See coilset puck Start End temperature 6 29 6 30 Start Reconfigure radio button 6 20 Start Stop toggle button 4 13 4 16 6 13 Stat s ii ee A a 7 2 Stop radio button 2 0 00 eee eee 6 20 synchronous detection 1 3 4 1 4 3 5 9 5 10 A 1 B 1 T target line See sample installation Temperature System dialog 2 4 2 5 2 14 6 3 Temperature panel MultiVu 6 2 6 3 theory of operation See measurement theory touchdown 3 4 4 1 4 3 4 5 4 11 4 14 5 8 6 14 6 15 6 21 6 26 6 31 G 3 touchdown operation See centering operation touchdown position See centering operation transport
169. nterprets the raw encoder signals from the VSM linear motor transport The VSM detection module detects the in phase and quadrature phase signals from the encoder and from the amplified voltage from the pickup coil These signals are averaged and sent over the CAN bus to the VSM application running on the PC Chapter 5 describes the hardware components of the Quantum Design PPMS VSM option in more detail Quantum Design PPMS VSM Option User s Manual Rev A3 1 3 January 2008 Section 1 4 Chapter 1 Safety Precautions Introduction to the VSM Option 1 4 Safety Precautions WARNING The VSM option is used in conjunction with the Physical Property Measurement System PPMS so you should be aware of the safety considerations for both pieces of equipment PPMS related safety precautions include those for the use of superconducting magnets and for the use of cryogenic liquids as is reviewed below and in the Physical Property Measurement System Hardware Manual Above all Quantum Design and its staff ask that you use standard safe laboratory procedures lt Use common sense Pay attention to the system s state and your surroundings If the behavior of the system appears abnormal something may be wrong with it Investigate and if necessary take appropriate action Supervise inexperienced users and train them in general electrical safety procedures The VSM and PPMS have safety features to prevent acci
170. nual Rev A3 January 2008 Quantum Design Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 6 16 Figure 6 17 Figure 6 18 Figure 6 19 Figure 6 20 Figure 6 21 Figure 6 22 Figure 6 23 Figure 6 24 Figure 6 25 Figure 6 26 Figure 6 27 Figure 6 28 Figure 6 29 Figure 6 30 Figure 6 31 Figure 6 32 Figure 6 33 Quantum Design Contents Table of Figures The MultiVu software application window and the View gt gt Status Bar dropdown Menu ccccccsseeseesseesteeeecesecesecnseeneeeeeeeeneeeaes 6 2 The MultiVu Status Bar and the Sequence Temperature Field and Chamber Sections cccsccsseesteceteceseeeseceeeeeeeeeseeeees 6 2 Using the MultiVu dropdown Utilities menu and Option Manager to activate the VSM Option ccccecccesssesscsssceseeeeeeeseeeseeessecsaecaecesecnseeneenseenaes 6 3 The MultiVu window and the VSM Control Center VSM SIM including the Install tab the VSM Status area and the MultiVu Status bar 6 4 The MultiVu window and the View dropdown menu showing VSM immediate mode commands ccsccesccessceseceeeeeeeeeteeeeeenseesees 6 5 The MultiVu window and the Sample dropdown menu showing VSM immediate mode commands csccesccesseeseceeeeeeeeeeeeneeeneeensees 6 5 The MultiVu window the Sam
171. on Press Next to install new sample Or Press Shutdown to remove sample and turn off transport Shutdown F Use Extended Purge lt lt Back Cancel Figure 2 23B VSM Install Remove Sample Wizard dialog page 2 Install or remove sample 6 Remove the sample rod and replace the cover on the linear motor transport 7 In page 2 of the VSM Install Remove Sample Wizard click on the Shutdown button below the Instructions area If the system detects that the sample rod is present a popup dialog will open instructing you to remove the sample rod before you shut down the transport Figure 2 24 Ppmsmvu ee You must remove the sample rod before shutting the transport down Figure 2 24 VSM Ppmsmvu popup dialog with shutdown instructions CAUTION Verify that you have removed the sample rod before continuing 8 Ifthe sample rod has been properly removed the Instructions area will first indicate that the transport is being moved into the shutdown position Figure 2 25A A short time later the Instructions area will indicate that the transport has been shut down Figure 2 25B Quantum Design PPMS VSM Option User s Manual Rev A3 2 21 January 2008 Section 2 4 Chapter 2 Removing the VSM Option Installing and Removing the VSM Option SM Install Remove Sample Wizard Figure 2 25A VSM Install Remove Sample dialog page 3 Moving the transport into the shutdown position YSM Ins
172. on 2 2 1 Install the Modular Control System and CAN Network Adapter You will use the instructions in this section only if a Model 1000 modular control system and the driver software have not yet been installed on your PPMS and PC If your system already has been configured to use Quantum Design modules you can go to Section 2 2 2 To install the Model 1000 CAN network adapter and CAN Manager driver software refer to the Model 1000 Modular Control System User s Manual System Verification After you have completed installation of the Model 1000 and other components perform a verification of the system 1 Verify that the power cable has been connected to the Model 1000 and it has been turned on 2 Verify that the power LED on the front of the Model 1000 is lit green Verify that the Model 1000 is connected to the CAN adapter on the PC via the CAN network cable Quantum Design PPMS VSM Option User s Manual Rev A3 2 3 January 2008 Section 2 2 Chapter 2 Initial Installation of the Hardware and Software Installing and Removing the VSM Option 2 2 2 2 2 3 2 4 Insert the Control Modules 4101 150 and 4101 100 You will use the instructions in this section only if the Model CM B 4101 150 and the Model CM A 4101 100 control modules have not been installed in the Model 1000 already e g installed at the factory If the modules were installed at the factory you can go to Section 22 3 Refer to the instructio
173. on tool as illustrated in Figure 2 6 MOUNTING RING FOR PUCK INSERTION TOOL PUCK EXTRACTOR p l y COILSET PUCK go OO QO El E PROBE HEAD C COILSET SERIAL NUMBER DEWAR REQUIRED BY SOFTWARE Noe Ss Figure 2 5 Coilset puck 4096 204 with arrows to coilset serial Figure 2 6 Installing the VSM coilset puck number and to mounting ring for attaching the puck insertion tool with the puck insertion tool The puck insertion tool is also referred to as the puck extraction tool the sample holder tool and the sample insertion sample extraction tool depending on context 2 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 2 Installing and Removing the VSM Option Initial Installation ofthe Hardware and Software 2 2 5 Insert the Sample Tube The sample tube contains low friction bearing sleeves to center the sample rod in the bore of the coilset Figure 2 7 shows the sample tube assembly where you can see that the top of the sample tube assembly includes an integrated centering ring and a stabilizer post When the sample tube has been inserted into the sample chamber the stabilizer post will extend into both the sample chamber and the extender tube flange on the VSM linear motor transport as is shown in Figure 2 10 The primary functions of the post are to act as a guide when the transport is inst
174. ononocononos 6 13 Centering tab in the VSM Measurement dialog ccccceesseessecstecseceseeeeeeeeeeeneeeees 6 14 Advanced tab in the VSM Measurement dialog ooooooccnnnnnnnnoocnnoncnnnonnnononoconocnonos 6 15 PPMS data logging dialog for selecting additional types of data to be collected 0 0 cc ceccescessceseceseeeeeeeseeeseeeseeeeeessecseceaeenseenaeens 6 16 Opening a sequence file by using the MultiVu dropdown File menu o 6 17 The MultiVu window the Sequence Editor and the Sequence Commands bar iii qa ca 6 18 VSM sequence mode Measurement dialog Settings tab ooonconncniocononcconocononos 6 20 VSM sequence mode Measurement dialog Centering tab oooooncnnnccinncninnconncnnncnss 6 20 VSM sequence mode Measurement dialog Advanced tab ooooonnccnnnconocononoconocononos 6 20 Sequence mode VSM Center Sample command VSM Center Sample Sequence pOPUP ocococccocononoconoconoconanonnnonnonan nono nono nconnconnnos 6 21 Setup tab of the sequence mode VSM Moment versus Field dialog 6 22 Advanced tab of the sequence mode VSM Moment versus Field dialog 6 22 Field Sequence section of the VSM Moment vs Field Setup tab Start End Quadrant de selected ocooononnccnnoncccononononnnonancconnnoonononnnnnonnnccnnconoss 6 23 Field Sequence section of VSM Moment vs Field Setup tab Start End Quadrant selected oooconnocnnnoccnonoccconnnononononnnccnnnnconno nono no nono ncco
175. or install sample 4 When the instructions are complete and indicate that the system has been prepared for the next step remove a sample rod or install a sample rod remove the sample rod and replace the cover on the linear motor transport CAUTION Verify that you have removed the sample rod before continuing 5 Click on the Shutdown button If the system detects the presence of the sample rod a popup dialog will open Figure 4 22 instructing you to remove the sample rod before you shut down the transport Verify that you have removed the sample rod and click on the OK button Ppmsmvu You must remove the sample rod before shutting the transport down Figure 4 22 Pomsmvu popup dialog with shutdown instructions 6 The OK button will return you to page 2 of the VSM Install wizard dialog where the Instructions area will first indicate that the transport is being moved into the shutdown position A short time later the Instructions area will indicate that the transport has been shut down Figure 4 23 4 18 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 4 Section 4 5 Taking VSM Measurements Removing a Sample SM Install Remove Sample Wizard JM Use Extended Purge Next gt gt Figure 4 23 The VSM Install wizard page 2 End wizard or install sample 7 To end the VSM Install wizard and stop taking measurements for a period click on the Cancel button 8 The VSM Install w
176. order to install the VSM option on the PPMS you must use the VSM specific components such as the VSM sample tube assembly with its integrated centering ring and stabilizer post This design is for your safety 7 Place the cap on the linear motor transport and purge and seal the PPMS sample chamber by using the Instrument gt gt Chamber dialog box see Section 2 3 1 and Figure 2 20 2 3 4 Connect the System Complete the electrical connections for the VSM option using Figure 2 11 for guidance After you have screwed in the connectors verify that the connections are firm 2 3 5 Activate the VSM Option After installing the VSM option you must activate it by using the MultiVu application software First you must deactivate any other measurement option as the PPMS can operate only one measurement option at a time 1 Start the PPMS MultiVu application if it is not already running 2 Open the Option Manager dialog box select Utilities gt gt Activate Option as shown in Figures 2 12 and 2 13 3 Deactivate any currently active option e Click on the name of the active option e Click on the Deactivate button The active option will move over to the Available Options list 4 Activate the VSM option e Click on VSM in the Available Options list e Click on the Activate button The VSM option will be moved to the Active Options list The VSM Control Center will open as soon as you have activated the VSM option When th
177. ort JA 1 on the Model CM A motor module The drive cable provides drive coil power to the linear motor transport position encoder read back to the module and serial communication between the linear motor transport and the module for diagnostic and configuration purposes Figure 5 10 Motor drive cable 3096 200 5 5 3 VSM Motor Sync Cable Figure 5 11 shows the VSM Motor sync cable 3096 400 which connects the SYNC port JA 3 on the Model CM A motor module to the SYNC port JB 1 on the Model CM B VSM detection module The cable provides high speed position encoder data to the VSM module so that it can perform synchronous detection Figure 5 11 VSM Motor sync cable 3096 400 Quantum Design PPMS VSM Option User s Manual Rev A3 5 9 January 2008 Section 5 5 Chapter 5 VSM Electronics VSM Hardware 5 5 4 Model CM A VSM Motor Module Figure 5 12 shows the Model CM A VSM motor module 4101 100 which provides all the power and logic that are necessary to drive the VSM linear motor transport All configuration and control of this module is through the VSM application software on the computer PC via the CAN bus connector on the back panel of the module See Appendix A for a detailed description of the functions of this module Figure 5 12 Model CM A VSM motor module 4101 100 5 5 5 Model CM B VSM Detection Module Figure 5 13 shows the Model CM B 4101 150 which performs the sync
178. orted sample moment The entries in the table were calculated for a vertically oriented cylindrical sample of length and diameter D Each entry corresponds to the ratio of the reported moment to the true moment For example for a sample of length L 5 0 mm and diameter D 2 0 mm measured with a peak amplitude A 2 0 mm the software will report a numerical result for the moment that is 0 9476 times the answer obtained for a pointlike sample of the same total moment Note that while the values in Table 3 1 have been normalized to 1 0000 for a pointlike sample the PPMS VSM system is calibrated with an approximately spherical sample of diameter 2 mm closely approximated by a cylinder of L 2 mm D 2 mm at a peak amplitude 4 1 0 mm Quantum Design PPMS VSM Option User s Manual Rev A3 3 1 January 2008 Section 3 2 Chapter 3 Sample Properties Sample Preparation and Mounting Table 3 1 Calculated ratio of the reported moment to the true moment for different size cylindrical samples and different amplitudes SAMPLE DIMENSIONS PEAK AMPLITUDE OF SAMPLE OSCILLATION Length L Diameter D oSm A Oia 2 0 mm mm mm 0 0 1 0000 1 0000 1 0000 0 1 1 0003 1 0005 1 0014 0 2 1 0007 1 0017 1 0053 0 3 1 0005 1 0026 1 0109 1 0 0 9996 0 9993 0 9981 1 1 0 9999 0 9999 0 9996 1 2 1 0007 1 0013 1 0037 1 3 1 0010 1 0028 1 0097 2 0 0 9978 0 9
179. ose data you should investigate the cause of the problem before using the system again VSM Control Center Tabs Each of the separate panels or tabs of the VSM Control Center organizes various related operations For example the Install tab organizes operations related to loading and unloading a sample such as moving the motor to its top position venting and purging the sample chamber and performing touchdown operations Quantum Design PPMS VSM Option User s Manual Rev A3 6 9 January 2008 Section 6 5 Chapter 6 VSM Control Center VSM Software 6 5 2 1 INSTALL TAB The Install tab Figure 6 13 has a Chamber Status area that reports the status of the sample chamber There are also Install Remove Sample and Configure VSM System buttons As is explained in Section 4 3 3 the Install Remove Sample button opens the VSM Install Remove Sample Wizard The wizard has a series of tabs and dialogs Figures 4 5 4 15 that organize the sample installation process from preparing the sample chamber and selecting the operational mode standard VSM or VSM oven to specifying the sample offset position and performing an automatic touchdown YSM SIM No Datafile 15 x Install Data File Sample Advanced Chamber Status 1 90K Stable Purged and sealed Install Remove Configure VSM Sample System Status Measure Help VSM Ready Figure 6 13 Install tab in the VSM Control Center 6 5 2
180. page 4 Sample offset graphed oooconncciccnnncnionnoononnnonnnos 4 10 The VSM Install wizard page 5 Reporting sample offset positi0N 4 11 The VSM Install wizard page 5 Performing a touchdown oooocococcconcconnnonnnannonass 4 11 The VSM Install wizard page 5 Finishing sample installation cscs 4 11 Installation completed after standard purge ccccccccssecsseceteceteceteceseeeeeeeeeeeeeeenes 4 11 Appearance of the Install tab when an extended purge has been initiated 4 12 Appearance of the Install tab after completion of an extended purge 4 12 VSM Measurement dialog Settings tab ooooonnoninncinccnococonoconnconaconoconnonononanonannnnnoo 4 13 VSM Measurement dialog Centering tab ccccecescessceeeceeeeeeeeeeseeeseeeeeeeeenaes 4 14 VSM Measurement dialog Advanced tab oooonconincciocononconaconnnonn nono nonn oran ncnn corn nnnnnos 4 15 Designating additional measurement data to be collected oooonconicnconicnininnnncn 4 16 The VSM Install wizard page 1 Initial instructions ooonccnnoncncninnnncnnnenncnnnnannos 4 17 The VSM Install wizard page 1 Chamber preparation ceeeecceseeseeeseeteeeeees 4 17 The VSM Install wizard page 1 Shutdown transport or install sample 4 18 Ppmsmvu popup dialog with shutdown instructions oooooconoocnnonnnonanononannnnnncnn ccoo 4 18 The VSM Install wizard page 2 End wizard or insta
181. panels or tabs Figures 4 16 4 18 The left side of each panel varies according to the dialog but the right side of each panel shows the same Last Measurement area and the bottom shows the same command buttons PPMS VSM Option User s Manual Rev A3 January 2008 Quantum Design Chapter 4 Section 4 4 Taking VSM Measurements Taking Immediate Mode VSM Measurements Last Measurement Area The right side of each panel consists of the Last Measurement area which displays the most recent measurement results The displayed data are also written to the open data file along with the data items that are defined in Chapter 7 Table 7 2 o Temperature represents the iojxi l i Last M average temperature during the Settings Centering Advanced f Last Measuremen gt Measure Type measurement in Kelvin E Temperature K o Field represents the average field in i Field E ioe oersted C Single Measurement Moment pe emu o Moment represents the average of Measurement Parameters Ab the moment over the averaging time Averaging p Std Eror 7 emu in emu Time ae Logging Interval fi 0 Ro o Moment Std Error represents the error on the mean that is the error bar on the reported moment Stat Pause _ Chose Hen Figure 4 16 VSM Measurement dialog Settings tab Command Buttons The Start Stop Pause Resume Close and Help command buttons are arranged across the bottom of all
182. ple dropdown menu and the VSM Install Remove Sample Wizard ooococnccnoconococonononaconnconnnancnan ccoo 6 6 The Specify Sample Location dialog that opens from the dropdown menu when you select Sample gt gt VSM Manual Locate ooooonnccinocionocococonnconacannnnanonoss 6 6 VSM immediate mode commands in the context of the MultiVu window and the Measure dropdown Menu cccccecsseeseeseessecssecesceeeeeeeeeeneeeseeeseeeaeesaes 6 7 The immediate mode VSM Center Sample popup cccccceseceteceteceteeeeeeeteeeeneeses 6 7 The immediate mode VSM Datafile Comment popup ccooocconncoonconnconnconnononocanocinonass 6 7 The VSM Control Center dialo8 ooooonnncninoninnnnnonnonnconncon cono noconoconoconnconnrnnr narrar 6 8 Install tab in the VSM Control Center coococcnccnnnncnnconononcnonnconononnnncononononncnnc no nonccnnnos 6 10 Data File tab in the VSM Control CenteT oooncoccnocinococonoconononncononononncnnorononncnnccnnonnnns 6 10 Designating an output data file oo eccecccecsseeseceseceeeceeeeeeeeeeseeeseeeseeesaecsaeenseenseees 6 11 Recording sample properties cccccccessecsseceteceseceeeceeecseceeeceeeseeeseeeeeeaaecnaeenseeeaeees 6 11 Sample tab in the VSM Control Center ccccccccsssceseceseceseceeecseeceeeeseeeeeeeeeneeenees 6 12 Advanced tab in the VSM Control Center 2 0 0 cceecceceseeseeesceeeeeeeneesecaeeeeeeeenaeenees 6 12 VSM Measurement dialog and the Settings tab oonooonnncnnnnicnnoccnnonnnannonn
183. plication Software Version 1 0 or newer This item might be pre installed This item is shipped in the VSM Option User s Kit This item might be pre installed in the Model 1000 Installation Process In the event that you are performing a complete initial installation 1 e no components were installed at the factory the process includes the following phases o installing and verifying the modular control system CAN network adapter and CAN driver software o inserting the control modules o warming the sample chamber setting the magnetic field to zero and venting the sample chamber o installing the VSM coilset puck o inserting the VSM sample tube 2 2 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 2 Installing and Removing the VSM Option Initial Installation ofthe Hardware and Software o mounting the linear motor transport o completing the electrical connections o installing the MultiVu software application and the VSM software o activating the VSM option o configuring the coilset The complete initial installation of the VSM option should take no longer than an hour In the event that you are performing a partial installation only check the instructions for each phase to be sure that you understand critical aspects of the process 096 30 SAMPLE TUBE A MODEL CM R VSM MODULE Figure 2 1 System components for PPMS VSM opti
184. port and press Close Chamber to obtain the initial touchdown position and purge the sample chamber ou may select a normal purge seal or an extended purge Close Chamber I Use Extended Purge Figure 4 11 The VSM Install wizard page 5 Reporting sample offset position Note the Use Extended Purge checkbox that has appeared next to the Close Chamber button Quantum Design staff strongly recommend that you use this option under the following circumstances you will perform low temperature measurements lt 270 K and the VSM hardware has been exposed to air for an extended time Under all other circumstances the standard PPMS purge routine is sufficient and it is more expedient than the extended purge 16 Place the cap on the linear motor transport and click on the Close Chamber button just below the Instructions area of Figure 4 11 e The text in the Instructions area will indicate that a touchdown is being performed Figure 4 12 and it will report on the process as it takes place e When the touchdown has been completed the Instructions area will say Sample Installation complete and Press Finish as shown in Figure 4 13 YSM Install Remove Sample Wizard F xj SM Install Remove Sample Wizard xj Chamber Status Chamber Status 305 K Stable Purged and sealed 305 K Stable Venting continuously Instructions Instructions Sample Installation complete Performing
185. pter is made of bearing grade plastic The upper end of this adapter has the lower centering slide integrated into it The lower end of the slide adapter is designed to mate with a threaded sample holder that you screw onto the bottom of the sample rod not shown in this figure 5 3 VSM Option User s Kit The VSM Option User s Kit contains miscellaneous hardware and supplies that you will use to mount samples and to verify the operation of the VSM The convenient portable toolbox see Figure 5 7 helps organize the items The kit includes the following contents o Quantum Design Sample Mounting Station The sample mounting station is used to mount samples at the correct location in the sample holder For more information about mounting samples see Figure 5 8 and Section 3 3 Sample Holders Sample holders are used to hold samples see Figure 5 8 the holders screw onto the bottom of the VSM sample rod Quantum Design has provided five paddle shaped sample holders and five trough shaped sample holders Calibration Sample The palladium calibration sample is used to calibrate the VSM option and to verify its accuracy Coilset Assembly The VSM coilset assembly is shipped as part of the VSM Option User s Kit PPMS VSM Option User s Manual Rev A3 5 7 January 2008 Chapter 5 Section 5 4 Sample Mounting Station VSM Hardware PALLADIUM CALIBRATION COILSET SAMPLE ASSEMBLY SAMPLE MOUNTING STATION PADDLE
186. ptions Avoragng Time sec o Continuous Measuring Figures 6 38 ce Number of 25 and 6 42 sets the VSM to take data in Lai teed Continuous Measuring mode refer to Temperaa Section 6 5 3 3 for more information on Continuous Measuring When you are Repetitions at each 1 not using Continuous Measuring you dinos must define the temperature change between measurements as is explained below in Number of Temperatures and Temperature Increment Phil Keep all measurements Figure 6 41 Data Acquisition section of the sequence mode VSM Moment versus Temperature dialog o Uniform Spacing in Temperature Figure 6 41 sets the VSM to take data at uniform temperature intervals o Uniform Spacing in Temperature 2 sets the VSM to take data at uniform temperature intervals with respect to the square of the temperature o Uniform Spacing in Temperature 1 2 sets the VSM to take data at uniform temperature intervals with respect to the square root of the temperature Quantum Design PPMS VSM Option User s Manual Rev A3 6 29 January 2008 Section 6 10 Chapter 6 Sequence Mode VSM Moment vs Temp Command VSM Software Uniform Spacing in 1 Temperature sets the VSM to take data at uniform temperature intervals with respect to the inverse of the temperature Uniform Spacing in Log Temperature sets the VSM to take data at uniform temperature intervals with respect to the logarithm of the temperature Averaging Time
187. r of 10 if the current peak signal exceeds 100 In some cases the Always Autorange setting might improve the signal to noise ratio However this setting could also lead to an increase in the number of range changes and a corresponding drop in data throughput o Fixed Range The system always uses the specified gain range 6 16 PPMS Data Logging m prms lolas In the PPMS Data Logging area of H ee ene IV Ten FF Brg Ch 1 Excitation F Map 21 the VSM Control Center Advanced r I BrgCh2 Resistance F Map 22 tab the Select ve button opens the ri I Big Ch 2 Excitation l Map 23 PPMS dialog Figure 6 22 which IZ PPMS Pressure Brg Ch 3 Resistance T Map 24 lists additional PPMS system data T Digital Inputs J Brg Ch 3 Excitation M Sample K items that you can choose to add to the FF DrCh1 Curent 7 Brg Ch 4 Resistance I Map 26 current data file These items are in T DrCht Power 7 Brg Ch 4 Excitation I Map 27 addition to the VSM data items that FF DrCh 2 Current J Sig Ch 1 Input Voltage TF Map 28 are typically included which are J Dr Ch 2 Power J Sig Ch 2 Input Voltage Map 29 summarized in Table 7 2 OK Close Help Figure 6 22 PPMS data logging dialog for selecting additional types of data to be collected PPMS VSM Option User s Manual Rev A3 January 2008 Quantum Design Chapter 6 Section 6 6 VSM Software Overview of Sequence Mode Commands 6 6 Overview of Sequence Mode Commands VSM
188. r s Kit o Chapter 6 describes the VSM application software and the use of immediate mode and sequence mode commands to take measurements Quantum Design PPMS VSM Option User s Manual Rev A3 xvii January 2008 Section P 4 Preface Conventions in the Manual Contents and Conventions o Appendix A provides a functional description of the Model CM A VSM motor module including diagrams and electrical specifications o Appendix B provides a functional description of the Model CM B VSM detection module including diagrams and electrical specifications o Glossary presents the terms typically used in the VSM manual o Index is a guide to information organized by key terms and phrases P 4 Conventions in the Manual File menu Bold text identifies the names of menus dialogs options buttons and panels used in the PPMS MultiVu and VSM software File gt gt Open The gt gt symbol indicates that you select multiple nested software options dat The Courier font indicates file and directory names and computer code Important Text is set off in this manner to signal essential information that is directly related to the completion of a task Note Text is set off in this manner to signal supplementary information about the current task the information may primarily apply in special circumstances CAUTION Text is set off in this manner to signal conditions that could result in loss of information or damage to equipment
189. ransport and its stand from the storage case and place them on a stable work surface keeping the motor in a vertical position 2 Verify that the bottom surface of the extender tube flange is clean If it is dusty or dirty clean it with a lint free cloth e g Kimwipe 3 Remove the VSM linear motor transport from the stand keeping it upright For example you can support the weight of the linear motor transport by gripping it with one hand on the top tube and the other hand on the extender tube flange 4 Place the VSM linear motor transport onto the top flange of the PPMS by orienting the electrical connector to the rear of the dewar the same direction as the other PPMS cables The linear motor transport should slide over the stabilizer post at the top of the VSM sample tube assembly 4096 301 Figure 2 10 shows where the stabilizer post emerges from the PPMS sample chamber the correct orientation of the linear motor transport and other relevant parts of the equipment 5 Verify that the integrated VSM centering ring is sandwiched snugly between the top flange of the PPMS and the linear motor transport 6 Attach the flange clamp to the flange Always use the flange clamp to hold the linear motor transport onto the post See Footnote 1 2 16 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 3 Installing and Removing the VSM Option Reconfiguring the PPMS for the VSM Option CAUTION In
190. ration 2 2 9 Configure the VSM System The serial number of the detection coilset puck identifies the calibration file that is used to calibrate the coilset You must verify that the serial number on the puck which you obtained in Section 2 2 4 matches the standard calibration file referenced in the software You will use the Configure VSM System dialogs to specify the puck serial number and test the VSM hardware 1 Locate the puck serial number that you obtained in Section 2 2 4 2 Click on the Configure VSM System button which is located on the right hand side of the Install tab Figure 2 14 3 Page 1 of the Configure VSM System dialog will open Figure 2 16 Note the text box where you will enter the serial number of the standard VSM calibration file and the View Diagram button at the top right hand side of the dialog Clicking on the View Diagram button will display the same diagram that is shown in Figure 2 11 2 12 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 2 Installing and Removing the VSM Option Initial Installation of the Hardware and Software Configure YSM System Figure 2 16 Configure VSM System dialog page 1 4 Verify that the number in the text box matches the serial number of your detection coilset puck If no number is displayed as above enter the serial number of your detection coilset puck in the text box 5 Click on the Next gt gt button at
191. s Approach Mode The Approach Mode dropdown menu bar lets you choose between Fast and No O Shoot temperature approach modes for each of the temperature set points in your measurement For more information on the Approach Mode see the PPMS MultiVu Application User s Manual Restore Defaults The Restore Defaults button resets everything in the dialog to the default settings 6 10 3 5 EXCITATION PARAMETERS Use the options in the Excitation Parameters subsection to set the drive variables for the VSM linear motor transport For more information on Excitation Parameters see Section 6 5 3 5 6 32 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 C H APTER 7 VSM Architecture and Data Files 7 1 Introduction This chapter contains the following information o Section 7 2 describes the software o Section 7 3 describes the fields in VSM architecture including the system file data files and how to create data files and structure as well as communications and add comments status 7 2 Architecture 7 2 1 System File Structure Table 7 1 shows the locations of the key VSM application files The program VsmMultiVu dl11 is launched when the option is activated Default program parameters are read from the vsm ini file and calibration data are read from files in the calibration directory Status messages that appear in the VSM Control Center are logged to VSMLog txt in plain text format Temporary graph data are stored i
192. set puck It contains two analog inputs for the synchronous detection current and voltage for a thermometer power for the preamp and serial communications to the serial ROM in the preamp box for storing calibration or configuration information DOS OSO OOOO OOO QOOOOOOOO OOO Q Le D5 DPD PASS B1 6 5 Figure B 4 JB 3 Preamp connector for the Model CM B VSM detection module Table B 4 JB 3 Preamp connector for the Model CM B VSM detection module PIN FUNCTION 3 Serial Com Select 4 Serial Com Data MOSI 5 Thermometer Current 6 Thermometer Voltage 9 15 V 10 Channel 1 Input 11 5 V 12 Channel 2 Input 13 Signal Ground 16 Serial Com Clock 17 Serial Com Data MISO 18 Thermometer Current 19 Thermometer Voltage 22 15V 23 Channel 1 Input 25 Channel 2 Input Quantum Design PPMS VSM Option User s Manual Rev A3 B 5 January 2008 Section B 4 Appendix B Model CM B Detection Module Rear Panel Model CM B VSM Detection Module B 4 Model CM B Detection Module Rear Panel The rear panel of the Model CM B VSM detection module contains an address selector two guide holes and the CAN connector through which the module sends and receives network data and receives power B 4 1 Address Selector Each module on the CAN bus must have a unique 5 bit binary address The s
193. sults of the active VSM session Important Monitor the size of VSMLog txt if you want to save the logged information because the software automatically trims the file when its size exceeds 5 MB Save VSMLog txt under a different name when the size nears 5 MB PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 7 Section 7 3 VSM Architecture and Data Files VSM Data Files e iii Pair 7 3 7 3 1 The Error Count popup Figure 7 3 captures error Enos 0 messages from the VSM option To see the Error Count select View gt gt VSM Error Count from the dropdown menus at the top of the MultiVu window Reset Figure 7 3 The Error Count popup VSM Data Files Data files have a dat file extension To save VSM measurement data you must designate and open a measurement data file before you start the measurement You designate data files by creating a new one or selecting a pre existing one as is explained in Section 7 3 4 Important To save or graph measurement data you must explicitly designate a data file before you begin to collect data In the event you do not designate a data file the measurement data will be lost Data File Headers The header of a data file e g Figure 7 4 contains information such as the title of the data set and the sample properties You have the opportunity to include this information when you create the file this is the only time you can add this informa
194. ta file For more information on PPMS Data Logging see Section 6 5 3 5 Advanced Settings 6 10 3 4 ADVANCED SETTINGS JV Require Sweep Mode For Continuous Acquisition The Advanced Settings subsection Wait Time At o E Figure 6 43 is a general section for Besni T estore controls that are rarely used Approach Mode Fast y Defaults Figure 6 43 Advanced Settings section Require sweep Wait Time and Approach Mode Quantum Design PPMS VSM Option User s Manual Rev A3 6 31 January 2008 Section 6 10 Chapter 6 Sequence Mode VSM Moment vs Temp Command VSM Software Require Sweep Mode For Continuous Acquisition The system will automatically activate the Require Sweep Mode For Continuous Acquisition option when Continuous Measurement data acquisition has been selected Note You can uncheck the box and use the Stabilize at each Temperature mode while you perform continuous measurements However be aware that if you measure continuously while the controller is stabilizing the temperature the amount of noise in the VSM data might increase Wait Time At Each Step The Wait Time At Each Step value sets the additional time in seconds that the system waits at each of the temperature set points This wait time is in addition to the amount of time it takes to do the required VSM measurements it is added before the VSM performs the measurements This setting has no effect if you have selected Sweep or Continuous Measuring mode
195. tall Remove Sample Wizard J Use Extended Purge Figure 2 25B VSM Install Remove Sample dialog page 3 Transport shutdown 9 To continue with the VSM removal process end the VSM Install Remove Sample Wizard by clicking on the Cancel button This button will close the install dialog and return you to the VSM Control Center and the Install tab Before you can remove the linear motor transport you must deactivate the VSM option as is explained in Section 2 4 2 2 4 2 Deactivate the VSM Option 1 Select Utilities gt gt Activate Option from the dropdown menu of the MultiVu window Figure 2 12 2 When the Option Manager dialog opens Figure 2 13 select VSM and click on the Deactivate button This will move the VSM option from the Active Options section of the dialog to the Available Options section The VSM Control Center and the VSM Log window will close but the MultiVu software application will remain open 3 Continue with the VSM removal procedures in Sections 2 4 3 2 4 4 2 22 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 2 Section 2 4 Installing and Removing the VSM Option Removing the VSM Option 2 4 3 Remove the VSM Linear Motor Transport CAUTION Quantum Design recommends that you have another person help you remove the VSM linear motor transport which is fragile bulky and moderately heavy about 10 kg or 22 Ib 1 Unplug the electrical connector from the back of the V
196. ter dialog box 6 5 1 2 BUTTONS Below the tabs a separate area contains the Measure and Help buttons The Measure button is used to open the dialogs for setting immediate mode VSM measurement parameters see Section 6 5 3 You will always see the Measure button in this area of the VSM Control Center so you can use it to set up measurements at any time 6 5 1 3 VSM STATUS AREA The state of the current VSM process is summarized in the VSM Status area or bar which is located just below the Measure button This area will show information about the VSM option that has been selected the progress of an ongoing measurement and the results of the last measurement The VSM Status bar appears under every tab in the VSM Control Center Each VSM status message is logged to the VSM Log file see Section 7 2 3 1 6 8 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software 6 5 2 Section 6 5 VSM Control Center Note The VSM Status area is separate and different from the MultiVu Status bar which is at the bottom of the MultiVu window You can see the difference between the two status areas in Figure 6 4 Warning and Error Messages The VSM Status bar also displays color coded warning and error messages to alert you to the possibility of a problem with any components of the system Table 6 1 summarizes the characteristics of warning and error messages Table 6 1 VSM warning and error messages
197. tering see Section 6 5 3 4 6 9 3 2 RANGING SETTINGS Use the Ranging section of the Advanced tab to set the way the system chooses the gain of the amplifiers in the VSM module during measurement For more information on Ranging see Section 6 5 3 5 6 9 3 3 PPMS DATA LOGGING SETTINGS The Select button in the PPMS Data Logging section opens the PPMS dialog Figure 6 22 so that you can select additional system information to be sent to the output data file For more information on PPMS Data Logging see Section 6 5 3 5 6 9 3 4 ADVANCED SETTINGS Advanced Settings The Advanced Settings subsection Figure IV Require Sweep Mode For Continuous Acquisition 6 37 contains settings that are rarely Wat Times gt 9g needed but they can provide extra control Restore over your measurements OO E cube Excitation Parameters Require Sweep Mode for Continuous Peak Amplitude 2 mm Acquisition Fremont jpo z he When you set Data Ac quisition to Maximum Acceleration 126 331 m sec 2 Continuous Measurement Section Maximum Moment 1046875 emu 6 9 2 3 the system automatically uses Sweep Mode and the check box next to Figure 6 37 Advanced Settings Advanced tab Require Sweep Mode For Continuous Require sweep Wait Time and Approach Mode settings Acquisition will be selected Although you can clear the check box and select the Driven at each field or Persistent at each field mode during continuous measurements be a
198. the bottom of the dialog box Page 2 of the Configure VSM System dialog Figure 2 17 will open showing the results of system tests to verify system operations Configure YSM System Figure 2 17 Configure VSM System dialog page 2 Testing calibration file 6 When the report in the VSM System Test Results area is complete and no errors are reported click on the Finish button The Configure VSM System dialog will close and you will be back at the VSM Control Center and the Install tab 7 Ifyou have completely followed the VSM hardware and software setup steps the PPMS is now ready for you to mount a sample install it in the PPMS and perform VSM measurements as is explained in Chapters 3 and 4 First please review Section 1 4 Safety Precautions for important information Quantum Design PPMS VSM Option User s Manual Rev A3 2 13 January 2008 Section 2 3 Chapter 2 Reconfiguring the PPMS for the VSM Option Installing and Removing the VSM Option 2 3 Reconfiguring the PPMS for the VSM Option You will use the procedures in this section whenever you re install the VSM option For example if you have been using the Heat Capacity option with the PPMS you would use the Section 2 3 procedures to reconfigure the PPMS to perform VSM measurements Many of the procedures used in initial installation are also used in re installation of the VSM option but some procedures apply only to initial installation or to re installation
199. tion 4 3 Taking VSM Measurements Installing a Sample Quantum Design e Ifyou have not already measured your sample offset position use the sample mounting station to obtain the sample offset from the end of the sample holder see Section 4 3 1 e Attach the sample holder to the sample rod e Remove the cap from the top of the VSM linear motor transport e Insert the sample rod with the attached sample holder into the sample access port until the magnetic lock at the top of the sample rod engages the magnetic lock ring in the linear motor transport Verify that the magnetic lock has engaged the magnetic lock ring Important The sample will be subject to vertical magnetic fields of up to approximately 200 gauss when it passes through the head If this is unacceptable for your samples please contact Customer Service at Quantum Design Click on the Next gt gt button at the bottom of the VSM Install wizard This will open page 2 of the VSM Install wizard Figure 4 7 in which you designate the type of measurement standard VSM or VSM Oven you will be taking Important If you have installed both the standard low temperature VSM option and the VSM Oven option you can come back to this page and change your selection at any point during the VSM Install wizard However if you want to change the operating mode after the VSM Install wizard has ended you must restart the wizard from the beginning SM Install Remove Sample Wizard x
200. tion User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software Quantum Design Section 6 5 VSM Control Center vs Select pata rie A Lookin Sj Data x eck Be Heat Capacity 4 AcrnsDefault 44 UploadPpmsData 4 heliumar i ttgt 4 vamDefault File name My Network P Files of type Data files dat y Cancel Figure 6 15 Designating an output data file To select an existing output data file place your cursor on the file name and click on the Open button When measurements are taken the new data will be appended to the existing file Important If you select an existing file that has the wrong type of format for example a data file for a different PPMS measurement option you will receive an error message To create a new output data file enter the new file name in the File name text box and click on the Open button The software will prompt you to specify the title of the data file which will be used for the graph of the data It will then open the VSM Sample Properties dialog Figure 6 16 The VSM Sample Properties dialog is for your notes about the sample The sample property information is optional as there are no fixed sample properties and the VSM software does not use the sample properties for any computations Sample property information is stored in the header of the measurement data file so you can specify it only when the data file is created and you cannot us
201. tion to the data file header Instead after a file has been created you can append comments see Section 7 3 5 210 x Header VSM Data File default extension dat Copyright c 2003 Quantum Design Inc All rights reserved TITLE Titanium 1 FILEOPENTIME 169547667 69 05 21 2003 8 34 am BYAPP VSM 1 0 1 0 NFO PPMS VSM Option Release 0 9 8 Build 2 APPNAME NFO 0 MOMENT_UNITS NFO Titanium oxide SAMPLE_MATERIAL NFO stock sample 1 SAMPLE_COMMENT NFO 001 SAMPLE_MASS NFO SAMPLE_VOLUME NFO SAMPLE_MOLECULAR_WEIGHT NFO SAMPLE_SIZE NFO irregular SAMPLE_SHAPE NFO 34 95 SAMPLE_OFFSET DATATYPE COMMENT 1 DATATYPE TIME 2 STARTUPAXIS X 2 STARTUPAXIS Y1 5 Data Comment Time Stamp sec Temperature K Magnetic Field Oe Moment emu M S y LA Figure 7 4 A Raw Data view of a VSM data file Contact Customer Service at Quantum Design in the event you would like further information about data recovery and storage techniques Quantum Design PPMS VSM Option User s Manual Rev A3 7 3 Jnauary 2008 Section 7 3 Chapter 7 VSM Data Files VSM Architecture and Data Files 7 3 2 Views of the Data You can view the data in an open file in several formats Figure 7 4 shows a Raw Data view and Figure 7 5 shows a Table view To access a data view open a data file and select View gt gt Raw Data or View gt gt Table from the dropdown menus at the top of the MultiVu window
202. tivate and deactivate the VSM option on your PPMS just like the other PPMS options The modularity of the design enables you to perform successive types of measurement with little additional effort For example you could follow state of the art VSM measurements with heat capacity measurements by inserting a different puck or probe The PPMS VSM is the first new measurement option from Quantum Design to use the next generation electronics architecture based on the CANopen networking protocol The VSM option includes the Model 1000 modular control system which is the heart of the new architecture Plug in modules including the Model CM A VSM motor module and the Model CM B VSM detection module provide option specific functionality This new modular architecture offers very high reliability as well as the ability to be expanded when you add options in the future 1 3 Theory of Operation The basic principle of operation for a vibrating sample magnetometer is that a changing magnetic flux will induce a voltage in a pickup coil The time dependent induced voltage is given by the following equation do yv col dt E ez dz dt 1 1 In equation 1 1 is the magnetic flux enclosed by the pickup coil z is the vertical position of the sample with respect to the coil and is time For a sinusoidally oscillating sample position the voltage is based on the following equation V oil 2afCmA sin 27ft 1 2 In equation 1 2 C is a
203. top Pause Resume and Close 6 5 3 1 VSM MEASUREMENT DIALOG BUTTONS o The Start Stop toggle button starts and stops the measurement process but it does not close the dialog o The Pause Resume toggle button only stops the system from performing measurements as the system continues to oscillate the sample and execute any scheduled automatic touchdown operations To restart the data output after a Pause click on the Resume Pause toggle button o The Close button closes the VSM Measurement dialog but it does not stop the measurement 6 5 3 2 VSM MEASUREMENT DIALOG LAST MEASUREMENT The VSM Measurement dialog is divided into two VSM Measurement Elolx main areas On the left side are the tabs with the Settings Centering Advanced Last Measuremen 5 1 1 1 gt Measure Type measurement settings On the right side is a Last i a A K Measurement area that displays the most recent c i Temperature Field Moment and Moment Std Field eo De Error data which are written to the open data file yo at Moment 77 emu o Temperature represents the average Measurement Parameters i A temperature during the measurement in Kelvin AEEA sikan E emu e Time f Ss o Field represents the average field in oersted Logging fo Interval ae o Moment represents the average of the moment over the averaging time in emu o Moment Std Error represents the error on the Stat Pase _ Chose _ ep
204. top radio buttons are new o When the Start Reconfigure sequence command is executed it initiates a VSM measurement with the parameters that are specified in the Settings Centering and Advanced tabs of the VSM Measurement dialog unless a VSM measurement is already running In the latter case the Start Reconfigure command will reconfigure the VSM measurement with the specified parameters and continue measurements o When the Stop sequence command is executed it halts data output and stops the oscillation of the sample This tab also has basic measurement parameters and options Measure Type Averaging Time and Logging Interval that are defined the same as they are in the immediate mode VSM Measurement dialogs Section 6 5 3 3 6 7 1 2 SEQUENCE MODE VSM MEASUREMENT DIALOG CENTERING TAB This Centering tab Figure 6 26 is the same as the immediate mode Centering panel and the options are defined the same as they are in the immediate mode panel see Section 6 5 3 4 6 7 1 3 SEQUENCE MODE VSM MEASUREMENT DIALOG ADVANCED TAB This Advanced tab Figure 6 27 is the same as the immediate mode Advanced panel and the options are defined the same as they are in the immediate mode panel see Section 6 5 3 5 Important Please read about the Peak Amplitude setting in Section 6 5 3 5 before you attempt to change it from the default 6 20 PPMS VSM Option User s Manual Rev A3 January 2008 Quantum Design Chapter 6 VSM Sof
205. tor linear See VSM linear motor transport head mounting Samples s s s 3 3 3 4 4 4 MultiVu software 2 10 2 12 4 2 4 5 6 1 6 3 6 5 6 7 6 9 O offset sample See sample offset operating principles See measurement theory optical linear encoder See VSM linear motor position encoder Option Manager 2 11 2 17 2 22 4 5 6 3 6 4 P Pause Resume toggle button 4 13 4 16 6 13 Peak Amplitude 4 15 6 15 6 20 pickup coils See coilset puck position encoder optical encoder See VSM linear motor position enconder PPMS Data Logging 4 15 4 16 6 15 6 16 6 21 6 26 6 31 PPMS dialog nenene 4 16 6 16 Ppmsmvu dialog oooococccio 2 21 4 18 preamp cable assembly See cables puck See coilset puck puck insertion extraction tool 2 6 2 16 5 3 Quantum Design PPMS VSM Option User s Manual Rev A3 Index Q QD module See module name e g Model CM A VSM motor module R Ranging setting 4 15 6 15 6 16 6 21 6 26 6 31 Reconfigure radio button See Start Reconfigure radio button reconfiguring the PPMS for the VSM 2 14 2 18 removing a sample 4 17 4 19 removing the VSM option 2 19 2 23 6 4 6 8 Resume See Pause Resume toggle button S Salely sateen lees 1 4 1 6 sample access port 2 8 4 7 5 2 G 3 CAPuiriias 2 8 2 17 4 7 4 11 5 1 5 2 G 1 sample
206. tor is for use by Quantum Design It can be configured to output signals for diagnostic purposes A 6 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Appendix B Section A 4 Model CM B VSM Detection Module Model CM A VSM Motor Module Rear Panel A 4 Model CM A VSM Motor Module Rear Panel The rear panel of the module contains an address selector a single guide hole and the CAN connector through which the module sends and receives network data and receives power A 4 1 Address Selector Each module on the CAN bus must have a unique 5 bit binary address The selector on the back panel is used to set the four least significant bits and an internal jumper sets the most significant bit If the selector is set to zero 0 the module uses its default address For a Model CM A VSM motor module the default address is 10 or equivalently A on the selector A 4 2 Single Guide Hole The single guide hole is used to align the connector with one of the back row high power receptacles on the Model 1000 modular control system Figure A 6 Rear panel of the Model CM A VSM motor module Quantum Design PPMS VSM Option User s Manual Rev A3 A 7 January 2008 Section A 4 Appendix B Model CM A VSM Motor Module Rear Panel Model CM B VSM Detection Module A 4 3 QD CAN Connector The QD CAN connector is the main communication connection for controlling the modu
207. touchdown please wait Press Finish T Use Extended Purge iii Eee za eos Figure 4 12 The VSM Install wizard page 5 Performing Figure 4 13 The VSM Install wizard page 5 a touchdown Finishing sample installation 17 Click on the Finish button at the bottom of the dialog Figure 4 13 ala This button returns you to the Install instal Data Fie Sample Advanced Simulation tab of the VSM Control Center Chemist Status Figure 4 14 which will display the rd ad e system temperature and other status information Note If you chose the extended purge Configure VSM option in Step 16 the Instructions l System area will reflect that process Figure 4 15A until the purge has been A ES Measue H completed Then the dialog shown in AAA Figure 4 15B will appear Figure 4 14 Installation completed after standard purge Quantum Design PPMS VSM Option User s Manual Rev A3 4 11 January 2008 Section 4 4 Taking Immediate Mode VSM Measurements SM SIM Install Data File Sample Advanced olx Chamber Status Performing extended purge operation 305 00K Stable Pumping continuously Install Remove Configure VSM Sample End Purge System Status Measure Help Pumping Chamber Figure 4 15A Appearance of the Install tab when an extended purge has been initiated Chapter 4 Taking VSM Measurements SM SIM
208. tware 6 7 2 6 8 Section 6 8 Sequence Mode VSM Center Sample Command Summary Setting up a Sequence Mode VSM Adv Measure Command Complete the following steps to set up a VSM measurement in sequence mode 1 Install a sample and designate an output data file 2 Designate create or open a sequence command file and start the sequence mode VSM Measurement dialog In the Sequence Commands bar open the Measurement and VSM command groups and double click on Adv Measure 3 Set the basic parameters for your measurements in the Settings tab of the VSM Measurement dialog 4 Use the Centering and Advanced tabs to make any desired changes to the automatic centering enabled or disabled option or settings and to the Excitation Parameters Ranging and PPMS Data Logging settings These measurement options are defined the same as they are in the immediate mode dialogs 5 When you have completed the measurement specifications click on the OK button at the bottom of the VSM Measurement dialog This will place the sequence command and its settings into the sequence file Sequence Mode VSM Center Sample Command If you choose not to use automatic centering you will need to perform centering operations by using the dropdown menu or by inserting centering operations into a sequence file As explained in Chapter 4 centering operations help ensure the accuracy of measurements keeping the centering position stable to within about 0 1
209. ufficiently close to the detection coils the imbalance will create a detected signal MOUNT SAMPLE HERE THREAD 10 32 Figure 3 1 Trough shaped sample holder 4096 391 Quantum Design PPMS VSM Option User s Manual Rev A3 3 3 January 2008 Section 3 3 Chapter 3 Mounting Samples Sample Preparation and Mounting 3 3 2 Accurate Sample Location The PPMS VSM system uses a touchdown technique for automatic centering of the sample in the detection coils This technique is described in detail in Chapter 4 To optimize the touchdown take special care with two steps in your preparations o Verify that the sample is mounted on the sample holder at 35 mm from the bottom of the sample holder Quantum Design has provided you with a special sample mounting fixture see Figures 4 2 and 5 8 for locating the sample o Verify that the end of the sample holder has a very well defined contact surface for performing the touchdown operation Quantum Design recommends that you locate the sample at an offset of 35 mm The height of the coilset is about 40 mm so the offset of 35 mm places the end of the sample holder 5 mm above the puck surface This location is far enough from the end of the sample holder so that end effects are minimal yet it safely allows up to 4 mm oscillation amplitude of the sample rod In addition use of this location exposes the sample to minimal variations in applied magnetic field because the sample is only moved 5 mm durin
210. ve made to the dialog SM Moment versus Field x SM Moment versus Field xj Setup Advanced Setup gt Centering gt Ranging 7 Do Touchdown Centering at Intervals Sticky Autorange m Field Sequence 5000 Hmax 0 Select Start End Quadrant 7 H iS ai Delta Time fo ie C Always Autorange i E min Fixed Range De Click and drag to choose start and end fields Delta Field fo Oe Field Controtp gt Approximate Fields Sweep Rate fi 0 De sec Driven at each field Persistent at each field Sweep End Mode Persistent Y Delta fio K Temperature gt PPMS Data Logging No Automatic Centering Select Advanced Settings Y Require Sweep Mode For Continuous Acquisition Wait Time At jo Each Step 0 Restore Approach Mode Linear y Defaults M Excitation Parameters Peak Amplitude 2 mm Frequency 40 yl Hz Maximum Acceleration 126 331 m sec Maximum Moment fi 0 46875 emu Data Acquisition Uniform Spacing in Log Field y Averaging Time fi sec Number of Fields E Min to Max Es Field increment 50 De Repetitions at fi each Field ear Time 00 42 h m Lines 61 i Keep all measurements OK Help a Figure 6 29 Setup tab of the sequence mode Figure 6 30 Advanced tab of the sequence mode 6 22 PPMS VSM Option User s Manual Rev
211. vicing to hazard replace fuses only with same type qualified personnel and rating of fuses for selected line voltage No operator serviceable parts For continued protection against fire Observe the following safety guidelines when you use your system To avoid damaging the system verify that the system power requirements match the alternating current AC power available at your location If the system has not been configured for the correct power available at your location contact your local service representative before you proceed with the system installation To prevent electrical shock verify that the equipment is properly grounded with three wire grounded plugs To prevent electrical shock unplug the system before you install it adjust it or service it Do not spill food or liquids on the system or its cables Refer to the section titled Safety Precautions before you install or operate this system Direct contact with cryogenic liquids materials recently removed from cryogenic liquids or exposure to the boil off gas can freeze skin or eyes almost instantly causing serious injuries similar to frostbite or burns Wear protective gear including clothing insulated gloves and safety eye protection when you handle cryogenic liquids Transfer liquid helium only in areas that have adequate ventilation and a supply of fresh air Helium gas can displace the air in a confined space or room resulting in asphyxiation di
212. view of VSM Measurements Taking VSM Measurements 4 2 1 1 THE TOUCHDOWN OPERATION Automatic sample centering is accomplished with the touchdown operation To perform a touchdown operation the linear motor transport lowers the sample rod until the end of the sample holder touches the puck surface see Figure 4 1 At this point the software knows the precise offset between the coilset and the sample based on the dimensions of the coilset and the location of the sample on the sample holder The linear motor transport then moves the center of the sample to the center of the coilset to continue measuring according to the following relation Measure location touchdown coilset height sample offset where coilset height H in Figure 5 4 is constant for a given puck SAMPLE ROD TOUCHDOWN CENTERED Figure 4 1 The touchdown centering operation 4 2 1 2 SCHEDULING TOUCHDOWN OPERATIONS The software usually performs touchdown operations automatically based on how rapidly the temperature and field are changing The system does not collect VSM data during the brief time about 20 s it takes to perform a touchdown operation In the event you want to control when the touchdown operation and its downtime occur you can disable automatic centering and perform the centering operations manually You can construct sequence files to pre program centering operations which Quantum Design staff recommend or you can issue immediate mode
213. want the system to use for each measurement it writes to the data file The averaging time can be as small as 2 cycles 0 05 sec for 40 Hz but Quantum Design staff recommend that you use values from 1 second to 10 seconds The system will round the entered value to the nearest cycle period For example if the VSM frequency is 40 2 Hz and you request an Quantum Design PPMS VSM Option User s Manual Rev A3 4 13 January 2008 Section 4 4 Taking Immediate Mode VSM Measurements Chapter 4 Taking VSM Measurements averaging time of 1 second the system will use an internal averaging time of 0 995 second 40 whole cycles divided by 40 2 Hz e Logging Interval is defined as the amount of time that elapses between recorded measurements in seconds If Logging Interval is set to less than Averaging Time then one data point will be displayed and written to the data file every Averaging Time number of seconds That is all the data will be saved The next sections describe the settings in the Centering and Advanced tabs The default values are likely to fit many of your measurement needs but you can adjust them whenever you need additional control 4 4 2 2 CENTERING TAB Use the settings on this panel to enable or disable automatic centering operations and to set the parameters for touchdown centering l To enable or disable automatic centering 01 click in the appropriate radio button in the Settings Centering Advanced Last Me
214. ware that these modes might increase the noise and introduce artifacts into your data 6 26 PPMS VSM Option User s Manual Rev A3 Quantum Design January 2008 Chapter 6 VSM Software 6 10 6 10 1 Section 6 10 Sequence Mode VSM Moment vs Temp Command Note If you measure continuously while the power supply stabilizes the magnetic field at each set point the noise level might increase temporarily introducing artifacts into the VSM data until the system can achieve field stability Wait Time At Each Step The Wait Time At Each Step text box is used to set the additional time in seconds that you want the system to wait at each field set point This wait time is in addition to the amount of time it takes for the required VSM measurements and it is added before the VSM performs the measurements The Wait Time At Each Step setting has no effect if you have selected Sweep or Continuous Measuring modes Approach Mode The Approach Mode dropdown menu bar lets you choose between Linear No O Shoot and Oscillate field approach modes for each of the magnetic field set points in your measurement For more information on Approach Mode see Chapter 6 of the PPMS MultiVu Application User s Manual We recommend Linear mode when your Data Acquisition setting is Continuous Measuring Restore Defaults The Restore Defaults button resets everything in the dialog to the default settings 6 9 3 5 EXCITATION PARAMETERS Use the options
215. weight of the linear motor transport by gripping it with one hand on the top tube and the other hand on the extender tube flange 7 Place the VSM linear motor transport onto the top flange of the PPMS by orienting the electrical connector to the rear of the dewar the same direction as the other PPMS cables The linear motor transport should slide over the stabilizer post at the top of the VSM sample tube assembly 4096 301 Figure 2 10 shows where the stabilizer post emerges from the PPMS sample chamber the correct orientation of the linear motor transport and other relevant parts of the equipment 8 Verify that the integrated VSM centering ring is sandwiched snugly between the top flange of the PPMS and the linear motor transport 9 Attach the flange clamp to the flange Always use the flange clamp to hold the linear motor transport onto the stabilizer post STABILIZER POST PREAMP PORT Figure 2 10 Installing the VSM linear motor transport on the top flange of the PPMS Quantum Design PPMS VSM Option User s Manual Rev A3 2 9 January 2008 Section 2 2 Chapter 2 Initial Installation of the Hardware and Software Installing and Removing the VSM Option 2 2 7 Complete the System Connections Using Figure 2 11 for guidance complete the electrical connections for the VSM option After you have attached the connectors verify that the connections are firm P
216. work adapter cable 3100 024 and software that are needed to connect the Model 1000 to the computer PC Quantum Design PPMS VSM Option User s Manual Rev A3 5 11 January 2008 CHAPTER 6 VSM Software 6 1 Introduction This chapter contains the following information o Section 6 2 introduces the software used to control the VSM option Section 6 3 describes the MultiVu window and how to access the VSM commands Section 6 4 describes the VSM specific dialogs and menu items in the MultiVu dropdown menus Section 6 5 describes the VSM Control Center and its components Section 6 6 briefly describes sequence mode commands the construction of sequence files and VSM specific sequence commands Section 6 7 explains use of the VSM sequence mode Adv Measure command Section 6 8 explains use of the VSM sequence mode Center Sample command Section 6 9 explains use of the VSM sequence mode Moment vs Field command Section 6 10 explains use of the VSM sequence mode Moment vs Temp command 6 2 Overview of the VSM Software All VSM measurements are accomplished using the VSM software application The application runs as an option within the windows based PPMS MultiVu application so VSM operations benefit from MultiVu functionality including real time graphing and automated measurements For example by embedding commands in a PPMS MultiVu sequence file you can set up the VSM system to take multiple temperature dep
217. xpected theoretical response curve to determine Coilset puck 4096 204 Puck containing one or two pickup coils arranged in any configuration for performing VSM measurements Centering slides Contact fingers Springy fingers at the bottom of the puck Cover plate Blank cover for empty module bays Dead reckoning A centering technique that is not based on a formal measurement one simply enters a target position for the motor and vibrates the sample about that point peo Coil on the armature inside the head that drives the vibrating motion Extender tube flange 4096 418 The portion of the head that sticks down from its body and has an NW40 O ring flange at the bottom Quantum Design PPMS VSM Option User s Manual Rev A3 G 1 January 2008 Glossary STANDARD TERM QD PART DEFINITION NUMBER Firmware Software and data stored in flash memory in a QD module Firmware controls the operation of the module and the interface to the PC Firmware is retained even when the system is turned off Firmware can only be changed by using a QD utility to download updates Flange clamp a PAU NWA40 plastic clamp Flexible coupling Flexible coupling 4096 366 366 Located Located below magnetic lock Located below magnetic lock lock Guide pin The alignment pin located at the back of the module bays These pins help align the CAN connector They also prevent a high power module from being plugged into a low power slot H
218. y 2008 2 15 Section 2 3 Chapter 2 Reconfiguring the PPMS for the VSM Option Installing and Removing the VSM Option 2 3 2 Install the VSM Coilset Puck and Insert the Sample Tube 1 Locate the serial number of the detection coilset puck 4096 204 as shown in Figure 2 5 This serial number will be used to identify the calibration data for the coilset in a later step 2 Using the illustrations in Figures 2 5 2 8 for guidance install the puck and sample tube e Insert the coilset into the PPMS sample chamber using the puck insertion tool Refer to the Physical Property Measurement System Hardware Manual for a detailed description of puck insertion and extraction e Verify that the standard centering ring has been removed from the top of the PPMS The VSM option has an integrated sample tube and centering ring assembly e Onthe VSM sample tube examine the O ring on the centering ring for dirt and dust If the ring is dirty clean it with a lint free cloth e g Kimwipe and lightly grease it with silicon vacuum grease e Carefully lower the VSM sample tube 4096 301 into the PPMS sample chamber until the centering ring seats onto the top flange of the PPMS 2 3 3 Install the VSM Linear Motor Transport CAUTION Quantum Design recommends that you have another person help you install the VSM linear motor transport which is fragile bulky and moderately heavy about 10 kg or 22 Ib 1 Remove the VSM linear motor t
219. zziness unconsciousness or death Keep this system away from radiators and heat sources Provide adequate ventilation to allow for cooling around the cabinet and computer equipment Refer to the manuals for the supplied computer and monitor for additional safety warnings and notices before you operate the system Regulatory Information o o This apparatus has been tested to the requirements of the EMC Directive 89 336 EEC This apparatus is defined as ISM Group 1 Class A and B equipment per EN 50011 1991 industrial and light industrial environment limits of radio frequency emission This apparatus has been tested to the requirement of the Low Voltage Directive 73 23 EEC See the EU Declaration of Conformity for additional regulatory information regarding your PPMS Quantum Design PPMS VSM Option User s Manual Rev A3 iii January 2008 CONTENTOS Table of Contents PREFACE Contents and Conventions caricia canedosnsandisvercnsncccshstessbseveaudaadees xvii PA Introduce dd xvil P 2 Scope of the Mal A ais xvil P 3 Contents of the Manuales donr aes cono nono nono E cnn n ran rn eE E ron nc E RANES xvil P 4 Conventions in the Manual isise een ie E ae e eai Eie e xviii CHAPTER 1 Introduction to the VSM Option s ssesssooesooesooesssessseessocssooesoossssossssessscsssoessoosssossssesssesssosss 1 1 1 1 Introductio erenn eee a e Ea ae E a a E eT o a iea ERE 1 1 1 2 Overview of the VSM Option cccccesccescssseees

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