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Electronic Instrumentation DPP-CI

1. DPP CI Control Software CAEN In Electronic Instrumentatio General KAWETU E Stats Output Logger Channel Settings For Channel 0 vy Gl gt General Settings Channel Enabled DC Offset oH Copy Settings Pulse Polarity NEGATIVE v DPP Settings Threshold LSB Gate ns Gate Offset ns Common Settings Self Trigger Baseline Mean 32 Pre Trigger Charge Sens Trigger Hold Off PON Poscicscone E 00s Waveform Ch0 1 Input 2 Baseline 3 Trigger 4 Gate 6 TRG HoldOff ADC counts 1 27983 1597 22 UM2089 DPP CI User Manual rev 1 45 CAEN Electronic Instrumentation Path3 Tab CHANNELS gt Section COMMON SETTINGS Action1 Set the minimum value allowed for the PRE TRIGGER value in the box menu according to the formula Gate Offset lt Pre Trigger 28ns In case of high frequency signals this ensures that the new acquisition window will start after the minimum allowed amount of time w DPP CI Control Software CAEN Q Electronic Instrumentatio General BO Oscilloscope Stats Output Logger Channel Settings For Channel 0 g General Settings Channel Enabled DC Offset of Copy Settings Pulse Polarity NEGATIVE v 15 5 ISB Common Settings Self Trigger ENABLED Baseline Mean Pre Trigger Charge Sens Trigger Hold Of
2. General Settings Channel Enabled ok Copy Settings Pulse Polarity NEGATIVE DPP Settings Threshold 100 LSB Common Settings Self Trigger ENABLED v Baseline Mean 8 Pre Trigger E 1 20 ns Charge Sens 40 v fc LSB Trigger Hold Off OF ns Tan oscinoscope vw 0MBs foo UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Action3 check the effect of the previous settings in the plot window gnuplot graph Waveform Ch0 2250 f 1 Input 2200 2150 w 2 a Oo O 5 2100 F Ed 2050 2000 0 0 2 0 4 06 08 1 12 14 1 6 1 20967 2027 25 us Note The plot above has been zoomed To do that right click on the plot in a point near the portion of the signal you L want to zoom then release the mouse button move to a point on the opposite corner and left click Press u key on the keyboard to un zoom or press a to auto scale Next step is to set the input signal baseline calculation Both the Threshold parameter i e the trigger threshold and the charge integration are referred to the baseline value The Control Software provides two options for setting the baseline e Baseline mean calculation where the DPP CI algorithm calculates online the input signal baseline through a mean filter over a number of samples set by the BASELINE MEAN parameter e Absolute baseline where a fixed baseli
3. O means an input pulse DC level set to half of the ADC dynamics i e 2048 counts for the 12 bit and 2 V input range DT5720 The value of 50 DC Offset 50 sets the DC level at the lower dynamics limit i e O counts while the value of 50 DC Offset 50 sets the DC level at the upper dynamics limit i e 4095 counts The real DC offset adjustment implemented in the DPP CI firmware is shown in Fig 5 4 in order to preserve from saturation the input signals near the dynamics boundaries setting the DC offset to 50 or 50 puts the signal baseline respectively a step up the upper boundary and a step under the lower boundary ideal real 50 2V ga i 0 I TT I a OV i 50 FE I I I 2 V i els Fig 5 4 Input signal DC offset adjustment description Action7 look at the DC level of the input pulse DC offset in your plot to check if an adjustment is needed according to the Digitizer s ADC dynamic range In the specific case we chose to set the DC offset around half the dynamics theoretically 2048 counts Path4 Tab CHANNELS gt Section GENERAL SETTINGS Action1 verify that the Channel Enabled box is checked Action2 type or set 0 in the DC OFFSET box menu w DPP CI Control Software CAEN Nn Electronic Instrumentatio General KS Ett Oscilloscope Stats Output Logger Channel Settings For Channel 0 fl gt
4. using the scroll menu box or the side bar Action2 check Channel Enabled so that the settings in the tab are active for the selected channel Action3 press the ACQUISITION button in the deep grey common bar at the bottom of the GUI e OFF acquisition is off e ON acquisition is on Check that the Run green LED on the Digitizer s front panel lights on DPP CI Control Software CAEN Nn Electronic Instrumentatio General SE GE Oscilloscope Channel Settings For Ete Channel 0 General Settings i Enabled i Copy Settings DPP Settings Threshold Gate Offset Common Settings Self Trigger Baseline Mean Pre Trigger Charge Sens Trigger Hold Off HOFF foscinoscope 00s a UM2089 DPP CI User Manual rev 1 29 CAEN Q Electronic Instrumentation Action4 set the PULSE POLARITY to Negative according to the polarity of the input signal from the detector Note The algorithm is internally designed to work with negative pulses When the analog input pulse is positive it is necessary to invert it before the DPP algorithms are applied The option PULSE POLARITY Positive enables the internal inversion of the pulse polarity Please notice that the inversion is applied to the DPP algorithms only while it doesn t affect the waveform recording both plots and output f
5. 1600 ns Analog Trace 1 Input Analog Trace 2 Baseline Digital Trace 1 Trigger Digital Trace 2 Gate Digital Trace 3 External TRG Digital Trace 4 Over Threshold fo 00MBs 005 Fig 7 8 Tab Oscilloscope The Oscilloscope Tab consists only of the Oscilloscope Plot section in which all the parameters for the signals visualization are set A maximum of six 6 traces can be simultaneously displayed for 720 series The Oscilloscope Plot section includes e Plot Display buttons enable disable the plot visualization and let the user visualize the waveforms continuously ON OFF or in single shots Single e Plot Mode check cells selects if the Waveform Wave or the Fast Fourier Transform FFT has to be visualized The FFT option uses only the signal in Analog Trace 1 e Active Plot Channel menu selects the channel whose signals are visualized Only one channel at a time can be plotted The selected channel has to be checked in the Channels Tab Trace Selection box that includes o Dual Trace checkbox when enabled the two Analog traces are shown in the plot with half number of sampling This is useful for choosing the right settings of the DPP parameters When disabled only the Analog Trace 1 is visualized with full number of samplings O Record Length box selects the length of the acquisition
6. CAENUpgrader page Unpack the installation package launch the setup file and complete the Installation wizard Run the CAENUpgrader GUI by one of the following options e The desktop icon for the program e The Quick Launch icon for the program e The jar file in the bin folder from the installation path on your host Select Upgrade Firmware in the Available actions scroll box menu of the Board Upgrade tab Select the model of your board in the Board Model scroll box menu Enter the cfa file in the Firmware binary file text box by the Browse button Set USB in the Connection Type scroll box menu Set 0 as Link number setting Check Standard Page in the Config Options Press the Upgrade button to perform the upload after few seconds a pop up message will inform you about the successful upgrade Power cycle the board UM2089 DPP CI User Manual rev 1 22 23 CAEN Electronic Instrumentation w CAEN Upgrader GUI Upgrade CAEN Front End Hardware CAEN Nn Electronic Instrumentation Board rr Bridge Upgrade Available actions Connection Type Config Options us Green Board Model LINK number amine Firmware binary file Board number 0 DPP Cl_rev_4 1_130 22 cfa fe Skip Verify Fig 5 3 CAENUpgrader settings for DPP Cl firmware upgrade Note that when running the DPP Cl Control Software the program checks for the firmware loaded in the targe
7. Digital Trace 2 Gate be be EEE Digital Trace 3 External TRG be bee Digital Trace 4 Over Threshold x oN 10 92 MBs 00s gnuplot graph Waveform Ch0 1 Input 2 Baseline 3 Trigger wo 35 ro o oO a lt x 1 05570 2405 84 You can check in the plot if the trigger is properly issued UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation 5 Set the parameters for the charge integration gate offset gate width Setting the GATE width enables the firmware to integrate the input pulse and calculate the charge Q We will increase the GATE width to integrate the whole width of the signal First enable the gate visualization in the oscilloscope plot Path1 Tab OSCILLOSCOPE gt Section OSCILLOSCOPE PLOT Action1 Enable DIGITAL TRACE 2 Gate With the default value of the gate the istogram plot will appear as in Fig DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels KORATI GEZ e slo Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channel CON Ringa Channel 1 Channel 2 Plot Mode Channel 3 Wave FFT Trace Settings Trace Selection Select Trace Digital Trace 2 Dual Trace Record Length 400 1600 ns 4 v Analog Trace 1 Inp
8. Digitizers VME models only PC gt PCI A2818 gt CONET gt Digitizers all models PC gt PCI A2818 gt CONET gt V2718 gt VME gt Digitizers VME models only PC gt PCle A3818 gt CONET gt Digitizers all models PC gt PCle A3818 gt CONET gt V2718 gt VME gt Digitizers VME models only CONET Chainable Optical NETwork indicates the CAEN proprietary protocol for communication on Optical Link Refer to RD15 for useful information CAENConm Library CONETZ2 Optical Link Fig 7 2 Libraries and drivers required for the DPP CI system UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Installation In order to manage with DPP CI system the host station needs either Windows or Linux OS and the third party software Java Runtime Environment 7 or later trademark of Oracle Inc downloadable from http www java com Linux users must also take care of proper installation of gnuplot graphical tool as well as of CAEN Libraries The latter can be downloaded from CAEN website login required before to download e Make sure that your hardware Digitizer and or Bridge or Controller is properly installed refer to the related User Manual for hardware installation instructions e Make sure you have installed the driver for your OS and for the communication to be used Driver installation packages are downloadable on CAEN website login required before to download as reported i
9. RD7 GD2783 First Installation Guide to Desktop Digitizers amp MCA RD8 GD2512 CAENUpgrader QuickStart Guide RD9 AN2086 Synchronization of a multi board acquisition system with CAEN digitizers RD10 UM2784 CAENDigitizer LabView User amp Reference Manual RD11 Technical Information Manual of V1718 and VX1718 VME USB2 0 Bridge RD12 Technical Information Manual of A3818 PCI Express Optical Link Controller RD13 Technical Information Manual of A2818 PCI Optical Link Controller RD14 UM1935 CAENComm User amp Reference Manual RD15 AN2472 CONET1 to CONET2 migration All documents can be downloaded from http www caen it csite LibrarySearch jsp CAEN S p A Via Vetraia 11 55049 Viareggio LU ITALY Tel 39 0584 388 398 Fax 39 0584 388 959 info caen it www caen it CAEN SpA 2015 Disclaimer No part of this manual may be reproduced in any form or by any means electronic mechanical recording or otherwise without the prior written permission of CAEN SpA The information contained herein has been carefully checked and is believed to be accurate however no responsibility is assumed for inaccuracies CAEN SpA reserves the right to modify its products specifications without giving any notice for up to date information please visit www caen it MADE IN ITALY We stress the fact that all the boards are made in Italy because in this globalized world where getting the lowest possible price for pro
10. 32 bit signed 16 bit BIT FORMAT UM2089 DPP CI User Manual rev 1 68 69 CAEN Electronic Instrumentation Events are then written consecutively in the format EVENT 1 EVENT 2 EVENT 3 EVENT 4 DATA Data saving starts stops by the DUMPING ON OFF button Binary writing is particularly efficient for high readout throughput e Energy Histogram checkbox saves the Energy Histogram data in a 2 column file where the first column is made of the x data values i e histogram bins always ADC counts and the second is the frequency for each event Data saving is performed by the DUMP button e Time Histogram checkbox saves the Time Histogram data in a 2 column file histogram bins as ADC counts on the first column and frequency values on the second Data saving is performed by the DUMP button For the Oscilloscope Mode only one option is enabled e Waves checkbox saves the samples of the digitised waveforms from all the enabled channels All digital probes that are enabled in the Oscilloscope Tab will be saved as well Data saving starts stops by the DUMPING ON OFF button Note Both for List and Waves dumping a warning message will appear if you are changing the prefix name while the data saving option is enabled see Fig 7 14 File name changed A data file with prefix dump_000 already exists in the specified directory lf you dont change the file prefix that file may be overridde
11. Channel Aggregate is composed by the set of Ne events where Ne is the programmable number of events contained in one aggregate see the previous section The structure of the Channel Aggregate for two events EVENT 0 and EVENT 1 is shown in Fig 4 2 where CHANNEL AGGREGATE DATA FORMAT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 BIT FI CHANNEL AGGREGATE SIZE in Iwords SIZE DT EQ ET EB ES Trg Md AP DP4 DP3 NUM SAMPLES 8 FORMAT TRIGGER TIME TAG DP4 DP3 DP2 DP1 S4 DP49DP39DP29DP 10 So DP4 DP3 DP23DP 13 S3 DP4DP3jDP2 DP 1 So oO Hr Z Lu gt Lu DP4n 1 oF foray DP1 1 Sra DP4 2 DP3n 2 DP2n 2DP1n 2 Sn 2 BASELINE Q TRIGGER TIME TAG DP4 DP3 DP2 DP1 S DP4 DP3 DP2 DP 19 So DP4 IDP3 DP23DP1 4 S3 DP4DP3DP2DP14 So Z L gt Lu DP4 1 DP3 1 DP2 1 DP 11 1 Sra DP4n 2 DP3n 2 DP2n 2 DP1n 2 Sn 2 BASELINE Q Fig 4 2 Channel Aggregate Data Format scheme for 720 series Fl if 1 the second word is the Format Info DT Dual trace enabled flag 1 enabled 0 disabled EQ Charge enabled flag ET Time Tag enabled flag EB Baseline en
12. area for the common settings valid for all channels Once all parameters have been set for the current channel it is possible to select another channel and a new configuration tab will be available UM2089 DPP CI User Manual rev 1 60 CAEN Electronic Instrumentation The General Settings section includes the following commands e Channel Enabled checkbox enables the selected channel to acquire data e DC Offset box sets the value of the DC Offset applied to the channel expressed as the percentage of the Full Scale Range Allowed values range between 50 Full negative and 50 Full Positive The DC Offset is a DC value added to the input signal by the input stage of the Digitizer in order to fit the signal dynamic range to the ADC input dynamics Theoretically the value of 0 DC Offset O means that the input pulse DC level is set at half of the ADC dynamics e g 2048 counts for the 720 series The value of 50 DC Offset 50 sets the DC level at the lower dynamics limit i e O counts while the value of 50 DC Offset 50 sets the DC level at the upper dynamics boundary i e 4095 The real DC offset adjustment implemented in the DPP Cl firmware is shown in Fig 7 7 in order to preserve from saturation the input signals near the dynamics boundaries setting the DC offset to 50 or 50 puts the signal baseline respectively a step up the upper boundary and a step under the lower bounda
13. board aggregate It increase with the increase of board aggregates BOARD AGGREGATE TIME TAG is the time of creation of the aggregate this does not corresponds to any physical quantity UM2089 DPP CI User Manual rev 1 18 19 CAEN Q Electronic Instrumentation Data Block The readout of the digitizer is done using the Block Transfer BLT refer to RD6 for each transfer the board gives a certain number of Board Aggregates consisting in the Data Block The maximum number of aggregates that can be transferred in a BLT is defined by the READOUT_BTL_AGGREGATE_NUMBER In the final readout each Board Aggregate comes successively In case of n Board Aggregates the Data Block is as in Fig 4 4 DATA BLOCK BOARD AGGREGATE 0 BOARD AGGREGATE 1 BOARD AGGREGATE n 1 Fig 4 4 Data Block scheme UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation 5 Getting Started Aim of the chapter This chapter is intended to provide a quick guide of the DPP CI Control Software through a simple application of gamma detection System Overview We used the following CAEN products e DT5720B 4 channel 12 bit 250 MS s Desktop Digitizer e DPP CI firmware release 4 5 130 23 running on the Digitizer e DPP CI Control Software release 1 2 4 running on the host station Fig 5 1 CAEN DPP CI System components Hardware Setup The DPCI receives on channel 0 of the DT5720B a signal from a 137 Cs radioactive sour
14. check the Wave box as PLOT MODE Action3 disable DUAL TRACE displaying Action4 check ANALOG TRACE 1 and select Input in the scroll box The input pulse from the Detector PMT system will be plotted Action5 disable ANALOG TRACE 2 DIGITAL TRACE 1 DIGITAL TRACE 2 DIGITAL TRACE 3 and DIGITAL TRACE 4 Action6 enable the continuous plotting by pressing the PLOT DISPLAY ON OFF button e OFF Plot displaying is off e ON Plot displaying is on w DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels KHan GEZI T Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channe ame Gan ae Channel 1 Channel 2 Plot Mode Channel 3 wave FFT Trace Selection Dual Trace Record Length 400 1600ns Analog Trace 1 Input Analog Trace 2 Baseline Digital Trace 1 H Trigger Digital Trace 2 Gate Digital Trace 3 External TRG Over Threshold PON oscilloscope v UM2089 DPP CI User Manual rev 1 32 33 CAEN Electronic Instrumentation The DC Offset is a DC value added to the input signal at the input stage of the Digitizer to fit the signal dynamic range to the ADC input dynamics The DC Offset parameter is expressed in percentage of the Digitizer s ADC input dynamics and ranges between 50 and 50 Theoretically the value of 0 DC Offset
15. of clock units i e 4 ns e Gate Offset box sets the pre gate parameter i e the starting position of the gate before the trigger signal Values are expressed in ns and vary in steps of clock units 4 ns UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation The Common Settings section includes e Self Trigger menu ENABLE DISABLE the DPP self trigger of each channel When disabled the DPP algorithm still generates the self trigger pulse auto trigger with the programmed threshold but the signal is propagated only to the TRG OUT panel output and not used to make the acquisition In these conditions the acquisition is activated by the external trigger signal received on the TRG IN panel input or by the combination of the other channel self triggers e Pre Trigger box sets the portion of the waveform acquisition window visible before the trigger i e the time before the trigger when the waveform starts to be saved It is expressed in ns The following relation must be true and it is recommended to set the pre trigger value to the minimum value allowed Gate Offset lt Pr e Trigger 28ns A Note When switching to histogram mode the Pre Trigger value is automatically set to the minimum allowed i e Gate Offset 28 ns e Charge Sens Menu sets the charge sensitivity the weight of the LSB for the charge data 16 bit For instance if Q 100 is read and Charge Sens 4
16. required Note It is recommended to install the driver before to connect the hardware Note Detailed installation steps of CAEN USB drivers for communicating with desktop digitizers are described for several Microsoft Windows OSs in RD7 How to install the driver Windows Download the latest release of the USB driver for Windows on CAEN website in the Software Firmware area at the DT5720 page Unpack the driver package Power on the Digitizer and plug the USB cable in a USB port on your computer Windows will try to find drivers and in case of failure the message Device driver software was not successfully installed may be displayed the driver needs to be installed manually Go to the system s Device Manager through the Control Panel and check for the CAEN DT5xxx USB1 0 unknown device Right click and select Driver software update in the scrolling menu Select the option to browse my computer for driver software Point to the driver folder and finalize the installation How to install the driver Linux Download the latest release of the USB driver for Linux on CAEN website in the Software Firmware area at the DT5720 page Unpack the driver package tar zxf CAENUSBDrvB xxx tgz Go to the driver folder cd CAENUSBDrvB xxx Follow the instructions on the Readme txt file Type make sudo make install Reboot your machine v SOFTWARE o DPP CI Control Software for Windows OS Download the standal
17. 0 fC LSB the integrated charge is 4 pC When the charge pulse exceeds the full scale range OxFFFF it is recommended to reduce the sensitivity in order to avoid saturation The allowed values fC LSB are 40 160 640 2560 L Note The charge is integrated inside the FPGA over a 22 bit accumulator the sensitivity defines the dividing factor i e the right shift of this accumulator to rescale the energy value before it is saved into the memory buffer e Trigger Hold Off menu sets the width of a time window after the trigger where any other triggers are inhibited It is expressed in steps of 128 ns Accepted values are 0 128 256 384 1920 e Baseline Mean menu sets the number of samples used by the mean filter to calculate the input pulse baseline Allowed values are Fixed 8 32 128 The Fixed option enables the absolute baseline calculation e Baseline menu sets the fixed value in LSB of the baseline when the Fixed value is selected in the Baseline Mean menu UM2089 DPP CI User Manual rev 1 62 63 CAEN Electronic Instrumentation The Tab Oscilloscope wv DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels KIRANG a2 Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channe Channel 1 Channel 2 Plot Mode Channel 3 Wave FFT Trace Selection Dual Trace Record Length 400 24
18. 12 Fig 3 1 Data organization into the Internal Memory Of x720 CigitiZer ccc cceseccccceseececceeeecccceeececseaececseaseceesuaaeceesuansceesaaeeseesaees 15 Fig 3 2 Channel Aggregate Data Format scheme for 720 series cccccccssscccceesececcessececcueeeceesueseceesaeseceessaseceesuaaeceesaanecessaaeseesages 16 Fig 3 3 Board Aggregate Data Format scheme cccccccssssccecsessececeeeecceceeesececeuseecessaeneceesaeeeeesaeseceesaaseceesaaseceesaaaeceeseenseessauaesessages 18 UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation Heco d Data POCKET EA EENEN OE EROE N EEEO EE E N EEEE 19 Fig 4 1 CAEN DPP CI System components sss ssesssessersressersrreserssessresseessrssersreoserssrosereseeseesseesresseesseoseesseoserereoseeoseeseesseeseesseeseeesee 20 Fig 4 2 Hardware and software setup for the DPP CI practical applicatiOn ccccsssccccssssecccceseecceseeeeceesaeeceeseaeceesaeeeceesaeeeeeesaees 20 Fig 4 3 CAENUpgrader settings for DPP CI firmware upgrade cccccccssssccccceeecceceeeeceeseesecccseeseceesueeceesuaeceesuaaeceesuaascessaaeesessages 23 Fig 4 4 Input signal DC offset adjustment description ssssensssseeesssreresrreresrrrressrrresssrresssrersssreressreressreressreressreressreresseeressseresseeee 33 Fig 6 1 The DPP CI Control Software block diagram ccccccsssscecceesscceceeeececsuseecccseaseceeseeseceesaueceesauseceesaaseceesuaaecessaaeeeeesanee
19. CAEN Electronic Instrumentation Tools for Discovery User Manual UM2089 DPP CI Digital Pulse Processing for Charge Integration Rev 1 21 April 2015 Purpose of this Manual This User Manual contains the full description of the Digital Pulse Charge Integration for 720 Digitizer series The description is only compliant with DPP CI firmware release 4 5 130 23 and DPP CI Control Software release 1 2 4 For future release compatibility check in the firmware and software revision history files Change Document Record Date Revision Changes 08 May 2013 00 mitilrelease O 21 April 2015 Added support for firmware revision 4 5_130 23 Symbols abbreviated terms and notation ADC Analog to Digital Converter DAQ Data Acquisition DPCI Digital Pulse Charge Integration DPP Digital Pulse Processing DPP CI DPP for Charge Integration DPP PSD DPP for Pulse Shape Discrimination MCA Multi Channel Analyzer OS Operating System PC Personal Computer PMT Photo Multiplier Tube QDC Charge to Digital Converter TDC Time to Digital Converter USB Universal Serial Bus Reference Documents RD 1 WP2081 Digital Pulse Processing in Nuclear Physics RD2 UM2580 DPSD User Manual RD3 AN2506 Digital Gamma Neutron discrimination with Liquid Scintillators RD4 GD2827 How to make coincidences with CAEN digitizers RD5 DPP Cl Firmware Registers COMING SOON RD6 UM1935 CAENDigitizer User amp Reference Manual
20. D AGGREGATE DATA FORMAT 31 30 29 28 27 26 25 24 23 22 21 20 19 18117 16 15 14 13 12 11 1019 8 7 6 5 4 3 2I111 0 BIT 0 110 BOARD AGGREGATE SIZE in words o BOARD ID BF PATTERN CHANNEL MASK WL BOARD AGGREGATE COUNTER mi JE BOARD AGGREGATE TIME TAG O CHANNEL AGGREGATE CHO E CHANNEL AGGREGATE CH1 N CHANNEL AGGREGATE CH7 Fig 4 3 Board Aggregate Data Format scheme BOARD AGGREGATE SIZE total size of the aggregate BOARD ID corresponds to the GEO address of the board In case of VX boards this number is automatically set for each board In case of VME boards this value is by default 0 for all boards It is possible to set the Board ID through register OxEFO8 The GEO address is quite useful in case of concatenate BLT CBLT read BF Board Fail flag This bit is set to 1 as a consequence of a hardware problem as for example the PLL unlocking The user can investigate the problem checking the Board Failure Status register 0x8178 or contacting CAEN support refer to Chapter Technical support L Notes BF bit is meaningful only for ROC FPGA firmware revision greater than 4 5 It is reserved for previous releases PATTERN is the value read from the LVDS I O VME only CHANNEL MASK corresponds to those channels participating to the Board Aggregate BOARD AGGREGATE COUNTER counts the
21. DS I Os connectors VME only make possible the synchronization of several boards UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation The following list summarizes what the user can do with the DPP CI system receive an input signal and digitize it continuously at 250MS s adjust the dynamic range programmable DC offset calculate the baseline and subtract it from the input signal Digital Baseline Restorer detect input pulses and generate a local trigger on them refer to Sect DPP CI trigger management for further details calculate the time of arrival of the trigger integrate the charge Q inside the integration gate window build the event through a configurable combination of Trigger Time Stamp Q baseline and raw waveforms i e series of ADC samples belonging to a programmable size acquisition window implement coincidences between channels of the same board RD4 as well as among channels of different boards through the LVDS I O connectors VME only external trigger and external modules save events list into a memory buffer and manage the readout through Optical Link USB or VME plot the signal waveforms oscilloscope mode and make online adjustments of the acquisition parameters plot energy spectrum of Q and timing distribution generate output files list and waveform in different formats suitable for external spectroscopy analysis software tools Energy and time histograms are not manag
22. Export Import Restore Configuration Runner Status Connection OK Disconnect Restart Pon Poscioscope B TRG 00s Make sure that the self trigger option is enabled This allows you to force the channel trigger and to visualize the signal input for the right parameter setting When you set all the parameters correctly you can disable the SW trigger and enable the self trigger of each channel Perform the path2 below UM2089 DPP CI User Manual rev 1 30 31 CAEN Q Electronic Instrumentation Path2 Tab CHANNELS Section COMMON SETTINGS Action1 set SELF TRIGGER on Enabled in the using the scroll menu box w DPP CI Control Software CAEN Nn Electronic Instrumentatio General KSETu Oscilloscope Stats Output Logger Channel Settings For Channel 0 fl General Settings Channel Enabled DC Offset of Common Settings Self Trigger Pre Trigger Charge Sens Trigger Hold Off Pulse Polarity NEGATIVE v LSB Gate ns Gate Offset ns ENABLED w Baseline Mean 8 lv ENABLED aan Now it is worth plotting the input signal to estimate the DC Offset adjustment Pon Poscitoscope v M 11 2 MBs 00s UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation Path3 Tab OSCILLOSCOPE gt Section OSCILLOSCOPE PLOT Action1 set Channel 0 in the CHANNEL list Action2
23. It is the redistribution of the pile up counts within fixed acquisition time windows with respect to the energy distribution in the same windows o X Axis Unit menu for Energy plot mode only selects the unit of measurement of the Energy x axis in the histogram between ADC Counts and KeV In order to define a KeV scale the Calibrate button opens the Energy Calibration window Fig 7 11 where it is possible to calibrate the spectrum by a dedicated menu a customized Calibration line can be built here Different calibration lines are available for the different channels Pile up detection is not implemented in DPP Cl systems 65 UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation A Note The KeV option affects only the histogram plot while the histogram x axis data will be always saved as ADC counts in the Output tab Energy Calibration Select Channel DENO i Calibration through linear interpolation X ADC ch HY kevy X ACD ch l Y keV Fig 7 11 Energy Calibration window o Log Scale menu enables disables the plot log scale UM2089 DPP CI User Manual rev 1 66 67 CAEN Electronic Instrumentation The Tab Stats 2 DPP C I Control Software CAEN Nn Electronic Instrumentatio General Channels Histogram Stats Output Logger Readout Rate Trigger Stat Channel ICR kHz PUR Run
24. L gt Section RUNNER Action1 click the button CONNECT The Connection window will appear 7 DPP PSD Control Software CAEN Nn Electronic Instrumentatio Acquisition Settings Acquisition Acquisition Mode Oscilloscope v Stop Time ms S Histogram Params nergy anc 1e v Configuration Configuration File Export Import Restore Runner Status Disconnected emet y restan arr Poscinoscope vi Action2 set the connection parameters values Using a USB communication link with a Desktop digitizer the correct settings are TYPE USB LINK 0 and ADDRESS 0 Tab 5 1 shows the setting values for common communication channels and Digitizers Further examples are in Tab 7 2 Connection x CAEN Nn Electronic Instrumentation Eua rd Status Disconnected FE g Parameters Connection Type ME Link Number oj Board Number Base Address VME Devices Only 0x lo Connection chain Type Link Slave Address PC gt USB gt DT5720 N6720 USB 0 0 0 PC gt USB gt V1718 gt VME gt V1720 USB 0 0 32100000 PC gt PCI PCle gt A2818 A3818 gt CONET gt DT5720 N6720 PCI 0 0 0 PC gt PCI PCle gt A2818 A3818 gt CONET gt V1720 PCI 0 0 32100000 Tab 5 1 Examples of connection settings For the correct V
25. ME base address to be used please refer to the Digitizer s User Manual 25 UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Action3 click the button CONNECT and verify that the connection Status turns on green i e Connection OK then click the button DONE Connection CAEN Nn Electronic Instrumentatio Status Connection OK E e Parameters Connection Type Link Number Base Address VME Devices Only 0x 0 UM2089 DPP CI User Manual rev 1 v OF wv ena Mrs ar 007 o Board Number 26 27 CAEN Q Electronic Instrumentation 3 Set Oscilloscope mode enable Channel 0 check signal polarity and start acquisition Path1 Tab GENERAL gt Section ACQUISITION SETTINGS Action1 set ACQUISITION MODE on Oscilloscope using the scroll menu box 2 DPP Cl Control Software CAEN Nn Electronic Instrumentatio Acquisition Settings Acquisition Acquisition Mode Stop Time Histogram Params SW Triggers OFF Single Configuration Configuration File Export Import Restore Runner Status Connection OK Disconnect Restart POrF Jjosciuoscope v M 0 00 MBs 00s UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Path2 Tab CHANNELS gt Field CHANNEL SETTINGS FOR gt Section GENERAL SETTINGS Action1 Select Channel 0
26. P TIME After 120 sec the acquisition will automatically stops DPP CI Control Software CAEN N Electronic Instrumentatio General Acquisition Settings Acquisition Acquisition Mode Stop Time Histogram Params SW Triggers Configuration Configuration File Runner ON Histogram mv 120 S Energy and Time iai OFF Single Export Import Restore Status OG Connection OK Disconnect Restart PON mon cues 505 The resulting eg energy spectrum is shown in the following histogram 769 151 2147 66 UM2089 DPP CI User Manual rev 1 Energy Histogram Ch0 1 Ehisto 219863 600 ADC channels 50 CAEN Electronic Instrumentation 8 Generate the output file and save the Energy Histogram plot data The steps below explain how to save the List file Time Stamp and Charge by generating an output file on the host station disk Path1 Tab OUTPUT gt Section1l OUTPUT Action1 use the OUTPUT DIRECTORY button to browse a specific destination folder where to save the output file on the host station in the example we use the Desktop folder If no destination is selected data will be saved into the user home folder Action2 in the OUTPUT FILE PREFIX text box write the name of the prefix for the output file dump in this case and press Enter on your keyboard If no prefix i
27. Tab 4 2 Examples of connection settings ssessssesssirerrrsssesretsatsrresnsttostttttntnt isst tetest EEN ENES EVEN EK ENN EEN NES REESE ES EEN ERE SERENE IEEE SE NESS ERE NER 25 Tab 6 2 Table of the Connection icon values 5 sniiscescasasesseuscerwsendsaerscnerciwscdaetaseassaneceedsaisecneuaiwsabddedsiiceadwitbdeadsdines sapacbdiedsiineendniabaseanaes 57 Tab 6 3 Examples of connection settings 52 ac EEN LA eier ersten resisa dere drer 59 5 UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation 1 Introduction CAEN S p A offers a wide range of digitizers for different needs of sampling frequency resolution form factor etc Besides the use of the digitizers as a waveform recorder only oscilloscope mode the user can upload special versions of the FPGA firmware for the Digital Pulse Processing DPP algorithms A digitizer running in DPP mode becomes a multipurpose instrument which replaces most of the traditional modules such as MCAs QDCs TDCs Discriminators etc for more details refer to the DPP overview RD1 CAEN provides two algorithms for the charge integration of the digitized input pulses at the firmware level e the Digital Pulse Processing for Charge Integration firmware DPP Cl single gate compatible to the 720 series digitizers featuring both the EP1C4 and the EP1C20 Altera FPGA models e the Digital Pulse Processing for Pulse Shape Discrimination firmware DPP PSD dual gate running only on th
28. Time s 13 91 0 0 26 91 0 11 MB s ED oran E Fig 7 12 Tab Stats In the Stats Tab are summarized most of the important statistic information about every enabled channels The tab is composed by two sections Readout Rate and Trigger Stat The Readout Rate section hosts e value is visible inthe Common Bar The Trigger Stats section is made by Readout Rate display shows the data throughput from the board to the computer in MB s the same Trigger Stats table reports for each enabled channel Channel the real time Incoming Counting Rate ICR expressed in kHz the Pile Up Rejection PUR in percentage and the Run Time in seconds UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation The Tab Output DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels Histogram Stats iaiia Logger Output Output Directory C lUsersitest lt s Output File Prefix dump Run Number 000 Output Files Histogram Mode B List Time Histogram Energy Histogram Fig 7 13 Tab Output In the Output Tab there are all the commands to save output files containing spectra waveforms and lists on a PC The sections in this tab are Output and Output Files The Output section includes the following settings e Output Directory box contains the destination path for the output fil
29. Trigger Hold Off Tan oscitoscope P 10 c2MBsfh 00s UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Action2 Set the GATE width to the proper value according to the input signal We choose 600 ns to cover the whole signal width The following relation must be satisfied Gate Offset lt Gate E DPP CI Control Software CAEN Nn Electronic Instrumentation General iene Oscilloscope Histogram Stats Output Logger Channel SettingsFor Channelo i General Settings a Channel Enabled DC Offset oF Pulse Polarity DPP Settings Threshold LSB Gate Gate Offset Common Settings Self Trigger Baseline Mean 32 Baseline ol Pre Trigger Charge Sens Trigger Hold Off PON Posciioscope varsom oo Waveform Ch0 1 Input 2 Baseline 3 Trigger 4 Gate ADC counts 0 674853 2036 89 You can see that the baseline is now frozen for the whole signal width UM2089 DPP CI User Manual rev 1 42 CAEN Q Electronic Instrumentation 6 Set the Trigger Hold Off and Pre Trigger parameters The Trigger Hold Off enables a time window after the trigger where any other triggers are inhibited Make sure to set the proper value of the Trigger Hold Off according to your signal width especially in case of high frequency signals Path1 Tab OSCILLOSCOPE gt Section OSCILLOSCOPE PLOT Action1 Enable DIGITAL TRACE 4 and selec
30. User Manual rev 1 56 57 CAEN Q Electronic Instrumentation GUI Description The Graphical User Interface GUI is composed of seven 7 Tabs each one divided in one or more sections In the different tabs there are all the commands needed to manage the connections to set the board and the channel parameters and to control the acquisition A Common Bar lays at the bottom of the GUI Fig 7 3 being visible from any active tab It contains Oscilloscope Ed 0 00 MBs oos Fig 7 3 Common Bar Acquisition Time e Acquisition button starts and stops the acquisition session e Acquisition Mode menu sets the Oscilloscope or the Histogram acquisition mode e Readout Rate box displays the data throughput rate during the acquisition e Time acquisition box displays the time duration sec of the acquisition This works only in the Histogram Mode The acquisition will automatically stop if a non zero value is set for the Stop Time parameter e Connection icon updates itself according to the connection status Disconnected Connection OK Connection Error 7 1 Table of the Connection icon values 2 og UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation The Tab General gt DPP CI Control Software CAEN Nn Electronic Instrumentation eeg Channels Histogram Stats Output Logger Acquisition Setting
31. abled flag ES Waveform samples enabled flag Trg Md Trigger Mode enabled flag AP Analog Probe selection for DPP Cl this is equal to the Baseline DP3 Digital Virtual Probe 3 selection among 000 External TRG the external trigger signal when enabled 001 Over Threshold digital signal that is 1 when the input signal is over the requested threshold 010 Shaped TRG logic signal of programmable width coming out together with the trigger This is useful to externally propagate the trigger and to acquire in coincidence mode refer to RD4 UM2089 DPP CI User Manual rev 1 16 17 CAEN Q Electronic Instrumentation 011 TRG Val Acceptance Win logic signal corresponding to the time window where the coincidence validation is accepted The validation enables the event dump into the memory see RD4 100 Reserved 101 Coincidence logic pulse set to 1 when a coincidence occurred refer to RD4 DP4 Digital Virtual Probe 4 selection among 000 Reserved 001 Over Threshold digital signal that is 1 when the input signal is over the requested threshold 010 TRG Validation digital signal that is 1 when a coincidence validation signal comes from the mother board FPGA refer to RD4 011 TRG HoldOff digital signal corresponding to the Trigger Hold Off 100 Reserved 101 Coincidence logic pulse set to 1 when a coincidence occurred refer t
32. and easily adjust the parameters for the acquisition Running in oscilloscope mode implies a very high data throughput due to the huge amount of samples saved into the board memory and then read out by the DAQ software The DPP CI firmware can manage both acquisition modes together in the Mixed acquisition mode where it is possible to read the charge the baseline and the time stamp information together with a portion of the waveform so that the user can retrieve further information and use it off line still keeping a reasonable level of throughput bandwidth The DPP CI Control Software can manage both the list and the waveform acquisition mode with the exception of the mixed mode In the list mode the software can retrieve the list information from the digitizer to make the relevant histogram and save the output files Working in waveform mode the software can plot the digital pulse for online monitoring and save the output file Users who wants to acquire in mixed mode have to write their own software Example codes are available in the Samples folder of the CAENDigitizer library package RD6 UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation 4 Memory Organization Each channel has a fixed amount of RAM memory to save the events The memory is divided into a programmable number of buffers also called aggregates where each buffer contains a programmable number of events The event format is programmable as
33. annel Settings For Channel 0 MEKI T General Settings Channel Enabled DC Offset of Copy Settings Pulse Polarity NEGATIVE v E te Gate Offset Common Settings Self Trigger Baseline Mean Pre Trigger Charge Sens Trigger Hold Off Tan Poscitoscope v 10 52 MBSA 00s UM2089 DPP CI User Manual rev 1 38 39 CAEN Q Electronic Instrumentation Path8 Tab GENERAL gt Section ACQUISITION SETTINGS Action1 Disable Software Trigger by the ON OFF button You should observe the board going on self triggering Path9 Tab OSCILLOSCOPE gt Section OSCILLOSCOPE PLOT Action2 Enable DIGITAL TRACE 1 and select Trigger Press the button and use the options in the Trace Settings window to set the proper digital offset and gain to apply to the trace DPP CI Control Software CAEN Nn EENE General Channels KARSTIE IE Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channet TED Conde 2 Channel 1 Channel 2 Plot Mode Channel 3 wave FFT Trace Selection ase Se Dual Trace Record Length 400 34 1600ns Select Trace Digital Trace 1 4 Analog Trace 1 Input x lt 4 Trace Enabled Analog Trace 2 Baseline v Faire rn BELI Trace Variable Trigger Digital Trace 1 ae Trace Offset
34. area Refer to RD1 for detailed information and instructions on how to use it UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation 8 Technical support CAEN makes available the technical support of its specialists at the e mail addresses below support nuclear caen it for questions about the hardware support computing caen it for questions about software and libraries UM2089 DPP CI User Manual rev 1 74 CAEN Electronic Instrumentation Tools for Discovery CAEN SPA is acknowledged as the only company in the world providing a complete range of High Low Voltage Power Supply systems and Front End Data Acquisition modules which meet IEEE Standards for Nuclear and Particle Physics Extensive Research and Development capabilities have allowed CAEN SpA to play an important long term role in this field Our activities have always been at the forefront of technology thanks to years of intensive collaborations with the most important Research Centres of the world Our products appeal to a wide range of customers including engineers scientists and technical professionals who all trust them to help achieve their goals faster and more effectively CAEN S p A CAEN GmbH CAEN Technologies Inc Via Vetraia 11 KlingenstraBe 108 1140 Bay Street Suite 2 C 55049 Viareggio D 42651 Solingen Staten Island NY 10305 Italy Germany USA Tel 39 0584 388 398 Tel 49 0 212 254 4077 Tel 1 718 981 0401 F
35. ax 39 0584 388 959 Mobile 49 0 151 16 548 484 Fax 1 718 556 9185 info caen it Fax 49 0 212 25 44079 info caentechnologies com www caen it info caen de com www caentechnologies com www caen de com CAEN Electronic Instrumentation Tools for Discovery UM2089 DPP CI User Manual rev 1 21 April 2015 00117 10 DGT28 MUTX Copyright CAEN SpA All rights reserved Information in this publication supersedes all earlier versions Specifications subject to change without notice 75 UM2089 DPP CI User Manual rev 1
36. ce as detected by a Nal TI detector coupled with a PMT The CAEN N1470 a 4 channel HV Programmable Power Supply board provides the power supply to the PMT A computer equipped with a Microsoft Windows 7 Professional 32 bit OS acts as host station The communication protocol between the computer and the Digitizer is USB 2 0 version N1470 DPP CI Control Software q 137 Nal TI PMT DT5720B Cs DPP Cl Firmware Fig 5 2 Hardware and software setup for the DPP Cl practical application UM2089 DPP CI User Manual rev 1 20 VAAN 21 CAEN Q Electronic Instrumentation Drivers and Software In order to manage the DPP CI System the host station needs either Windows or Linux OS and the third party software Java Runtime Environment 7 or later trademark of Oracle Inc downloadable from http www java com Linux users must also take care of proper installation of gnuplot graphical tool as well as of CAEN Libraries The latter can be downloaded from CAEN website login required before to download According to the preferred way of connection to the digitizer users must also take care of proper installation of USB or optical drivers In our case we are going to describe the procedure for USB connection DRIVERS o USB 2 0 CAEN driver Note If you re using a different communication interface i e Optical Link or VME the related driver is
37. d in a Daisy chain connection between different boards e Base Address box for VME boards only sets the VME base address Set O for direct connection More details about the connection parameters can be found in RD1 and RD7 As reference in Tab 7 2 there are shown some connection examples involving the DPP Cl supporting boards Connection chain Type Link Slave Address PC gt USB gt DT5720 USB 0 0 0 PC gt USB gt V1718 gt VME gt V1720 USB 0 0 32100000 PC gt PCI gt A2818 gt CONET gt N6720 PCI 0 0 0 PC gt PCI gt A2818 gt CONET gt V1720 PCI 0 0 32100000 PC gt PCI gt A2818 gt CONET gt V1720 PCI 0 1 0 PC gt USB gt DT5720 USB 1 0 0 Tab 7 2 Examples of connection settings For the correct VME base address to be used please refer to the Digitizer s User Manual The VME Digitizer is intended to be part of a Daisy chain see the examples at the end of RD1 It is supposed that at least two USB ports are used by the PC to communicate with digitizers see the examples at the end of RD7 UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation The connection is handled by e Connect button establishes the connection A green sign will confirm the correct connection e Close button closes the connection window When a connection is establ
38. ducts sometimes translates into poor pay and working conditions for the people who make them at least you know that who made your board was reasonably paid and worked in a safe environment this obviously applies only to the boards marked MADE IN ITALY we cannot attest to the manufacturing process of third party boards ce Z CAEN Q Electronic Instrumentation Index Purpose OF tns Minta lesne EE E EE EEE Ea EEEE EEAO E 2 Change Document RECO O sucsciiasi iieri en a E a a E E 2 Symbols abbreviated terms and notation ccscanssesscdesecesctusrccesnedeeesdeabtecestabecuadgvsiesionerdansactasbadeadedecsssguensvestadegssaaueresieses 2 PET CICS OCIS IVs A EEEE A E A AE E 2 NG ED SEE SEES N EE EN T T E EEN E E ET err 4 ESE ON FE CS oor E E E A ere 4 HERO NICS SEES EET E E eee DET NNE PEA 5 T WAVE OCU CUO e EE E A E 6 2 Principle of Operation sesessesessssesescesescecesoesesoscesoecesosceseececesoesesoesesoecesoesesoesesseseeseo TN 9 BaS RE a A E EA E A A 11 DP PC Heer manageme errosa EE E EN 12 3 Acaubtion Modes 54350 arealerne A 13 4 Memory Organization ssesseeseescescesceecoesceccecceecoeccesceecoeccescecceccoesceccecceecoecsecceeseesseee T 4 TZ SUNS IEEE AS O EO E I E OEN EATE EA E E EE ET EA ETE 15 EV O RA HORII EEN E EEE T E E E E earn 16 Channel Aggregate Data Format for 720 series ccccccccsssececceeseccecaeeccecaeueecessessecessuaecessueeceesauseceesuaueceessaaeeeesaggases 16 Board Aggregate Data For
39. e Channel FPGA AMC The AMC purpose is to perform the on line Digital Pulse Processing to implement a Charge Integration MCA DPP Cl A simplified block diagram of the module is shown in Fig 1 1 UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation CHANNEL ER FPGA me AMC 250MS s LOCAL BUS 8 O m cc X I INTERFACE FPGA ROC 1 VME boards only 2 Desktop NIM boards only 3 for Desktop NIM baords TRG OUT GPO S IN GPI Fig 1 1 Simplified block diagram of the Digitizer The DPP CI Firmware makes makes the digitizer a spectroscopy acquisition system providing on line energy single gate integrated charge timing information as well as portions of the waveform for debugging monitoring and further off line pulse shape analysis The DPP Cl system also includes the DPP CI Control Software which allows to set the parameters for the acquisition to configure the hardware and to perform the data readout It allows also to collect the histograms and to plot and to save the list the histogram and the waveforms The program can easily be interfaced to software tools for the spectroscopy analysis Drivers libraries and demo source codes are also available for those who need either to modify the program for their specific needs or to integrate it into their DAQ programs It is also possible to operate with multi board systems the front panel clock the trigger and the general purpose LV
40. e 720 series digitizers 12 bit 250MS s with the EP1C20 FPGA and on the 751 series digitizers 10 bit 1 GS s DES mode not supported The DPP PSD firmware allows for charge integration in two different gate widths to discriminate short and long components of the signal For more details and examples as the gamma neutron discrimination see RD2 and RD3 This manual describes in details the DPP CI algorithm suitable for those models summarized in Table 1 The use of DPP CI is particularly recommended for digitizers with EP1C4 FPGA where the DPP PSD is not supported for limitations on the FPGA memory All the DPP Cl functionalities are included in the DPP PSD firmware Note The description of the DPP Cl system of this Manual is only compliant with DPP Cl firmware release 4 5 130 23 and DPP Cl Control Software release 1 2 4 For future release compatibility check in the firmware and software revision history files Desktop Description Product Code Digitizers DT5720 4 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 SE WDT5720XAAAA DT5720A 2 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 SE WDT5720AXAAA DT5720B 4 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 SE WDT5720BXAAA DT5720C 2 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 SE WDT5720CXAAA DT5720D 4 Ch 12 bit 250 MS s Digitizer 1OMS ch C20 SE WDT5720DXAAA DT5720E 2 Ch 12 bit 250 MS s Digitizer 1OMS ch C20 SE WDT5720EXAAA NIM Di
41. e to be plotted among Over Threshold digital signal that is 1 when the input signal is over the requested threshold TRG Validation digital signal that is 1 when a coincidence validation signal comes from the mother board FPGA refer to RD4 TRG HoldOff digital signal corresponding to the Trigger Hold Off Coincidence logic pulse set to 1 when a coincidence occurred refer to RD4 o 6 u button opens the Trace Setting window Fig 7 9 to set the DC offset and the gain of the traces in the Oscilloscope plot These settings have no effect on the real input signal but only on the visualization of the Oscilloscope plot For this reason it is recommended to adjust only the digital traces offset and gain for a correct visualization Trace Settings Trace Enabled Trace Variable Trigger Trace Offset J vr ooood Poo et w Trace Gain Fig 7 9 The Trace Settings Window UM2089 DPP CI User Manual rev 1 64 CAEN Electronic Instrumentation The Tab Histogram DPP CI Control Software CAEN Nn Electronic Instrumentation General Channels 4 Histogram Plo Plot Display Active Plot Channet OFF Single Channel 1 Channel 2 Channel 3 Clear Histogram Plot Mode Energy Time Trace Selection Trace 1 Energy Histogram Trace 2 Energy Histogram Corrected Trace 3 Pulse Rejection Histogram X Axis Unit cou
42. e which is modified by the GUI itself Moreover in the configuration file there are some advanced controls that are not present in the GUI Acting in the different sections of the Configuration File makes possible to enable disable modify these features In this section there is a brief description of the Configuration File and of the Syntax used The Configuration File is a text file called DPPRunnerConfig txt generated by the program in a different destination path according to the user Here follows some examples of typical paths for different Operating Systems Windows HomePath AppData Local DPP Cl_ ControlSoftware DppRunnerConfig txt Where in e Windows XP HomePath is C Documents and Settings lt USER gt e Windows 7 HomePath is C Users lt USER gt Linux home lt USER gt DPP Cl_ ControlSoftware DppRunnerConfig txt Note this is the Configuration file that has to be used for enabling disabling modifying the GUI controls The safer procedure to modify the Configuration File is 1 Disconnect the board via GUI 2 Modify the Configuration File 3 Save the Configuration File 4 Connect the board via GUI 5 Start acquisition The Configuration File is divided in two 2 sections COMMON and INDIVIDUAL Common Settings are listed in the file after the COMMON keyword and they are in common to all the channels of the Digitizer Individual Settings are the ones related to a single channel of the Digitizer Each list of individua
43. ecifically for the Digitizer family and it supports also the boards running the DPP firmware The CAENDigitizer library is based on the CAENComm library For this reason the CAENComm libraries must be already installed on the host PC before installing the CAENDigitizer The CAENDigitizer installation package is available on CAEN website in the Download area at the CAENDigitizer Library page Reference document RD6 e CAENComm library manages the communication at low level read and write access The purpose of the CAENComm is to implement a common interface to the higher software layers masking the details of the physical channel and its protocol thus making the libraries and applications that rely on the CAENComm independent from the physical layer Moreover the CAENComm requires the CAENVMELIib library access to the VME bus even in the cases where the VME is not used This is the reason why CAENVMELib has to be already installed on your PC before installing the CAENComm The CAENComm installation package and the link to the required CAENVMELib is available on CAEN website in the Download area at the CAENComm Library page Reference document RD14 UM2089 DPP CI User Manual rev 1 54 55 CAEN Electronic Instrumentation Currently the CAENComm and so the CAENDigitizer supports the following communication interfaces PC gt USB gt Digitizer either Desktop or NIM models PC gt USB gt V1718 gt VME gt
44. ed onboard but they can be generated and saved by the DPP Cl Control Software UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation 2 Principle of Operation The figure below shows the functional block diagram of the DPP Cl firmware TIME STAMP INPUT DELAY CLK TIME com TRIGGER COUNTER DELAY a ACCUMULATOR a 1 INTEGRATOR EVENT BUILDER Pre Trigger BASELINE GATE Fig 2 1 functional block diagram of DPP CI firmware The main operations of the DPP CI firmware can be summarized as follows e the algorithm continuously calculates the baseline of the input signal by averaging the samples belonging to a moving window of programmable size see Sect Baseline The baseline is subtracted from the input signal giving input sub input baseline e the input sub value is compared with the value of the trigger threshold and the trigger fires as soon as the input sub signal crosses the threshold see Fig 2 2 e once the trigger fires the signal is delayed by a programmable number of samples corresponding to the pre trigger value in ns In this way the gate for charge integration can start before the trigger through the gate offset value During the gate the baseline is frozen to the last averaged value and its value is used as integral reference e for the whole duration of a programmable trigger hold off value other trigger signals are inh
45. ement of the DPP Cl firmware UM2089 DPP CI User Manual rev 1 12 CAEN Q Electronic Instrumentation 3 Acquisition modes As described on Sect DPP CI trigger management each individual channel of the digitizer can trigger independently from the others When the input signal fires the trigger the DPP CI firmware integrates the input samples within the programmed time window The main acquisition mode is called List mode where the digitizer provides the time of arrival of the input also called Trigger Time Stamp and its charge As soon as the list reaches a certain size it is made available for readout and the acquisition continues in another buffer Being the size of the event very small typically few bytes the throughput is extremely reduced The firmware is not designed to make histogram onboard anyway it can transfer the list information to the software for the histogram management The DPP CI firmware allows also to acquire waveform samples i e a sequence of samples within a programmable acquisition window in the Waveform acquisition mode This acquisition mode is mainly intended to debug and to set the DPP parameters For each trigger internal or external the digitizer saves a portion of the waveform into a local memory buffer Running in Oscilloscope Mode the user can view the input signal the baseline and other control signals such as the trigger the gate the trigger hold off etc in the same plot
46. emory Note Fig 4 1 refers to the event storage in the physical memory while the event readout format is shown in the Event Data Format section One Event TRIGGER TIME TAG S4 So 3 uogeoo Asowaw Fig 4 1 Data organization into the Internal Memory of x720 digitizer Baseline data is the baseline value frozen at the trigger fire As previously said the RECORD_LENGTH and the CONFIG settings determine the event size the user must calculate the number of event per buffer Ne and the number of buffers 277 accordingly When the board runs in List Mode the event memory contains only two locations one for the Trigger Time Tag and one for the Charge and Baseline Therefore it is very small and it is suggested to use a big value for Ne to make the buffer size as big as at least a few KB Small buffer size results in low readout bandwidth The only drawback of setting high values for Ne is that the events are not available for the readout until the buffer is complete hence there is some latency between the arrival of a trigger and the readout of the relevant event data Conversely when the board runs in Oscilloscope Mode especially when the record length is large it is more convenient to keep Ne low typically 1 Example1 suppose that the mixed mode is enabled and Ns is set to 400 samples event size in locations 1 Time_Stamp Ns 8 Waveform 1 Charge_Baseline 52 loc Supp
47. er management The DPP CI firmware allows for several way of trigger generation 1 each channel can self trigger on its own input signal when the input crosses a programmable threshold The self trigger works on each channel independently from the other channels 2 each channel triggers independently then only those events satisfying programmable conditions are saved Referring to Fig 2 4 the TRG_LOGIC can combine AND OR MAJ the trigger request TRG_REQ from each self trigger When the logic condition is met a trigger validation TRG_VAL is sent back to each channel individually to enable the acquisition of that event Events not receiving a TRG_VAL signal are discarded This technique allows to make coincidence and anti coincidence requests among different channels refer to RD4 for further details 3 the board can accept an external trigger on the TRG IN connector The external trigger can be used in OR logic operation with the channel self trigger or it can be used as a VETO to inhibit the individual self trigger If the self trigger is disabled the acquisition is managed by the external trigger only 4 individual trigger and logic combination of self trigger of different channels AND OR MAJ can be propagated through the TRG OUT connector CHli INPUT i Acquisition Memory Readout Control buffer TRG IN TRG LOGIC AND OR MAJ e TRG OUT Fig 2 4 Diagram showing the structure of the trigger manag
48. es Directly write the path or inserted it using the button If no destination is selected data is saved into the user home folder e Output File Prefix box contains the prefix for the output file name If no prefix is chosen the default one is used e Run number box contains the run number for the output file This number automatically increase by one unit when at the start of a new acquisition through the ON OFF Acquisition button The complete file name will be Prefix_Run_XY_N dat where XY is eh in case of Energy Histogram th in case of Time Histogram Is in case of List and wf in case of Waveform and N is the channel number Data saving is activated by selecting the options in the Output Files section For the Histogram Mode there is the possibility to choose among e List checkbox saves every event in ASCII or BINARY format according to the list format menu ASCII list format is a 2 column file where the first column is the Trigger Time Tag the second is the integrated charge Q in ADC counts Note that the Trigger Time Tag is expressed in sampling clock units where the clock unit is 4 ns for 720 The Time Stamp is not corrected for the roll over therefore once it reaches its maximum it starts again from zero BINARY list format the file contains the sequence of the recorded events in the binary format Each event is represented in the following format unsigned
49. f PON Poscitoscope v 10 34 MBS cos gnuplot graph Waveform Ch0 ADC counts 0 868114 1867 00 1 Input 2 Baseline 3 Trigger 4 Gate 6 TRG HoldOff Action3 Stop the oscilloscope mode plotting through the PLOT DISPLAY ON OFF button UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation 7 Switch to Histogram mode and plot the Energy Spectrum Once the DPP Cl parameters are properly set it is possible to plot the Energy Histogram of the gamma ray source The Energy Histogram is calculated through the charge information provided out by the Digitizer Note In the Oscilloscope acquisition mode it may happens that a lot of data are processed and transmitted so that the Digitizer memory can go full and some data are lost You can check it through the red BUSY LED on the Digitizer L front panel Often this situation happens when you have high frequency input signals and or the RECORD LENGHT window is big Conversely in the Histogram acquisition mode the overall data throughput of the Digitizer is significantly reduced since only few data are transmitted Trigger Time Stamp and Charge and the busy state can disappear Path1 Any Tab Action1 set ACQUISITION MODE on Histogram using the scroll box menu in the deep grey common bar at the bottom of the GUI DPP CI Control Software CAEN Nn Electronic Instrumentatio General KAET Oscilloscope Channel Set
50. gisters refer to the specific x720 User Manual and RD5 A copy of the Configuration File can be found in the data folder of the program and it is called DPPRunnerConfigDefault txt This file contains the default values for all parameters and it is read by the GUI when the Restore button is pushed At the same destination path of the DPPRunnerConfig txt another file is generated by the program that is the GuiConfig txt this contains the structure definition of the GUI not to be modified by the user and a section with the trace parameters shown in Fig 7 9 Trace Offset and Trace Gain UM2089 DPP CI User Manual rev 1 72 73 CAEN Electronic Instrumentation Notes on Firmware and Licensing The DPP Cl supports the DPP Cl Firmware for the 720 series of CAEN digitizers When running the DPP CI Control Software the program checks the loaded firmware in the target Digitizer and pops up a warning message if no licensed version is found Fig 7 16 x Warning firmware is unlicensed Remaining demo mode time 18 minutes Fig 7 16 Firmware unlicensed warning message The DPP Cl Firmware is unlocked by purchasing a license from CAEN The licensing procedure is detailed in RD1 and makes use of CAENUpgrader software to finalize the unlocking This program can also upgrade the DPP Cl by loading new firmware versions on the digitizer Note Download CAENUpgrader full installation package on CAEN web site at the Digitizer Tools
51. gitizers Description Product Code N6720 4 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 SE WN6720XAAAAA N6720A 2 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 SE WN6720AXAAAA N6720B 4 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 SE WN6720BXAAAA N6720C 2 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 SE WN6720CXAAAA N6720D 4 Ch 12 bit 250 MS s Digitizer 1OMS ch C20 SE WN6720DXAAAA N6720E 2 Ch 12 bit 250 MS s Digitizer 1OMS ch C20 SE WN6720EXAAAA VME Digitizers Description Product Code V1720 8 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 SE WV1720XAAAAA V1720B 8 Ch 12 bit 250 MS s Digitizer 1OMS ch C4 SE WV1720BXAAAA V1720C 8 Ch 12 bit 250 MS s Digitizer 1 25MS ch C4 DIFF WV1720CXAAAA V1720D 8 Ch 12 bit 250 MS s Digitizer 1OMS ch C4 DIFF WV1720DXAAAA V1720E 8 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 SE WV1720EXAAAA V1720F 8 Ch 12 bit 250 MS s Digitizer 1 25MS ch C20 DIFF WV1720FXAAAA V1720G 8 Ch 12 bit 250 MS s Digitizer 1OMS ch C20 SE WV1720GXAAAA pp are Jaccriotic Dine de DPP CI Digital Pulse Processing for Charge Integration for x720 WFWDPPCIAAAA Table 1 Supported CAEN digitizers for DPP CI firmware For accessories and customizations related to digitizers and for multiple DPP CI license packs refer to the specific board User Manual or check in the CAEN web site www caen it The analog input signal is continuously converted into a stream of digital samples and on line processed by th
52. he drivers for all the different types of physical communication interfaces featured by the specific digitizer and compliant with Windows and Linux OS e USB 2 0 Drivers for NIM Desktop boards are downloadable on CAEN website www caen it in the Software Firmware tab of the digitizer web page login required Note Windows OS USB driver installation for Desktop NIM digitizers is detailed in RD7 e USB 2 0 Drivers for V1718 CAEN Bridge required for VME boards interface is downloadable on CAEN website www caen it in the Software Firmware tab of the V1718 web page login required Note For the installation of the V1718 USB driver refer to the User Manual of the Bridge RD11 e Optical Link Drivers are managed by the A2818 PCI card or the A3818 PCle card The driver installation package is available on CAEN website in the Software Firmware area at the A2818 or A3818 page login required L Note For the installation of the Optical Link driver refer to the User Manual of the specific Controller RD12 RD13 Libraries CAEN libraries are a set of middleware software required by CAEN software tools including WaveDump for a correct functioning These libraries including also demo and example programs represent a powerful base for users who want to develop customized applications for the digitizer control communication configuration readout etc e CAENDigitizer is a library of functions designed sp
53. i0 somBsfy 00s The user must choose either one of the two methods UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation The plotting of the input signal and the baseline can help to check the effect of the setting Path6 Tab OSCILLOSCOPE gt Section OSCILLOSCOPE PLOT Action1 enable DUAL TRACE displaying by clicking the related check box This allows the second analog trace ANALOG TRACE 2 to be plotted When you disable the DUAL TRACE setting the ANALOG TRACE 2 will not be plotted even if enabled Action2 enable ANALOG TRACE 2 check box and select Baseline in the scroll menu w DPP CI Control Software CAEN Nn Electronic Instrumentation 5 gee About General Channels KORAI GEY sf Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channel ON Sinaia Channel 1 Channel 2 Plot Mode Channel 3 wave FFT Trace Selection Dual Trace Record Length 400 24 1600 ns Analog Trace 1 Input x tanz Digital Trace 1 Trigger v Digital Trace 2 Gate v Digital Trace 3 External TRG v Digital Trace 4 Over Threshold PON oscitoscope v 10 52 MBSA 00s lod gnuplot graph Waveform Ch0 1 Input 2 Baseline _ eran iene ee ADC counts 1 38233 2048 92 UM2089 DPP CI User Manual rev 1 37 CAEN Electronic Instrumentation The baseline rema
54. ibited It is recommended to set a trigger hold off value compatible with the signal width The baseline is frozen for the whole trigger hold off duration e the trigger enables the event building that includes the waveforms i e the raw samples of the input the trigger time stamp the baseline and the charge calculated within the gate At the end of the maximum value between the gate and the trigger hold off the system gets ready for a new event e the event data is saved into a memory buffer The Control Software automatically optimize both the number of events inside the buffer and the number of total buffers the memory is divided in The user can also choose to set those parameters by hand If the buffer contains only one event that buffer becomes immediately available for the readout and the acquisition continues into another buffer If more events are written in one buffer those events become available for the readout only when the buffer is complete UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Acquisition Window Trigger Hold Off Baseline oo o yy o o o o S1 S2 S3 D Time Fig 2 2 Diagram summarizing the DPP CI parameters The trigger fires as soon as the signal crosses the threshold value Gate Gate Offset Pre Trigger Trigger Hold Off and Record Length are also shown for one acquisition window UM2089 DPP CI User Manual rev 1 10 CAEN Electronic Instrumentation Base
55. iles keep the original pulse polarity DPP CI Control Software CAEN Nn Electronic Instrumentatio General KALETE Channel Settings For Channel 0 General Settings Channel Enabled Copy Settings POSITIVE Threshold 100 LSB Gate Gate Offset Common Settings Self Trigger ENABLED nd Baseline Mean Pre Trigger Charge Sens Trigger Hold Off Pon oscinoscope v tc Joos UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation 4 Set the parameters for self triggering DC Offset Baseline Threshold With the acquisition on since it is not guaranteed that the channel is properly triggering on the input pulses the Software Trigger is used to force the acquisition It is so possible to adjust parameters like the DC Offset the Baseline and the Threshold in order the Digitizer to self trigger Path1 Tab GENERAL gt Section ACQUISITION SETTINGS Action1 Press the SOFTWARE TRIGGERS ON OFF button to enable a software trigger to be continuously issued e OFF Software Trigger is disabled e ON Software Trigger is enabled 2 DPP CI Control Software CAEN Nn Electronic Instrumentatio Acquisition Settings Acquisition Acquisition Mode Oscilloscope v Stop Time S Histogram Params SW Triggers Single Configuration File
56. in frozen for the whole duration of the gate and then it starts again to follow the signal To freeze it for the whole signal width you must adjust the gate and trigger hold off parameters Instructions on how to change those parameters are explained in the following steps When choosing the fixed value for the baseline the baseline remains frozen for the whole acquisition window as you can see in the following plot e gnuplot graph e i Waveform Ch0 2200 f 2150 F ADC counts 2100 2050 2000 f 0 850075 2136 64 us 1 Input 2 Baseline 14 1 6 Note The oscilloscope plots above has been displayed using the auto scale function of gnuplot press a on your keyboard to activate the auto scale We choose the first method for the baseline calculation It is now possible to set the trigger threshold For this purpose the parameter THRESHOLD is defined as the relative absolute value of the trigger threshold with respect to the baseline UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation Path7 Tab CHANNELS gt Section1 DPP SETTINGS gt Section2 COMMON SETTINGS Action1 set a value of THRESHOLD in the box menu according to the noise level of the input signal baseline In our example we fix 15 LSB as threshold level DPP CI Control Software CAEN n Electronic Instrumentatio General NDE Stats Output Logger Ch
57. ished in the Runner section the Status field shows the Connected value e Restart button restarts the software causing the board to reset and to reprogram with the actual parameters the communication is unaffected The Tab Channels DPP CI Control Software CAEN Nn Electronic Instrumentatio General KAET OG Histogram Stats Output Logger comesunsro S General Settings Channel Enabled DC Offset or Copy Settings Pulse Polarity POSITIVE v auuey Yyoed 104 SBulyas JENpIAIpu DPP Settings Threshold 100 LSB Gate Gate Offset Common Settings Self Trigger ENABLED v Baseline Mean 8 Pre Trigger i 1200 ns Charge Sens 40 fc LSB sjauueu Je 104 sgUl1Jas UOWWOJ Trigger Hold Off OH ns ore Pltistogram v Fig 7 6 Tab Channels The Channels Tab is the core of the DPP Cl Control Software where it is possible to set all the required parameters for the DPP Cl algorithm The tab consists in the Channel Settings For field with the sections General Settings DPP Settings Common Settings Through the Channel Settings For menu it is possible to select the channel which the parameters are referred to The channels are selectable either through the drop down menu or through the slider Two macro areas can be noticed the deep grey area for the individual settings of each channel and the light grey
58. l parameters set for the same channel has to be reported after a i keyword where i is the number of the channel section 0 ENABLE_INPUT YES setting 1 of channel O section DC_OFFSET 40 setting 2 of channel O section 1 ENABLE INPUT NO setting 1 of channel 1 section DC OFFSET 40 setting 1 of channel 1 section Each parameter not present in the Individual Settings section is intended to assume the value defined in the Common Settings section Each command has a description where there are shown the different options to modify it The commands are textual so it is very easy to modify the different parameters UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Example 1 Enabling the External Trigger with no propagation Go in the EXTERNAL_TRIGGER section and modify the EXTERNAL TRIGGER line from EXTERNAL TRIGGER DISABLED to EXTERNAL TRIGGER ACQUISITION ONLY In this way the board will be ready to accept an external trigger Other commands must be modified with numerical values and in this case the units are expressed in the description Example 2 Setting the Pre Trigger value PRE_TRIGGER pre trigger size in number of samples options 1 to 511 The relative command line will therefore be PRE TRIGGER 500 In the Configuration File is even possible to manually modify the registers of the board within the Write Register section For more details about the re
59. line The baseline calculation is an important feature of the DPP Cl Firmware since the integration of the input signal uses the baseline value as a reference Moreover most of the DPP parameters are related to the baseline values too This paragraph describes in detail how the baseline calculation works The user can choose to set a fixed value for the baseline or to let the DPP firmware calculate it In the first case the user must set the baseline value in LSB units where 1 LSB 0 48 mV for 720 series In the latter case the baseline is dynamically evaluated as the mean value of N points inside a moving time window The user can choose the N value among 8 32 and 128 The baseline is then frozen from few clocks before the gate start to the end of the maximum value between the gate and the trigger hold off After that the baseline starts again the calculation considering in the mean calculation also the points before the freeze This allows to have almost no dead time due to baseline calculation Fig 2 3 shows how the baseline calculation and freeze work The trigger threshold dynamically follows the variation of the baseline Trigger Hold Off e e ee e Ay Vase So cigs mmm eee meme eemmmeeesoofccoms i Baseline e i Trigger See Hand Threshold e estart eee Fig 2 3 Baseline calculation as managed by the DPP CI algorithm UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation DPP CI trigg
60. mat iorririorssidisernisiseenrotereisssin EET Elers res SEERE dupes Enkie 18 Dota BIOCK oere ET E E nd se E E E E E EE TE E E E TO 19 D SENN STI O Oen EEE E E E E EO 20 AMOET E E EO E ee 20 Ve 1 E E E E A E O E E E O E E E E 20 RIWI e e E E E A E E E on ence E O 20 BEE EE E E A E EEE EAE E A AAA A IENE AAA AAEE AA A A A E 21 Fik ware anad EAST sarrendi rn a EE A E E 22 Practical Use aecocseausaveaassminenasmesansemuneseaiesnenay seen anieaaieamadenainansaanesinan erne en es tortes tt st seest tutt st stes Eerst st ste en en even een en ennen 24 6 COINCIDENCES and Synchronization ccceccccccsceccccccnceccccccscsccccccecsceccccscececcccecsceceececs woe 7 Software lInterface esessesessesesescecescecescecescesesoecoesoecesssoeseececsscesescesesoesesoesesoeosesesesoeo une DUVET OG BES ss A Ea re srt 53 Block Diagram Mrrcece sanyccqsawancnpseeenace cenmeaiceay cenaoreqnesuvs cnsnsacqeusapcoasynt aesauaw ene suesunen sqsqeaesnncavaneearnalenrsemmsacqactaneapenemecesaaneacganess 53 DRIVES e EIST AIO SEE E ES I E eras neacaiusnuaeanattaneaias A 54 DOPING SEE EEE E EEE E E E T E S A A A EAE AAO E NE A E AETS 54 Eo a e E E E EE EE A ee E E E E E E E re 54 ME MO e e E E E E O 56 CUE SSCA OW SEE A EAE E E AEA EAE E A 57 The Tab RC la i EERE AE EENE OE T EESE EEN EEE 58 The Tab Chanmmels 2 EEN ERE EEA E E ENEE E EEE 60 The Tab Oscilloscope cccccccssscccccsssecccceseccesaeneccesaeeeeeeeaeseeeesseeeeeeseeeeeeeeeeaeeeeesaeseceesaa
61. n Cancel Fig 7 14 Warning message about data saving UM2089 DPP Cl User Manual rev 1 CAEN Electronic Instrumentation The Tab Logger DPP CI Control Software CAEN Nn Electronic Instrumentation General Channels Histogram Stats Output BRUS Configuring system Using temporary path C Users Paola AppData Local Temp Reading configuration file Using formats onnected to CAEN Digitizer Model DT5720B ROC FPGA Release is 04 01 Build D411 PGA Release is 1 Warning firmware TSt Sashen Press 0 7 to select the channel to plot Reading configuration file Using format ASCII Plot type waveforms Reading config line Reading config line Reading config line Reading config line Reading config line Reading config line Plot type energy histogram Log scale disabled Plot type time histogram Plot type energy histogram Plot type time histogram Pint tina anarnw hictanram Fig 7 15 Tab Logger In the Logger Tab the user can read board and firmware information Fig 7 15 and have a direct view of the parameters values and the mode options being set during the current program session The session log can be saved on disk by using the Save Log button UM2089 DPP CI User Manual rev 1 70 CAEN Q Electronic Instrumentation Config File Sintax The Graphical User Interface GUI interacts with the board through a Configuration Fil
62. n the Drivers amp Libraries section CAEN provides the full installation package for the DPP CI Control Software in a standalone version for Windows OS This version installs all the binary files required to directly use the software i e no need to install the required CAEN libraries in advance The installation package for Linux OS needs other libraries to be installed apart e Download the specific DPP CI Control Software installation package for your OS from CAEN website in the Download area at the DPP Cl Control Software page login required to download e Extract files in your host For Linux users e Click on the red link above the DPP Cl Control Software package to download the required CAEN Libraries e Install the libraries in the following order 1 CAENVMELib 2 CAENComm 3 CAENDigitizer The installation instructions can be found in the README file inside each library folder e Install the DPP Cl Control Software according to the installation instructions of the Setup Linux Readme txt file inside the program folder Launch the Control Software typing DPP Cl_ControlSoftware For Windows users e Launch the DPP CI Control Software installer and complete the Installation Wizard e Run the DPP CI Control Software GUI by one of the following options 1 The Desktop icon for the program 2 The Quick Launch icon for the program 3 The bat file in the main folder from the installation path on your host UM2089 DPP CI
63. ne value is set by the ABSOLUTE BASELINE parameter UM2089 DPP CI User Manual rev 1 34 CAEN Q Electronic Instrumentation Path5 Tab CHANNELS gt Section COMMON SETTINGS Action1 set the BASELINE MEAN to 32 in the scrolling box menu Those values correspond to the number of samples used in the baseline calculation 2 DPP C Control Software CAEN Nn Electronic Instrumentatio General KSETu Oscilloscope Channel Settings For Channel 0 General Settings Channel Enabled DC Offset Pulse Polarity NEGATIVE v LSB Gate Gate Offset Common Settings Self Trigger Baseline Mean Pre Trigger Charge Sens Trigger Hold Off Pon foscttoscope v A1028 MES oo Action2 set the BASELINE MEAN to Fixed in the scrolling box menu and set the absolute value for the baseline according to the waveform plot DPP CI Control Software CAEN Nn Electronic Instrumentatio General KA Etu Oscilloscope Stats Output Logger Channel Settings For Channel 0 ina 4 ful General Settings Channel Enabled DC Offset or Copy Settings Pulse Polarity NEGATIVE DPP Settings Threshold LSB Gate ns Gate Offset ns Common Settings Self Trigger ENABLED v 2 180 LSB Pre Trigger 120 N Charge Sens fc LSB Trigger Hold Off o gt PON foscutoscope
64. nels The main issue in the synchronization of a multi board system is to propagate the sampling clock among the boards This can be made by FAN IN of an external clock into the CLK IN front panel connector of each board or only in case of VME models propagating in Daisy chain the clock along the digitizers through the CLK IN CLK OUT front panel connectors One board has to be chosen to be the master board that propagates its own clock internal or external to the others A programmable phase shift can adjust possible delays in the clock propagation This allows to have both the same ADC sampling clock and the same time reference for all boards Having the same time reference means that the acquisition starts stops at the same time and that the time stamps of different boards is aligned to the same absolute time There are several ways to implement the trigger logic The synchronization tool allows to propagate the trigger to all boards and acquire the events accordingly Moreover in case of busy state of one or more boards the acquisition is inhibited for all boards Refer to RD9 for more details on how to synchronize CAEN digitizers UM2089 DPP CI User Manual rev 1 52 CAEN Q Electronic Instrumentation 7 Software Interface Introduction The DPP CI Control Software is an application that manages the communication and the data acquisition from digitizers where the DPP CI firmware is installed The software allows the user
65. nt w Calibrate MB Log Scale Histogram E Fig 7 10 Tab Histogram The Histogram Tab contains in the Histogram Plot section all functions for plotting the Energy or Time Histograms The Histogram Plot section includes the following settings e Plot Display buttons The ON OFF button enables disables the continuous plotting of the histogram In the OFF position it is possible to update manually the plot by pushing the Single button The Clear Histogram button clears the histogram i e resets the plotting to zero e Active Plot Channels menu selects the channel whose signals are visualized Only one channel at a time can be plotted The selected channel has to be checked in the Tab Channels e Plot Mode check cells selects if a Energy or Time histogram has to be visualized e Trace Selection menu that includes o Trace 1 Energy Time Histogram when Energy Time plot mode is enabled In the Energy Histogram pile up events are not included Time Histogram is intended to be the histogram of the time intervals between subsequent triggers o Trace 2 menu for Energy plot mode only enables disables the visualization of the Energy Histogram Corrected by adding the redistribution of the pile up counts Trace 3 to the Energy Histogram Trace 1 o Trace 3 menu for Energy plot mode only enables disables the visualization of the Rejected Pulses Histogram
66. o RD4 DPi i 1 4 m 0 1 n 2 Digital Virtual Probe value i for sample m DP1 is always the Trigger probe value DP2 is always the Gate probe value DP3 is the value of the probe written in DP3 flag DP4 is the value of the probe written in DP4 flag Sw m 0 2 4 n 2 Even Samples of input signal at time t m If DT 1 S corresponds to the Baseline at time t m 1 Sm m 1 3 5 n 1 Odd Samples of input signal at time tzm Q integrated Charge value Note when the Dual Trace option is enabled half of the samples are used to store the baseline Therefore only the remaining half samples are used for the input waveform In the plot visualization each input sample is duplicated to keep the same granularity Those who need to acquire waveforms with full resolution should disable the dual trace option UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Board Aggregate Data Format For each readout request occurring when at least one channel has available data to be read the interface FPGA ROC reads one aggregate from each enabled channel memory No more than one aggregate per channel is read each time The sample of Channel Aggregates is the Board Aggregate If one channel has no data that channel does not come into the Board Aggregate The data format when all 8 channels of a VME have available data is as shown in Fig 4 3 where BOAR
67. oincidences among different channels and synchronization of different boards Coincidences Acquiring coincident events from different channels is a common task in physics Through the DPP firmware each channel of the digitizer can trigger independently from the others and generate a trigger request All the trigger requests can be sent to the common ROC FPGA see Fig 1 1 for the coincidence evaluation The ROC can be programmed to look for triggers within a programmable window through the Individual Trigger Logic ITL that can perform the logic operation of AND OR or Majority When the coincidence condition is met the ROC sends back a trigger validation signal one per channel The coincidence logic is individual so that it is possible to program different coincident conditions for each channel The trigger validation enables the data saving into the memory buffer In this way the channel uses its local trigger for the event building time stamp gate etc but only those events having the validation are saved into the memory More information and detailed instructions on how to make coincidences among channels of the same board can be found in RD4 Synchronization among different boards In cases when multi board systems are involved in the experiment it is necessary to synchronize different boards In this way the user can acquire from N boards with Y channel each like if they were just one board with N x Y chan
68. one DPP CI Control Software full installation package on CAEN website in the Download area at the DPP Cl Control Software page login is required before the download Unpack the installation package launch the setup file and complete the Installation wizard o DPP CI Control Software for Linux Download the DPP Cl_ ControlSoftware xxx tar gz package on CAEN website in the Download area at the DPP CI Control Software page login is required before the download Unpack the installation package tar zxf DPP Cl_ ControlSoftware xxx tar gz UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Follow the instruction on Setup Linux Readme txt Type configure make sudo make install Launch the Control Software typing DPP CI ControlSoftware Note in the Linux environment it is required to first install CAENVME CAENComm and CAENDigitizer You can find L those libraries in the CAEN web page In the Windows environment all libraries come within the control software package Firmware and Licensing The DPP CI Control Software controls digitizers running the DPP CI Firmware V How to install the firmware Download the DPP CI Firmware cfa for 720 series on CAEN website in the Download area at the DPP CI page Download the CAENUpgrader software to upload the firmware on your board The program full installation package for Windows OS is available on CAEN website in the Download area at the
69. onfiguration section includes UM2089 DPP CI User Manual rev 1 Configuration File buttons store Export and recall Import the configuration of the software and the parameters for the acquisition The user can so easily manage the different parameters during different acquisitions Restore resets online the parameters to their default values 58 59 CAEN Electronic Instrumentation The Runner section shows the status of the connection between the board and the Control Software It is made of Status label shows the status of the connection Label Options Status Disconnected Status Connection OK Status amp Can t open the digitizer It is duplicated in the Connection window e Connect button opens the Connection window Fig 7 5 Connection x CAEN n E Ctronic instrumentation Status Disconnected m amp Parameters Connection Type ME Link Number of Board Number ok Base Address VME Devices Only 0x 0 Fig 7 5 Connection Window In this window the connection parameters can be set e Connection Type menu selects between USB or OPTLINK according to the way the board is connected to the PC e Link Number box sets the number of the port used in the connection and is valid for multiple boards connection e Board Number box indicates the number of the desired boar
70. ose to set Ne 60 number of events per buffer hence buffer_size in locations 52 60 3120 loc Supposing that the memory board is made of 128k loc ch the number of buffers will be 128k 3120 42 buffers This value corresponds to the maximum number of buffers that the memory can contain However since the programmable value must be a power of two the user has to choose the closest number smaller than 42 which can be represented as a power of two that is 2 32 i e Nb 5 has to be written in the BUFF ORG register Example2 suppose that the mixed mode is enabled and Ns is set to 24 samples Event size in locations 1 Time_ Stamp Ns 8 Waveform 1 Charge_Baseline 5 loc Having a small event size is it convenient to divide the memory into few buffers of bigger size to store a large amount of events UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation Suppose to have set Nb 3 so that the number of buffers is 8 Supposing that the board memory option is made of 64k locations each buffer consists in 64k 8 8k locations and so the resulting number of event per aggregate should be Ne 8k 5 1639 IMPORTANT in this case the real number of events stored per aggregate is 1023 due to the register length constraint already mentioned Event Data Format When the data readout is performed the data format will appear as follows Channel Aggregate Data Format for 720 series The
71. ry _ ideal real 50 2V T t i 0 I TE I l d OV 50 i I l I l a I 2 V l pan Fig 7 7 Input signal DC offset adjustment description e Pulse Polarity menu selects the polarity NEGATIVE POSITIVE of the input signal to be processed by the DPP CI algorithm The algorithm is internally designed to work with negative pulses When the analog input pulses are positive it is necessary to invert them before the DPP algorithm is applied in this case the option PULSE POLARITY Positive enables the internal inversion of the pulse polarity Note that the inversion is applied to the DPP algorithms only while it doesn t affect the waveform recording both plots and output files keep the original pulse polarity With negative analog input pulses use PULSE POLARITY Negative e Copy Settings button copies the general settings of the current channel to other channels The DPP Settings section includes e Threshold box sets the absolute value of the trigger threshold referred to the input pulse baseline The value is expressed in LSB The value in mV for 1 LSB can be calculated according to the board input range For a digitizer of the 720 series with 12 bit resolution and input range of 2 Volts the LSB is LSB 2 2 0 488 mV e Gate box sets the gate width parameter for the charge integration of signals Values are expressed in ns and vary in steps
72. s Acquisition Acquisition Mode Histogram m Stop Time 0 S Histogram Params Energy and Time v SW Triggers Configuration Runner Configuration File Export Import Restore Status Disconnected Pore storm v Fig 7 4 Tab General The General Tab is divided into three sections Acquisition Settings Configuration and Runner The Acquisition Settings section includes Acquisition button starts and stops the acquisition OFF acquisition is off ON acquisition is on It is duplicated in the Common Bar Acquisition Mode menu selects between the Oscilloscope mode where the raw waveforms can be visualized and saved and the Histogram mode where the spectra can be visualized and saved This command is duplicated in the Common Bar Stop Time box sets the value in seconds for the Real Time acquisition in Histogram mode At the end of the fixed time visualized in the Acquisition Time window of the Common Bar the acquisition is automatically stopped Set Stop time to O for an infinite acquisition time Histogram Params menu selects the data that the Digitizer provides for the Histogram acquisition mode Energy only Energy and Time SW Triggers buttons start stop a software trigger input from the computer to the board in a continuous ON OFF or single shot Single way The C
73. s written by the user the program generates the output file with a default prefix Action3 in the RUN NUMBER text box write the run number This number automatically increase by one unit when you start a new acquisition through the ON OFF Acquisition button Path2 Tab OUTPUT gt Section2 OUTPUT FILES Action4 click on the LIST checkbox select the data writing format between ASCII and BINARY and press the ON OFF button to start stop the output file writing w DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels Oscilloscope Histogram Stats Output Output Directory C UsersitestiDesktop Output File Prefix dump Run Number 001 Output Files Histogram Mode List Dumping aaa Time Histogram i J Format ASCII l Hd Energy Histogram Action5 press the ACQUISITION ON OFF button to start stop the acquisition session Action6 check the file saved in the selected destination folder The file format for the current acquisition data is dump 001 Is 0 dat where dump is the chosen prefix Is stands for list 001 is the run number and 0 is the channel number The file is a 2 column file where the first column is the time stamps of each triggered event and the second column is the charge UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation 6 Coincidences and Synchronization The DPP CI firmware allows for c
74. seceeseeeeeeesaeseceesausecessagaeceesauaeeeesages 63 The Tab RTO aM oeii EENS ns nc ENEA E AE hens nc ES A AR pede ean ees 65 TRE Tap Stals rsca iena E E E O E E eos 67 mne gt al 0 e E E A E E EEA A AE EE 68 TAE ToD CORBEI ES A E E E a e A EEEE TEA E E 70 CONE FIE SN oea E E T E cant E E E 71 Notes on Firmware and LIC NSING cccccsssccccsssccceeececceecccsenecceseuceesseccssaueeeseeeseeseueeeesaueeessuseeseaecesseuecessaeseesanses 73 6 TERNI SU OU strona cece esate dacs tesa OET EEEE 74 List of Figures Fig 1 1 Simplified block diagram Of the Digitizer siccccscccsessevsevescssavsaeverewseseesivocssanseseassnerssevensusedsasivncusvaressusssiancaneatescdsdsieeewseasesiueessetiwed 7 Fig 2 1 functional block diagram Of DPP Cl firmware icccavecicicecscnsccaveascecssscsucoasedsceuwvearsesoceassacbancessvdcnenveatuncaueabsnsdsedbussatecdwedatadpweseasabwas 9 Fig 2 2 Diagram summarizing the DPP Cl parameters The trigger fires as soon as the signal crosses the threshold value Gate Gate Offset Pre Trigger Trigger Hold Off and Record Length are also shown for one ACQUISITION window cccceeceeeeeeceeeeeeeees 10 Fig 2 3 Baseline calculation as managed by the DPP Cl algorithm cccccccssssecccceeeceeceescceeeaeseccesaeeceeseeeceesuaaeeeesaeaeceesauaeeeesaees 11 Fig 2 4 Diagram showing the structure of the trigger management of the DPP Cl firmWware cccccccssssecccceeeeeeceeeceesaeeeeeesaees
75. seesages 53 Fig 6 2 Libraries and drivers required for the DPP CI system csccccccsssecccceseeceesessececsauseceeseeeceeseeseceesaeaeceeseeaeeeesaeaeceesaaeeseesages 55 le CONINIION E FEE E A E A A A E 57 PEGA TID GENEIN oasen E E agwarantesqeduen ahualacnecsad tev acwesanbesgaanepeseeseunesseaeuece 58 res Ea E EAL S A E E EEE AN A A E E E E E A A EE EE 59 AAA E E a E E ANAE A AAA E AIA E EAE A AE E E A N EA 60 Fig 6 7 Input signal DC offset adjustment description esssensssseensssreresrreresrrrresssrressrrrrsssrersssreressreressreressreressreressreressneressneresseeee 61 ECS FD OSMOS EEN T eee 63 Fie 6 9 the iacr Settings VV ING OW sas niea ai i a EAEE ASE E a E NAE TSA O 64 eee FAD A OTN e A acid AEE O E A EEE ANNO T EAE 65 Fig 6 11 Energy Calibration window cccccccssseccecsesececcaeseccecseeceeeeaeeceeeeseeeeesuseeeessaaseceesaeeceesaeseeeesaaseeeesauseceesaaaecessaaaesessageeeesages 66 eGA Vs a EE E EEE OEE E EEE E AE E E E 67 FM OUT ra N A E E T nave atpesbaceenesveseawspaubeness 68 Fig 6 14 Warning message about data saving sossenssssenessreeesssrrresrreresrreressreressrrressrrressrrressstrrossrrresssrresserressrrresseeresrereesseeressenee 69 FS ie Weller a SEE E EATA A AAE A S E T E E S E E O E IA E ETA 70 Fig 6 16 Firmware unlicensed warning message ssssesessreresssrrrsssrrressrrressrrressrrressrrrrsssrerssrerossrerossreressreressreressreresseeressreresseeee 73 List of Tables
76. t TRG HoldOff in the menu DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels KOKAT GHY LUE Stats Output Logger Oscilloscope Plot Plot Display Active Plot Channe ON nme Channel 1 Channel 2 Plot Mode Channel 3 wave FFT Trace Selection Trace Settings Dual Trace Record Length 4005 1600ns Analog Trace 1 Input ai hm Analog Trace 2 Baseline ma hm Digital Trace 1 Trigger inal Wn costs Sth Digital Trace 2 Trace Variable TRG HoldOff v Digital Trace 3 H External TRG i om Trace Offset A l Digital Trace 4 Over Threshold Trace Gain Over Threshold TRG Validation TRG HoldOff coincidence BSI 0 05 gnuplot graph Waveform Ch0 1 Input 2 Baseline 3 Trigger 4 Gate 6 TRG HoldOff n 5 o oO Q lt 1 45693 1711 64 UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Path2 Tab CHANNELS gt Section COMMON SETTINGS Action1 Set the TRIGGER HOLD OFF value in the box menu The Trigger Hold Off goes in steps of 128 ns If you set a custom value as for example 800 ns the DPP CI Control Software automatically resize the value to the closest upper value i e 896 ns
77. t Digitizer If no license is found a pop up warning message shows up and reports the time left before the acquisition is stopped trial version In order to unlock the DPP firmware and use it without any time limitation you need to purchase a license from CAEN Refer to RD8 for detailed instructions on how to use CAENUpgrader and the licensing procedure UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Practical Use The following step by step procedure shows how to use the DPP CI Control Software see Chapter 7 in an application of gamma ray detection how to set the relevant DPP parameters and plot the signals Oscilloscope mode how to display the energy histogram Histogram mode and how to save the acquired data Check that the whole hardware in your setup is properly connected and powered on L Note After typing the value of a parameter in a box menu press the Enter key on your keyboard to activate the setting 1 Run the software After the DPP CI Control Software installation run the DPP CI Control Software GUI according to the options selected in the installation wizard choosing one of the following options e The Desktop icon for the program e The Quick Launch icon for the program e The bat file in the main folder from the installation path on your host UM2089 DPP CI User Manual rev 1 24 CAEN Q Electronic Instrumentation 2 Connect to the Digitizer Path1 Tab GENERA
78. tatio Channels Channel Settings For Channel 0 General Settings Channel Enabled NEGATIVE jw Common Settings Self Trigger Baseline Mean Pre Trigger Charge Sens Trigger Hold Off PON feistogram v UM2089 DPP Cl User Manual rev 1 48 49 CAEN Q Electronic Instrumentation Path4 Tab HISTOGRAM gt Section HISTOGRAM PLOT Action1 set channel 0 in the CHANNELS list box Action2 check Energy as PLOT MODE Action3 check Energy Histogram as TRACE 1 Action4 select count as ENERGY X AXIS This means that the X axis are the bin numbers in ADC counts Action5 Press the ENERGY PLOT ON OFF button to issue the energy histogram continuous plotting e OFF Plot displaying is off e ON Plot displaying is on w DPP CI Control Software CAEN Nn Electronic Instrumentatio General Channels Histogram Plo Active Plot Channet Channel 1 Channel 2 Channel 3 Plot Mode Energy ime Trace Selection Trace 1 A Energy Histogram Trace 2 Energy Histogram Corrected Trace 3 Pulse Rejection Histogram X Axis Unit count iN BB Log Scale Po mr UM2089 DPP Cl User Manual rev 1 CAEN Q Electronic Instrumentation Path5 Tab GENERAL gt Section ACQUISITION SETTINGS Action1 set 120 seconds as STO
79. tings For Channel 0 NEGATIVE v DPP Settings Threshold LSB Gate Gate Offset Common Settings Self Trigger v Baseline Mean amp j Pre Trigger 487 ns Charge Sens 40 M fc LSB Fel Trigger Hold Off 896 7 ns ON Oscilloscope v 10 94 MB s FEER Oscilloscope Histogram UM2089 DPP Cl User Manual rev 1 46 CAEN Q Electronic Instrumentation You can check that the readout rate is significantly reduced Path2 Tab STATS Action1 check the readout in the left banner of the tab under READOUT RATE The same parameter is written in the bottom box common to all tabs DPP CI Control Software CAEN N Electronic Instrumentatio General Channels Histogram File Output Logger Readout Rate Trigger Stat Channel ICR KHz PUR Run Time s 13 91 0 0 26 91 ON Histogram v 26 915 UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Path3 Tab CHANNELS gt Section COMMONS SETTINGS Action1 set CHARGE SENS on 160 in the box menu The charge sensitivity allows to rescale the signal charge This is useful especially when the charge exceeds the full scale range OxFFFF in 16 bits In case of saturation only a spike corresponding to the overflow events is visible in the histogram plot DPP CI Control Software CAEN Nn Electronic Instrumen
80. to select proper communication and DPP settings Waveforms and histograms can also be plotted in real time for one channel at a time as described in the GUI Description paragraph L Note DPP CI Control Software is not provided with data analysis tools Block Diagram The DPP CI Control Software Fig 7 1 is made by different parts there is a user friendly java GUI that allows to easily configure all the relevant parameters for the DPP CI acquisition The GUI directly handles the Acquisition Engine DPPRunner through run time commands and generates a textual configuration file that contains all the selected parameters values This file is read by DPPRunner a C console application that programs the Digitizer according to those parameters DPPRunner can also start stop the acquisition and manage the data readout Data both as waveforms and list of time stamps and energies time can be plotted using the external plotting tool gnuplot or saved to output files and analyzed offline DPP CI Control Software Plot Data File Run Time commands Plots DPPRunner gnuplot Config File Output Files waveforms histograms lists CAENdigitizer Third party spectrometry analysis tools CAENcomm iak aL y y Drivers Fig 7 1 The DPP CI Control Software block diagram 53 UM2089 DPP CI User Manual rev 1 CAEN Q Electronic Instrumentation Drivers amp Libraries Drivers In order to deal with the hardware CAEN provides t
81. ut Iv fr Analog Trace 2 Baseline meen Trace Enabled Digital Trace 1 Trigger l rt fr ERE yt Gate Digital Trace 2 ER Digital Trace 3 R External TRG lv R Trace Gain Digital Trace 4 Over Threshold x ED qee E 00s gnuplot graph Waveform Ch0 Trace Offset E DRED JR DE he MALE st hl PR DER Het f Fe fin fo 1 Input 2 Baseline o E oa o O Q lt 1 20347 1941 65 UM2089 DPP CI User Manual rev 1 3 Trigger 4 Gate 40 41 CAEN Q Electronic Instrumentation Path2 Tab CHANNELS Section DPP SETTINGS Action1 First adjust the GATE OFFSET value in the box menu This value corresponds to the number of ns the gate will start before the trigger Indeed the input signal is delayed by the Pre Trigger value so that the gate can start before the trigger Gate Offset and Pre Trigger must follow the relation Gate Offset lt Pre Trigger 28ns We set the gate offset value to 20 ns w DPP CI Control Software CAEN Nn Electronic Instrumentatio General KATUJE Stats Output Logger Channel Settings For Channel 0 4 ful General Settings Channel Enabled DC Offset of Copy Settings Pulse Polarity NEGATIVE v LSB Gate Gate Offset Common Settings Self Trigger Baseline Mean Pre Trigger Charge Sens
82. well The board registers involved are the following e BUFF_ORG Nb defines the total number of buffers i e aggregates in which the memory is divided num buffers 2 e NEV_AGGREGATE Ne defines the number of events contained in one aggregate The maximum allowed value is 1023 e RECORD LENGTH Ns defines the number of samples of the waveform if enabled Ns 8 CUST SIZE for 720 series where CUST SIZE is the value written in the register e CONFIG defines the acquisition mode and the event data format Va Note Those who need to write their own DAQ software must take care to choose the Ne value accordingly to the event and buffer size as explained in the examples in the next section For a detailed description refer to the specific User Manual and RD5 Information about the use of these parameters in the CAENDigitizer library can be found in RD6 According to the programmed event format an event can contain a certain number of samples of the waveform one trigger time stamp the charge Q and the baseline UM2089 DPP CI User Manual rev 1 14 15 4 CAEN Q Electronic Instrumentation 720 series The physical memory of a board is made of memory locations each of 128 bit 16B In terms of location occupancy Trigger Time Stamp 1 location Waveform if enabled 1 location every 8 samples Charge Q and Baseline BSL 1 location Fig 4 1 shows how the data is saved into the physical m
83. window expressed in number of points 1 point 4 ns for the 720 series O Analog Trace 1 menu selects the first analog trace to be visualized in the plot that is the input pulse o Analog Trace 2 menu selects the second analog trace to be visualized in the plot that is the baseline Analog Trace 2 is not plotted if Dual Trace is disabled o Digital Trace 1 menu selects the first digital trace to be visualized in the plot that is the trigger o Digital Trace 2 menu selects the second digital trace to be visualized in the plot that is the gate o Digital Trace 3 menu selects the third digital trace to be plotted External TRG the external trigger signal when enabled UM2089 DPP CI User Manual rev 1 CAEN Electronic Instrumentation Over Threshold digital signal that is 1 when the input signal is over the requested threshold Shaped TRG logic signal of programmable width coming out together with the trigger This is useful to externally propagate the trigger and to acquire in coincidence mode refer to RD4 TRG Val Acceptance Win logic signal corresponding to the time window where the coincidence validation is accepted The validation enables the event dump into the memory see RD4 Coincidence logic pulse set to 1 when a coincidence occurred refer to RD4 o Digital Trace 4 menu selects the fourth digital trac

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