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GD2473 - SiPM Development Kit QuickStart Guide This
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1. STOP PROGRAM PROGRAM x Coincidenc onGPO i PRINT DISPLAY DISPLAY Fig 2 2 GUI main panel 2473 SiPM Development Kit QuickStart Guide 8 CAEN Electronic Instrumentation The DIGITIZER tab In the digitizer tab is possible to set all the parameters requested by the digitizer the active channel the input DC offset the channel threshold the trigger mode the trigger the gate and the baseline parameters and the settings for the coincidence The tab include also information about connection and errors Acquisition settings sub tab START DIGITIZER ON 3 connection amp errors acquisition settings input DC offset 9 ch 0 7 0 threshold ch 0 2 30 input DC offset 9 ch 1 5 0 thresholdch 1 2 10 trigger mode externa mM internal gate ns e coincidence OFF Jo coinc time F Lf ko no flat ns 512 Coincidence on GPU Fig 2 3 Acquisition settings sub tab i START DIGITIZER the digitizer tab is inactive till the digitizer is Pesce ee on O on Pushing the START DIGITIZER button the software create TEN a link with the physical device After the green light the parameters tab become active cho chi CHANNEL ON OFF the channels involved in the data readout of the digitizer When one channel is active the correspondent ON OFF input DC offset and threshold controls are enabled input DC offset
2. 40 50 50 70 80 90 100 110 Threshold mV min thr mV ns points for mean GE MD v l I I I I l I I I I F 15 P I 111 I IIII l IIII II I1 l M7 5 500 250 0 1 5 10 15 2 maxthr mV mm laoo tewidth ms 4 m ERETTE U 100 gat Pu uu 1 41 1 JU LU 7410 4000 2000 0 1 500 1000 1400 step mW A 10 I 11TII JITTITITTIPTII1 i a 1 400 500 PSAU name file user save staircase PO Cc OFF REFRESH Fig 2 11 PSAU staircase tab Plot data can be saved by the save staircase button with a user defined prefix of the output file written in the PSAU name file user field 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation The PSAU counting tab plots the frequency of the signals over the threshold set in the Discriminator tab for the active channel The user can change the number of points for the plotted mean value and the gate width for the counting ACTIVE CHANNEL z 5 i T Histogram charge vs time wave 2 channel Histograms PSAU staircase PSAU counting ni 0 frequency kHz H SI current Frequency kHz 2 zoom out Hl H zoom in points for mean QU mm 0 PEPE prerrryprureryprureidry A 1 10 20 30 40 gatewidth ms 0 AM 10 1 10 20 30 40 50 Fig 2 12 PSAU counting tab 2473 SiPM Development Kit QuickStart Guide
3. By now the system is ready for digitizing the signal but rather than doing it in a blind way it is worth taking a guided tour of the system features going to the VISUALIZATION panel and switching ON the WAVE mode The WAVE panel displays the most relevant information a The digitized analog INPUT b The signal BASELINE c The integration GATE triggered externally or internally by the Digital Pulse Processor The BASELINE can be calculated according to the parameters specified in the corresponding sub panel namely e The number of samples used to calculate the mean value e The threshold used to avoid including in the mean value signals which could bias the baseline value Whenever the signal exceeds the threshold while the baseline is being updated the averaging procedure is frozen 2473 SiPM Development Kit QuickStart Guide 28 29 CAEN Q Electronic Instrumentation e The no flat time specifying the time interval between two updates of the baseline value The flat time can also be shown in the WAVE display The GATE actually defines the integration time and its edge may be triggered in different ways see below Once the GATE is open its characteristics are associated to three parameters specified in the GATE sub panel e The width e The pre gate fully exploiting the digital power for the optimal timing with respect to the signal It defines the position of the GATE with respect to the trigger edge with the possibi
4. CAEN Electronic Instrumentation SP5603 Mini Spectrometer Mechanical structure for optimal SiPM to crystal coupling Crystal dimensions 3 x 3 x 15 mm Included crystals LYSO BGO Csl One SiPM 3 x 3 mm embedded e Dimension 40 mm D 35 mm L The SP5603 is a mini spectrometer for gamma ray detection The spectrometer is composed by a mechanical structure that houses a scintillating crystal coupled to a dedicated 3 x 3 mm SiPM Three crystals LYSO BGO Csl are also provided The spectrometer s design allows an easy connection to the SP5600 39 2473 SiPM Development Kit QuickStart Guide 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 Acguisition 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 Klingens
5. PUIDOSS STN 0 i ne Verran E E ro a E 2 Change Document RECOM csssecsssessssessssessssesscsessssesscsesecsesecsesecsesscsessesessesesucsessescsussesueaessesessesesucsessesesecsesucaesucaesseaesucsesscacseeseseesceneees 2 Symbols abbreviated terms and notation eceesesssssssessessssscsecsssscsecsssscsecsesscsecsssassucsecsssscsessssucaesscsucsesaeeacsucaesassucaesacsucaeeacsecsscsees 2 Fe SN SO TNS ES sos ND pn tauren 2 Index sccsscescassseensunssectecsncessscccunsscesestenesstsseccesesssnassduanedscyssnnesesdunaessensonactsaascsonssesossassseteasaenseestsserseecse LiStoPPIGULES saae cotecceisusincastsevacecvesessescctusussseccsvevaceteusvrsssevese0ssutdussoleutsacesstavetesnccssacsadiaieds 3 3 List of TAOS si bo utca bhuh nona oc i0c s vosn e o EE Spor ccc cii A 5 7 1 System OVervieW iiseissii suoel n so siaha i vadax voz a hovo oki v z dva oa vala 2 KC CENING SCPE OG sss2s50s 506 oo E onko bo ko os E non bobo SoftWare Pasta alli s r i on 7 GUAN PANE hs s AN OA ONA OP ROPA O A a 8 The DIGITIZER Alison no no N 9 TMS PSAUTIER E EERE E E E E EE E E OEE EAA EAA 12 A EE S E e r E E E EN E E AE A E 15 3 Basic Measurement5 vs i ssia s v c si sds cad ak k n von ssov inton cia ZB EE COVE SN aroeira tri 23 Enjoying the first SIPM spectrum amp measuring the Dark Count Rate uu sessssssssessessessecsessessessssecsecsecsssseessesesseescescsscssees 23 Can you see the light SIPM illuminating t
6. A typical 1x1 mm SiPM stair case After setting the thresholds for the two channels the coincidence width shall be set in the PSAU discriminator tab Fig 3 17 35 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Fig 3 17 PSAU discriminator tab for setting threshold coincidence width and output level When the coincidence is ON automatically the NIM coincidence signal is on the DOUTO Setting the EXTERNAL trigger mode on the Digitizer tab the spectrum will be obtained triggering the system by this external coincidence signal The digitizer gate parameters shall be set in order to have a gate fitting the signal produced by the tile In internal trigger mode the digitizer requires the setting of the thresholds for the two channels and the setting of the coincidence time Fig 3 18 Fixed M matched Fig 3 18 DIGITIZER tab two channel thresholds are set and the coincidence is ON 2473 SiPM Development Kit QuickStart Guide 36 CAEN Electronic Instrumentation 4 Functional Description SP5600 2 Channels General Purpose Amplifier and Power Supply Unit Variable amplification gain up to 50 dB e Low noise not to spoil the sensor performances for small signals Wideband to comply with the fast sensor response e Fast leading edge discriminator and time coincidence Provides the bias for the sensors with gain stabilization e USB 2 0 interface e Mechanical struct
7. ch 0 o INPUT DC OFFSET it is a percentage shift of the input range AJ at scale 2 Vpp allowing the dynamic range to be shifted from input DC offset ch 1 1 0 2 0 0 V up to 0 2 0 V 50 is its minimum value and it corresponds to 2 0 0 V dynamic range 0 corresponds to a 1 0 1 0 V dynamic range The control is enabled when the correspondent channel is active CHANNEL THRESHOLD it represents the threshold over delta allowing the detection of the pulses in auto trigger mode The threshold ch 1 20 delta is the difference between the current sample i e the input signal sampled at time t and the average of a samples digitized rise time ns before t The control is enabled when the correspondent channel is active threshold ch 0 5 120 trigger mode TRIGGER MODE if internal trigger mode is selected the external nm internal digitizer is able to self detect the signals according to the trigger parameters If external trigger mode is selected the digitizer wait a trigger signal on the LEMO TRG IN connector on the front panel 9 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Trigger mean rise time ns Hao Gate gate ns 3304 3 pre gate ns draa hold off ns N d ee ad U pa s 3304 Baseline mean 16 threshold my io Ji no flat ns Z P coincidence OFF J 0 coince time r
8. e Upper left panel tabs refer to the Digitizer PSAU SP5600 e Bottom left panel tabs address the DT5720 e Right hand side panel visualization of the measurements and data storage The bottom right side of the GUI allows the user to retrieve or save a configuration file with all the set parameters for the digitizer and the PSAU to save the current visualized data on the visualization tabs and the plots in the active tab as image files a l SiPMkit_ControlSoftware_00_19 vi C LA Xx File Edit Operate Tools Window Help i ACTIVE CHANNEL Histogram charge vs time l wave l 2 channel Histograms l PSAU staircase l PSAU counting l Jo CommPort 16 START PSAU ON number of events 15680 errors Bias Gain T monitor l Discriminator l T Compensation l running time s 3 ch 0 monitor ch 0 bias V Gain S OFF bias v temp C dV dT mV C _ fae m Ino fas r monitor ch 1 ch1 bias V Gain dBlcomp OFF bias v temp C dV dT mV C 9 Jz 192 O 31 96 21 7 START DIGITIZER ON J connection amp errors acquisition settings 300 1000 1200 UA charge ADC channels input DC offset ch 0 0 threshold ch 0 130 input DC offset ch 1 0 threshold ch 1 10 trigger mode externa if internal 1718 75 3551 72 D i g i t i z e r Number of Bins gt 2000 Bin size ADC 8 7 rere config file name bmp file name G i 0 coinc time Running ON POT example
9. scintillators photomultipliers or SiPM detectors implementing a digital version of the traditional ODC Charge to Digital Converter The digitizer runs on real time e Self Trigger using CR RC digital Time filter algorithm e Input signal baseline pedestal calculation e Charge Integration with programmable gate parameters with pedestal subtraction for energy calculation SP5601 LED Driver e Width of pulse 1 1 60 ns e LED color violet 400nm 1500 mcd OUT INT IN G S e Pulse generator internal external TRIGGER e Optical output connectors FC O CAEN jem e Optical fiber included SN 034 mension X X mm XFX Di ion 79 x 42 x 102 mm WxHxD The SP5601 is an ultra fast LED Driver with pulse width at ns level tunable intensity and frequency that provides a low cost tool for the detector characterization The LED pulse generation can be triggered by an internal oscillator or by an external pulser SP5602 Scintillating Tile e Sensitive volume 150 x 150 x 10 mm e Scintillator polystyrene e Light guide embedded WLS fiber e Output connectors FC e Dimension 200 x 150 x 10 mm WxHxD The SP5602 is a plastic scintillating tile with a WLS fiber embedded to collect the scintillator light FC terminated The tile with a sensitive volume of 150 x 150 x 10 mm is the ideal tool for tests with beta emitting isotopes and cosmic rays 2473 SIPM Development Kit OuickStart Guide 38
10. the feedback system for the SiPM gain stabilization against temperature variations can be disabled conn errors Bias ain temp monitor Discriminator Temp Compensation settings ch monitor ch 0 bias 1 Gain dB bias V temp 20 dyidT reve Hoz djs come OFF fosi 28 57 settings ch 1 monitor ch 1 chi bias Sain dE bias 1 temp C dyidr rove 3 i 71 JE comp OFF 68 63 20 5 57 ON Fig 3 1 Bias amp Gain tab of the GUI panel As long as the SiPM is biased and the oscilloscope is properly triggered an edge trigger in manual mode with a threshold at the 10 mV level should be suitable the SIPM signal is expected to appear on the oscilloscope display with a waveform similar to what is shown in Fig 3 2 23 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation ac Agilent Technologies MON SEP 27 22 26 13 2010 E E gi A A ida tie i L AX 200 00ns DAN 5 0000MHz AY 1 KAP 45 Mode 45 Source X Y a TI 4 Y2 2 y1 Y2 Manual 1 v 55 625mV 118 750mV Fig 3 2 SiPM output signal for a not illuminated sensor Bias 69 72 V Gain 40 db Peak to peak distance 63 13 mV The different bands in the signal output correspond to avalanches in the cells triggered by the thermal generation of the charge carriers or by the photons associated to the avalanche development optical cross talk The SiPM Geiger Mueller multiplicatio
11. wave of Fig 3 11 2155 threshold ch 0 my 2150 4 A120 1 pa ie A 1 1111 1 1111 1 M 34209426 800 500 250 0 time Fig 3 10 the wave for a wrong PSAU trigger threshold threshold ch 0 my as 11 100 PD EL DITA 4 800 500 250 0 1200 110312756 lst Fig 3 11 the wave for a right PSAU trigger threshold How select the right external threshold value Running a staircase in the PSAU staircase tab from 5mV to 100mV the dark count rate decreases drastically from 2 MHz to a value below 1 kHz Fig 3 12 This example is performed with a Cs source of an activity of 180 kBg so in order to remove all the dark count rate due to the nature of the sensor a threshold of 100 mV can be selected Fig 3 13 2473 SiPM Development Kit QuickStart Guide 32 CAEN Electronic Instrumentation Vest 1E 6 100000 10000 freguency Hz 1000 100 I I l I 10 70 30 40 50 60 70 50 30 100 110 Threshold m min thr v 0 5 points for mean mmm 1 st 20 0 105 1015 max thr m error s 110 gatewidth ms _ gt s 10 4000 2000 step mY I 75 puruniet prurient 1 aj 1 200 400 500 PSAU name File user save staircase orr REFRESH i Fig 3 12 not so much staircase for SiPM 33 50C of spectrometer in a run without source threshold ch O m width ch 0 ns M ioo a S i l l I II
12. 000 10000 8000 SK s d 5 6000 5 10000 4000 2000 D i l 0 l l T 0 500 1000 1500 2000 o 500 1000 1500 2000 charge ADC channels charge ADC channels TAI li 1 Gursors 1X fy 14l amp Daal FE FE amp 3162 86 0 3162 86 0 x axis origin humber of Bins Bin size ADC vk i Histo file name J Fig 2 8 Histos sub tab of 2 channel Histogram main tab 2473 SiPM Development Kit QuickStart Guide 18 19 CAEN Q Electronic Instrumentation The Histo Sum sub tab contains the plot of the histogram sum This histogram results from adding channelO s histogram to channel1 s histogram multiplied by an alpha factor ACTIVE CHANEL Histogram charge vs time wave channel Histograms PSAU staircase PSAU counting u 0 Histos Histo Sum Correlation channel 0 alfa channel 1 E timi 35000 1c o 3 20000 15000 10000 100 200 300 400 500 600 700 800 900 1000 1100 b il ll HI ay Ca alfa Jo RESET HISTO z 3162 86 0 a T HistoSurm file name E Fig 2 9 Histo Sum sub tab of the 2 channel Histograms main tab The parameter alpha is configurable by 0 001 step Histogram reset can be performed by the RESET HISTO button and the plot can be saved by the Save button with a user defined prefix written
13. 22 CAEN Q Electronic Instrumentation 3 Basic Measurements Kit configuration e Required elements PSAU Digitizer Oscilloscope e Cabling instructions o the kit elements shall be connected to the PC via the USB o the output from Channel 0 or 1 of the PSAU shall be directed to the oscilloscope e Getting the system alive o The PSAU and the Digitizer shall be powered on o The GUI launched and the Port assignment specified in the PSAU panel below r commPort i6 START PSAU OFF o The Control system shall be activated for the fun to start If the CommPort is wrongly selected an error message will appear Enjoving the first SIPM spectrum 8 measuring the Dark Count Rate L Note the measurements described in this chapter have been performed by using the SiPM Kit Control Software release 0 6 The tabs here presented can slightly differ from releases gt 0 6 Once the system is running the first action to take is properly biasing the detector and setting the right gain to avoid saturating the PSAU amplifier As far as the optimal sensor bias it is suggested to stick to the value reported on the sensor ID card which may be set in the Bias amp Gain tab of the PSAU panel Figure 3 At the same time the amplification factor can be set and since the SiPM for the current measurement will not be illuminated and only a few cells are expected to fire a high value can be used e g 40 dB Moreover for the sake of clarity
14. GD2473 SIPM Development Kit OuickStart Guide Rev 5 25 March 2014 Purpose of this Guide This QuickStart Guide contains basic information and examples that will let you use SIPM educational Kit in few steps Change Document Record Date Revision Changes May 2011 00000 mitialrelease 1 July 2011 JE re a Symbols abbreviated terms and notation AMC FPGA Acquisition amp Memory Controller FPGA DPP Digital Pulse Processing FPGA Field Programmable Gate Array OS Operating System PSAU Power Supply amp Amplification Unit ROC FPGA ReadOut Controller FGPA SIPM Silicon Photo Multiplier Reference Documents RD1 DT5720 User Manual RD2 UM1935 CAENDigitizer User Reference Manual RD 3 GD 2783 First Installation Guide to Desktop Digitizers amp MCA CAEN S pA 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 2014 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 CAEN Q Electronic Instrumentation Index
15. I l I III l LIE lI a l a 000 500 250 125 Fig 3 13 setting of PSAU threshold for NIM trigger for digitizer in PSAU discriminator tab If digitizer internal trigger mode is selected a threshold value referring to delta signal on the digitizer tab Shall be selected Fig 3 14 shows the wave trace with correspondent delta and the gate ye di K py signal amplitude m 1000 415345089 415547 time Fig 3 14 wave white and delta green Threshold 300 trigger mean 8 rise time 48 As exemplary illustration Fig 3 15 shows a spectrum of Cs obtained with the mini spectrometer with the Hamamatsu 33 50C SIPM coupled with a 3x3x15 mm Csil crystal the set threshold is cutting the system noise peak and the 30KeV y line 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation 100 30 a0 60 50 Counts 40 30 eug 10 i I aaa RONG 150i ca a geo ae 1 I 19565 2 0 50000 100000 150000 ZO0000 250000 300000 350000 379739 ADE channels a K low refresh rate lt ii gt high refresh rate histo origin ADC 10000 Histo file name RESET HISTO Number of Bins 10000 histo file Bin size ADC 7064 Save Histo BB g 137 Fig 3 15 Cs spectrum 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation Can you see a B particle Kit Configuration e Required
16. L for clock synthesis from internal external references The data stream is continuously written in a circular memory buffer When the trigger occurs the FPGA writes further N samples for the post trigger and freezes the buffer that can be read by USB or Optical Link The acquisition can continue without dead time in a new buffer 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Each channel has a SRAM memory buffer 1 25 MS ch divided into buffers of programmable size 1 1024 The readout by USB or Optical Link of a frozen buffer is independent from the write operations in the active circular buffer ADC data storage The trigger signal can be provided externally via the front panel Trigger Input as well as via the software but it can also be generated internally thanks to threshold self trigger capability DT5720A houses USB 2 0 and Optical Link interfaces USB 2 0 allows data transfers up to 30 MB s The Optical Link supports transfer rate of 80 MB s and offer Daisy chain capability Therefore it is possible to connect up to 8 32 ADC modules to a single Optical Link Controller Mod A2818 A 3818 Dt5720 is eguipped with a Digital Pulse Processing firmware for Physics Applications DPP CI Digital Pulse Processing for the Charge Integration This feature allows to perform on line processing on detector signal directly digitized DT5720A is well suited for data acguisition and processing of signals from
17. LIM A E A E E acs sash EANA SIT EA N E EEE A accent 34 Fig 3 16 A typical 1x1 mm SIPM stair CASE s ri rr nav 35 Fig 3 17 PSAU discriminator tab for setting threshold coincidence width and output level esss e sssssscssssssecsesssssccsssss 36 Fig 3 18 DIGITIZER tab two channel thresholds are set and the coincidence is ON ssssssesssssseessssseceesssseecessssccrosssecesssseeee 36 List of Tables Tap Building OCS of tne Kitsas SETENE rn ot 6 Tab 2 1 host PC requirements is las non 7 Tab 2 2 PSAU library return CORES siessen unna a Ei a E EEEE TT 14 2473 SiPM Development Kit QuickStart Guide 4 CAEN Q Electronic Instrumentation 1 System Overview The SiPM Kit is a modular set up based on Silicon Photo Multipliers the state of the art sensors for low light detection with photon number resolving capabilities The full kit called Educational comprises a simplified kit called Evaluation is also available Nr 1 Power Supply amp Amplification Unit PSAU ID code SP5600 The PSAU supplies the bias for the sensors features a variable amplification factor up to 50 dB and integrates a feedback circuit to stabilize the sensor gain against temperature variations Moreover the PSAU includes one leading edge discriminator channel and a coincidence circuit for flexible event trigger logic Sensors housed in dedicated mechanical holders can be directly connected to the PSAU The PSAU technical specifications are rep
18. ation of the multi photon peak spectrum are shown in Fig 3 8 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Histearam charge vstine wave PSAU staircase PSAU counting Histcgram charge vs time wave PSAU staircase PSAU counting Ccurts r oo 0 EE 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4m Ann ANNA 1117 1200 1411 1171 1anrn annn ann N r 17nm 1471 151 charge charge Fig 3 8 Multi photon peak spectrum at two different LED intensities The multi photon peak spectrum provides several information about the system in use it is worth recalling here the fundamentals e The SiPM multiplication factor can be measured by the peak to peak distance knowing that the system is characterized by a charge LSB of 40 fC ADC channel and the SiPM signal is amplified by an amplification factor set by the user The linearity and the dynamic range of the sensor can be studied as well e The photon number resolving power can be obtained at glance and its dependence on the SiPM biasing conditions studied e Agenuine multi photon peak spectrum fit can provide further insight namely o A measurement of the width of the Gaussian peaks against the number n of cells where a trend of the form vWC 0 N Is expected being o related to the zero photon peak width so to the system noise and provides an indication of the cell to cell variation of the characteristics o An independent mea
19. c Agilent Technologies MON SEP 27 22 32 28 2010 vyj A A Pat Measure Counter ZYKH 0 CC 801 71kHz 4 Source 45 Select Measure Settings Clear Meas Statistics 1 Counter Counter a ai 2 Fig 3 3 DCR 0 5 measurement at the oscilloscope The frequency drops to 206 KHz increasing the threshold to 1 5 p e not shown By now and before moving to the next step the user can gain further knowledge on the system playing with the bias and the amplification factor and measuring the peak to peak and DCR variations 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation Can you see the light SiPM illuminating triggering 8 integrating Kit Configuration e Required elements PSAU Digitizer LED driver Oscilloscope e Cabling instructions o the kit elements shall be connected to the PC via the USB o the LED output shall be directed to the SIPM through the FC terminated clear fiber o cabling among the kit elements depend on the undertaken measurement see below e Getting the system alive o Power on the kit elements o Start the system control and RUN the application o Verify the connection amp error tabs for both the Digitizer and the PSAU o Bias the SiPM and set an initial amplification factor as of 0 o Initially no setting of the Digitizer and visualization panels are required Obtaining a multi photon peak spectrum The multi photon peak spectrum fully exploits the SiPM pot
20. elements PSAU Digitizer Tile Oscilloscope e Cabling instructions o The PSAU and the Digitizer shall be connected to the PC via the USB o The two SiPM heads shall be connected to the PSAU in CHO and CH1 position o The CHO and CH1 out from the PSAU shall be connected to the two input on the front panel of the digitizer o The DOUTO from the PSAU shall be connected to the TRG IN on the front panel of the digitizer e Getting the system alive o Power on the kit elements o Start the system control RUN the application and start the PSAU and the Digitizer o Activate all the PSAU channels and all the Digitizer channels o 0 Bias the two SIPM and set an amplification factor as of 0 Setting the threshold and the coincidence When the system is up and running the coincidence can be performed with the PSAU or internally the digitizer If the PSAU is used to trigger the digitizer the two channel thresholds and the coincidence width have to be set in the PSAU discriminator tab The right choice of the two thresholds can be performed looking at the PSAU staircase run one for each channel as of 2 5 3 for example a threshold reducing the dark count rate of the SIPM to a level around 1 10 kHz can be set Figure 18 shows a SIPM stair case setting a threshold of 100 110 mV the DCR is reduced of a factor 2 1E 6 100000 Frequency Hz 10000 l l l I I 0 20 40 60 5 0 100 120 140 Threshold m4 Fig 3 16
21. els The compensation acts on the bias of the sensor to keep its gain constant according to a linear VT dependence The Errors tab contains the PSAU firmware release and the error code of the library which the PSAU stands on and reported in Tab 2 2 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Error code Value Meaning PSAU_Success 00 Operation completed successfully PSAU_InvalidComPortError atb Error related to the COM port PSAU TooManycClientsError 2 Max nr of PSAUs simultaneously manageable exceeded PSAU_CommunicationError PSAU InvalidCommandError 6 Invalid command error PSAU DeviceNotfound 8 Device error e g hardware or firmware issue Tab 2 2 PSAU library return codes 2473 SIPM Development Kit OuickStart Guide 14 CAEN Q Electronic Instrumentation The visualization tabs 15 The visualization tabs allow the user to manage and visualize the signals of the SiPMs The Histogram charge vs time wave and 2 channel Histograms tabs refer to the digitizer The other two PSAU Staircase and PSAU counting refer to the PSAU The Histogram tab shows the histogram of the active channel according to the PSAU and digitizer settings The user can change the refresh rate in the meaning of the access to the buffer of the digitizer high refresh rate means high access rate to the digitizer and low number of i
22. ential and it is the reference quantity for the detector characterisation and qualification It corresponds to the output signal spectrum for an illuminated SIPM and carries information about the detector gain and noise the photon number resolving capability and even the DCR and the cross talk concerning the light source it allows to characterize the statistics of the emitted photons More will be reported in the following after the first soectrum is obtained through a two step procedure e Step 1 amplification factor and intensity tuning LED driver PSAU Oscilloscope The LED driver features the possibility to generate internally or externally the light pulse frequency for the sake of simplicity internal generation is considered here and the toggle switch on the back plane of the LED driver shall be set accordingly The pulse frequency can be selected via a multi turn rotary meter in the 6 500 kHz range When internal generation is chosen a synchronization output signal in NIM logic is provided from the DOUT plug on the back panel In order to know the frequency and as a trigger for the SIPM output visualization it is recommended to look at the synch signal at the oscilloscope Once this is done the SiPM output from the PSAU can be properly displayed showing a number of fired cells by far exceeding what is due to the DCR and cross talk Looking at the scope track the LED intensity can be tuned and the amplification factor regulated
23. er For Windows XP you can do it going to Control Panel gt System gt Hardware tab gt Device Manager as shown in Fig 2 1 Device Manager File Action View Help msema M Batteries 4 Computer Se Disk drives W Display adapters 4 DYD CD ROM drives a Human Interface Devices IDE ATAJATAPI controllers gt Keyboards Mice and other pointing devices Monitors 9 Network adapters Other devices PCMCIA adapters S Ports COM amp LPT a Smart card readers Sound video and game controllers 4 System devices Hardware Profiles a Hardware profiles provide a way for you to set up and store zl different hardware configurations Hardware Profiles OK Cancel Fig 2 1 Tracking the PSAU port assignment on a PC running Windows XP 7 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation e Unzip the SIPM kit Control Software it doesn t require an installation a double click on the exe file will make it work L Important Note Releases of the SIPM Kit Control Software gt 0 6 build20120520 strictly need a digitizer USB Driver release gt 3 4 7 if running in a 32 bit Windows environment GUI main panel The GUI main panel is structured as a virtual instrument its appearance and operations imitate a real central system Fig 2 2 Three sub panels may be identified
24. espondes to the synchronization signal form the LED river ccessessessessesscsscsscsscsscsecsesssescsacsscsecsucsecsscsecsecaseaeeacenceucsscsseess 27 Fig 3 5 Analog out from SIPM under test showing onset of saturation due to a too large amplification factor 27 FIG 3 0 Ne DIGITIZER control panel saune rovno or r orn 28 nic s Th WAVE display of the EU isto rar a 29 Fig 3 8 Multi photon peak spectrum at two different LED Intensities 0 sessssessessessesessesessssesscsessesscsessesseesssecsesssseeseenees 30 Fig 3 9 Scope trace Of the spectrometer with a Cs SOU Ce a sacecccisccaccovedsscassassnsactsvsusevsnvaccusdessnsstsanssscusb caustdstesceticosscedsiertatuvnsadertats 31 Fig 3 10 the wave for a wrong PSAU trigger threshold essessssesssssssessessessssessesessessssecsessssessessessssessesscsecsessssecseescsucsesecsecaeeseseeseess 32 Fig 3 11 the wave for a right PSAU trigger threshold oc essesssssessssssssssscssssscsessessssssssssucsecsecsscscsessesassacsucsucsucsesssssecsecaeeacencencsscssess 32 Fig 3 12 not so much staircase for SIPM 33 50C of spectrometer in a run without sour ce iinsiassarnornncannnnvnnennm 33 Fig 3 13 setting of PSAU threshold for NIM trigger for digitizer in PSAU discriminator tab isnsnssssnrnrsnronoononnononm 33 Fig 3 14 wave white and delta green Threshold 300 trigger Mean 8 rise time 48 i nssesnssnrnncnncnoonnnonnenonm 33 je Bg 5 SS
25. he Position control The switch on the bottom left side of the tab changes the plotting mode from a continuous stream of data to single shot In single shot mode the update of the plot stops and the user has to push SHOT button for visualize another triggered signal ACTIVE CHANNEL Histogram charge vstime Wave 2 channel Histograms PSAU staircase PSAU counting u 0 2100 signal amplitude mV z 1800 1750 2743051 274331 HAR record lenght Position Scale rj 2200 ri 1 NI BAseLNE JOVERTHR 12190 HOLDOFF 2190 FLAT 2190 Fig 2 7 Wave tab 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation The 2 channel Histograms tab allows for managing the histogram plots from the two channels of the digitizer simultaneously In the three sub tabs it is possible to plot reset and save the two histograms the histogram sum and the correlation The Histos sub tab contains two histogram plots where it is possible to set the x axis origin the number of bins and the bin size in a dedicated menu common to both the channels the reset histograms button and the saving menu output file prefix common to both the files and the SAVE button to perform the saving ACTIVE CHANNEL Histogram charge vs time wave channel Histograms PSAU staircase PSAU counting i Histos Histo Sum Correlation channel 0 channel 1 12
26. if all of them exceed their own threshold during this time width 10 11 Connection amp errors sub tab D i s g i t i Z e r Fig 2 4 Connection 8 errors sub tab CAEN Electronic Instrumentation CONNECTION HANDLE once the device is opened the function returns a handle that becomes the unique identifier of that device any access operation to the device will take place according to its handle thus making transparent the physical channel ROC amp AMC FIRMWARE RELEASE these fields contain the current firmware release running on the mainboard i e on the ROC FPGA and on the mezzanine i e on the AMC PFGA ERROR OUT any error given back by the CAENDigitizer library which the program stands on is reported in the field code Please refer to RD2 for the return codes table 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation The PSAU tabs The PSAU tabs allow the user to set and monitor all the PSAU parameters They become active after the communication with the PSAU is started through the START PSAU button This button opens the communication with the PSAU by the selected COMM Port Important Note if you wish to set and monitor all the PSAU parameters in Standalone mode you shall use L the PSAU Control Software unzip the PSAU Control Software it doesn t require an installation a double click on the exe file will make it work only the PSAU tab
27. in the HistoSum file name field 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation The Correlation sub tab shows a scatter plot of the signals from the 2 sensors after being integrated in the specified time window It may be of help for specific applications relying on a simultaneous use of the 2 detectors e g when using the scintillator tile for cosmic ray experiments or 2 spectrometry heads for 22Na positron annihilation detection ACTIVE CHANNEL Histogram charge vs time wave 2 channel Histograms PSAU staircase PSAU counting j 0 Histos Histo Sum Correlation channel vs channel 1 Ploto M l I l l I l 200 400 600 00 1000 1200 1400 1600 1800 2000 channel 0 Fig 2 10 Correlation sub tab of the 2 channel Histograms main tab 2473 SiPM Development Kit QuickStart Guide 20 21 CAEN Q Electronic Instrumentation The PSAU staircase tab allows the interaction with the PSAU in order to produce the so called SiPM staircase the plot shows the frequency of the signals which are over the threshold during a scan from the min thr value up to max thr value The user can change these limits the step the number of read point which produce the mean plotted value and the gate width for the counting ACTIVE CHANNEL Histogram charge ws time wave 2 channel Histograms P gt AU staircase PSAU counting o l l l l 10 20 30
28. ing started This chapter will guide you through the installation of the Graphical Users Interface GUI and the first measurements based on the use of the PSAU Software Installation Minimum system requirements OS Hardware CAEN drivers reguired Third party software reguired Windows 2 available v aa LabView Run Time Engine 2009 SP1 i 2 bi RTE ilable f f XP Vista 7 USB2 0 SP5600 USB driver 32 64 32 bit Standard available free o 32 64 bit ports bit charge at the NI website Tab 2 1 host PC requirements e You need to download the USB drivers for both DT5720 and SP5600 compliant to your Windows version 32 or 64 bit and the LabView based Control Software a single package compliant to 32 and 64 bit Windows OSs To do this go to the SP5600A KIT webpage and click on the Software Firmware section e Install the DT5720 drivers following the instruction of the setup wizard When you connect DT5720 to your PC the OS will recognize it automatically If the automatic installation fails perform it manually from the Device Manager by selecting the driver update and pointing to the driver folder you downloaded from CAEN website Refer to RD3 for detailed installation OS dependent e Connect SP5600 to your PC it will recognize as a new peripheral by the OS e Please select as driver the one you downloaded from CAEN website e Finally a COMM port will be associated to SP5600 please check the port numb
29. lity to anticipate it to compensate for the different timing in the signal routing e The hold off time a user s defined veto following a GATE opening The hold off can also be shown in the WAVE display For the sake of clarity in the display every signal can be OFFESET and MAGNIFIED enabled or disabled Fig 3 7 is showing the WAVE panel for the SiPM illuminated by the LED for optimal tuning of the baseline and notably of the pre gate and the gate width depending on the time development of the SiPM signal It is worth remarking here that the LED driver was designed to provide light pulses with a few ns duration see the technical specifications so the time development is dominated by the sensor response Histogram charge vs time wave PSAU staircase PSAU counting ACTIVE CHANNEL J lo 21255 2100 signa amplitude m 2000 i 1153070 11532 time zoom out lt gt zoomin digital signals analog signals Position Scale 2 9 A Position Scale GATE j 12200 J 20 99a JA MI v JOVERTHR 2190 20 A HoLDOFF 2190 20 SINGLE JJ gt SHOT rat 2130 5120 A config file name bmp file name RETRIEVE SAVE Fig 3 7 The WAVE display of the GUI Running Q ON STOP PROGRAM plot file name PRINT DISPLAY As long as the GATE is properly defined the system is ready to record the spectrum displaved in the HISTOGRAM tab Exemplary illustr
30. lopment Kit QuickStart Guide CAEN Electronic Instrumentation The charge vs time tab plots the charge versus time The user can zoom in and zoom out the plot and change the number of charges for the plotted mean ACTIVE CHANNEL Histogram chargevstime wave 2 channel Histograms PSAU staircase PSAU counting jo s i A hi lal MUNIT 7 Ate aak charge ADC channels l T447 8024 zoom out m oF zoom in points for mean NM 2 1 10 20 30 40 50 Chargevs Time file name Save_Chargevs Time m Fig 2 6 charge vs time tab 2473 SiPM Development Kit QuickStart Guide 16 CAEN Electronic Instrumentation The wave tab shows the trace of the analog and digital signals read from the digitizer The analog signals are the trace of the input and the virtual probe which in internal trigger mode can be the delta or the baseline signal If external trigger mode is selected the virtual probe automatically switches on baseline only The digital signals are the Gate red the Time Over Threshold yellow the Holdoff time blu the Flat signal i e the signal that visualize the baseline calculation violet e the gate flat and over threshold signals represent the digitizer selected parameters e the over threshold is generated when the signal is over the set threshold All the trace can be amplified with the Scale control and moved in vertical position with t
31. n factor is actually corresponding to the area underneath the single cell signal However the peak to peak distance provides a fair indication of the overall system gain useful for e checking the SIPM gain dependence on the over voltage with respect to the breakdown e set the amplification factor and avoid saturation effects e set the discriminator threshold to generate a trigger condition and integrate the signal or perform counting experiments A useful entry level parameter is the Dark Count Rate DCR of the SiPM under study namely the frequency with which avalanches occur for thermal or optical cross talk OXT effects It is a standard procedure to quantify the DCR as the counting frequency with a threshold corresponding to 0 5 x single photo electron p e peak DCRO 5 and to measure the OXT as ox 2s DCR s Being the numerator the Dark Count Rate with a threshold at 1 5 photoelectron peak The DCR vs threshold can be precisely measured with the Kit However a fair indication can be obtained with the Oscilloscope if the option to measure the triggering frequency is offered In case it is worth to exploit this feature to cross check the values against the factory measurements and as reference value for the most advanced procedures As exemplary illustration the DCR measurement at 0 5 Photoelectron threshold is shown in Fig 3 3 2473 SiPM Development Kit QuickStart Guide 24 25 CAEN Q Electronic Instrumentation a
32. ntegral signals transferred low refresh rate means low access rate to the digitizer but a big amount of data transferred for each access The properties of the X scale of the histogram can be selected by the user the origin of the histogram in the meaning of the minimum plotted charge value the number of bins which determine the end of the plotting window and the bin size These values determine the range of the histogram that will be stored pushing the SAVE button The prefix of the histogram output file saved can be written by the user in the Histo file name field ACTIVE CHANNEL Histogram charge vs time wave 2 channel Histograms PSAU staircase PSAU counting k 0 number of events 153720 Time z events running time s 65 ee 2 30 oh y 50000 Pict a 0 l i l J 5 l 0 200 400 600 BOO 1000 1200 1400 1600 1800 2000 charge ADC channels HE w S nT high refresh rate Cursors X Y a 1718 75 3551 72 x axis Origin 1 1000 umber of Bins s 3000 Bin size ADC ll 8 S Histo file name The graph palette of the histogram allows the user to change the visualization of the spectrum i e enlarging the histogram zooming it etc 2473 SiPM Deve
33. ode SP5603 engineered as special holder to be directly mounted on the PSAU Two different heads are provided housing a series of crystals including a Csl one bound to be interfaced to a sensor matrix The spectrometer heads were designed to make easy a full range of basic gamma spectrometry educational experiments The main features of the spectrometer heads in will be reported in the coming soon data sheet External AC DC stabilized 12V power supplies Meanwell GS40A12 P1J 40W 12V DC Output 3 34A USB cables Optical Fibres and Power cords A LabView based Graphical Users Interface The different building blocks of the kit can be assembled in a customized configuration according to the specific application and the user s requirements The scope of this guide is to provide a hands on primer on the use of the essential functionalities of the kit 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation Education Evaluation Item description al kit kit SP5600 2 Channels General Purpose Amplifier WSP5600XAAAA yes yes and Power Supply DT5720A 2 Ch 12 bit 250 WDTS720AXAAA res Ves MS s SP5601 Led Driver WSP5601XAAAA yes Yes SP5602 Scintillating Tile WSP5602XAAAA yes No SP5603 Mini Spectrometer WSP5603XAAAA yes no Tab 1 1 Building blocks of the kit 2473 SiPM Development Kit QuickStart Guide 6 CAEN Electronic Instrumentation 2 Gett
34. on GPO z Co 2473 SiPM Development Kit QuickStart Guide TRIGGER PARAMETERS Before the calculation of the delta the input signal is filtered in order to reduce the high frequency noise using a low pass filter that averages a certain number of samples within a moving window mean represents the number of double sampling periods used by the average window allowed values for the parameter are 1 2 4 8 16 and 32 RISE TIME is the rise time of the input signal used in the calculation of the signal delta GATE PARAMETERS gate represents e The width of the gate signals if FIXED GATE MODE is selected e The width of the gate between the input signal under threshold crossing and the end of the gate if MATCHED GATE MODE is selected ore gate is the advance between the gate generation and the trigger leading edge hold off is a veto for the generation of other gates BASELINE PARAMETERS the threshold represents the value on delta over that the baseline calculation is frozen The mean parameter is the number of samples for the average calculation of the baseline 0 disables the baseline restoration no flat is the veto for the calculation of baseline COINCIDENCE PARAMETERS the coincidence can be selected if both the channels are switched on Coincidence time represents the width of the discriminator signal of each channel Two signals are in coincidence
35. orted in the relevant data sheet together with the front and rear panel description SiPM Holders each one housing an Hamamatsu MPPC 1x1 mm2 model S10362 11 100C The mechanical structure of the holders allows an easy coupling of the holders themselves with the PSAU Nr 1 Desktop Waveform digitizer ID code DT5720A with 2 input channels sampled at 250 MS s by a 12 bit ADC The DT5720A runs the Digital Pulse Processing for enhanced triggering and integration capabilities The Digitizer technical specifications are reported in the relevant User s manual together with the front and rear panel description Nr 1 ultra fast LED Driver ID code SP5601 with pulse width at ns level tunable intensity pulsing frequency internally externally generated and FC interface to either a clear or a Wave Length Shifting WLS fiber The LED unit was designed to provide a low cost tool for the SiPM characterization and its technical specifications are reported in the relevant data sheet together with the front and rear panel description Nr 1 plastic scintillating tile ID code SP5602 Scintillation light is collected by a WLS fibre FC terminated at its tips and ready to mount on the PSAU The tile with a sensitive volume of 100 x 100 x 10 mm3 provides an easy to use access to beta emitting isotope and cosmic ray detection Its technical specifications will be reported in the coming soon data sheet Nr 1 mini spectrometer for gamma ray detection ID c
36. riggering amp integrating uu eessesesessessesssecsscsssscsscsssscsessssscsessssassucsessssscaeeseess 26 KEC OPICU JE osn TN EN a 26 Obtaining a multi photon peak spectrum uu eccecsssessssecsssesscsessesecseseescsessesessesesscsesacsecseseeseseesesessesesscaesscseeseseeseseescaeeseaceseaeess 26 RAIN VOU GO SC CEN senienas NRK ON KO leeis 31 NILE OJNICE O n Er 31 Correctly bias the SIPM and set the Gain uu cessesssssssssssssssscssssssscsessssecsesssscsssassassscsessssucsesssscsesscsucsecaesssscaesscscaesacsecseeseens 31 External and internal trigger sssvsssnvctsscessucecescasecusussdaanivensiaserstasovesastesncass snisassvessvossutnsutusttovensslaativessiecnstusveadsotienrarsiieansteavstealeiesess 32 Carol L PICE his NE o N OEEO 35 ASH ep Ber 35 Setting the threshold and the coincidence iieisssesnsonsnonsnnononts ono ono eno nonsens 35 A Functional DESCIIBtIONYssii scostsivaoso is dvos s s au S sa vdova v s ave konta s vino ao osti ia in 3 Z SP5600 2 Channels General Purpose Amplifier and Power Supply Uni isstnstssnnosnnntcsnnnosnnu snnno nas osn nanes 37 DT5720A 2 Channel 12 bit 250 MS s DIGIT ZE liosures stas nosn oska ono 37 51560 Bl cS l eens ner E O i sere ener teeter 38 513002 SCIEN Ve E a E S E S No ih 38 DF SOO Sl SSC UPON S CEN sisal na a 39 List of Figures Fig 2 1 Tracking the PSAU port assignment ON a PC running Windows XP uuu essssessssessssecscsesscsscsesecse
37. s of SiPM kit Control Software will be displayed The Bias Gain tab provides the switchers for the two channels enabling the settings of the bias the gain and the temperature compensation The Bias Gain tab CommPort 6 START PSAU ON fy provides the switchers i l for the two channels errors Bias Gain T monitor Discriminator T Compensation enabling the settings of the bias the gain and settings ch 0 monitor ch 0 the temperature m bias V Gain dElcomp OFF bias V temp C dV dT mV C compensation 9 jn 92 0 70 94 21 5 57 ON monitor ch 1 bias V temp C dV dT mV C 3106 221 7 The T monitor tab CommPort v 6 START PSAL ON J shows the temperature of the errors Bias Gain monitor Discriminator T Compensation two SiPM and the temperature of the Channel 0 Jj i board Channel1 RJ 1 Temperature C I I 10789 11812 2473 SiPM Development Kit QuickStart Guide 12 CAEN Q Electronic Instrumentation The Discriminator tab allows the settings of the threshold of the discriminators and the width of the signal produced as output The output level can be set as NIM or TTL The coincidence is active if the two PSAU channels are switched on The coincidence signal is provided on the digital output 0 DOUT 0 The T compensation allows the setting of the coefficient dV dT for both the chann
38. secscseescsesscsesscsteacsecseseeecseeees 7 PeP CL Fel IAL TING lisia tot r v 8 FIO 2 3 Acquisition settings SUD tab sascscecccss vez a o ori oa 9 FIG 241 CONNECTION gemors SUID Tab aseene ooo ro rov 11 plc 25 MSEC AMIN LAD s ro ton 15 Flo 2 0 CUS WS EMIS Mal a A E ENE r ri 16 FIO 2 agers noo o o on 17 Fig 2 8 Histos sub tab of 2 channel Histogram main tab sssssssessessecsessessesssssesscsecsecsessessessssasescsscsecsecseeseeaeeaseseeseessescssees 18 Fig 2 9 Histo Sum sub tab of the 2 channel Histograms main tab csessesssssssssecssssesssssecsecsessssscscsecsessscsecseeseensesssnceessess 19 Fig 2 10 Correlation sub tab of the 2 channel Histograms main tab uu eessessessesessssessescstcsscseeseesesscsscscsscscsecseeseesseseseees 20 Fe ee ll IS eS Tp O E nn 21 FIGs 2 12 PSAU Counting TA ss o r o vo one 22 FIGs sl Blas Gain tap th U CARE N on 23 Fig 3 2 SIPM output signal for a not illuminated sensor Bias 69 72 V Gain 40 db Peak to peak distance 63 13 mV a ce eee ees ete cnc neces Gece ec ects cca ceca ccc saeco ce ce acest eee 24 Fig 3 3 DCR 0 5 measurement at the oscilloscope The frequency drops to 206 KHz increasing the threshold to 1 5 FS VE SN rta ena DO NT oi 25 3 2473 SiPM Development Kit QuickStart Guide CAEN Electronic Instrumentation Fig 3 4 Analog output from the SiPM under test illuminated the LED The purple track used as a trigger corr
39. surement of the DCR and the cross talk as long as these terms are included in the fitting function o An information on the statistics of the emitted photons usually retained to be Poissonian e Moreover the SIPM biasing can be optimized trading off the avalanche triggering efficiency and the spectrum quality possibly affected by the spurious dark counts in the GATE window 2473 SiPM Development Kit QuickStart Guide 30 CAEN Electronic Instrumentation Can you see y spectrum Kit Configuration e Required elements PSAU Digitizer Spectrometer Oscilloscope e Cabling instructions o The PSAU and the Digitizer shall be connected to the PC via the USB o The Spectrometer shall be connected to the PSAU in CHO or CH1 position o The correspondent CH out from the PSAU shall be connected to an input on the front panel of the digitizer o The correspondent DOUT from the PSAU shall be connected to the TRG IN on the front panel of the Digitizer e Getting the system alive o Power on the kit elements o Start the system control RUN the application and start the PSAU and the Digitizer o Activate the connected PSAU channel and Digitizer channel Correctly bias the SiPM and set the gain The first action to take is biasing the SIPM and setting the right gain set the bias according to the detector datasheet in this example bias 71 27V For the gain since the SiPM in the spectrometer application will be illuminated and a lo
40. to avoid saturating the dynamic range and inducing an artefact in the spectrum Fig 3 4 and Fig 3 5 2473 SiPM Development Kit QuickStart Guide 26 27 CAEN Q Electronic Instrumentation ac Agilent Technologies TUE SEP 28 16 11 16 2010 Save Recall Menu save Recall Default Press to Quick Print a a i Setup Save m Fig 3 4 Analog output from the SIPM under test illuminated the LED The purple track used as a trigger correspondes to the synchronization signal form the LED driver oc Agilent Technologies TUE SEP 28 16 12 36 2010 Save Recall Default Quick Print 2 2 Setup Save m Fig 3 5 Analog out from SIPM under test showing onset of saturation due to a too large amplification factor 2473 SIPM Development Kit OuickStart Guide CAEN Electronic Instrumentation e Step 2 signal digitization In order to digitize the SIPM output the kit has to be configured as follows o Cabling The output signal form the PSAU has to be connected to the input of the Digitizer either channel O or 1 o The Synchronization signal from the LED will provide the trigger edge to the Digitizer and it has to be connected to the TRGIN plug o Software in the Digitizer panel Fig 3 6 Select EXTERNAL trigger mode Select FIXED gate mode Select the active channel 0 or 1 Accept default values for the GATE and BASELINE sub panels Coincidence Fig 3 6 The DIGITIZER control panel
41. tral e 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 Fax 39 0584 388 959 Mob 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 Q Electronic Instrumentation Tools for Discovery Guide GD2473 SiPM Development Kit QuickStart Guide rev 5 25 March 2014 00126 9 SIPMO GXXX Copyright CAEN SpA All rights reserved Information in this publication supersedes all earlier versions Specifications subject to change without notice 2473 SiPM Development Kit QuickStart Guide 40
42. ts of cells are expected to fire a low value can be used e g 27 dB settings ch 0 monitor ch chnl bias Gain dB bias V temp PC dvidr mye 9 DE E comp cFF fais Jas 57 on In this example selecting a PSAU discriminating threshold of 10 mV in the PSAU discriminating tab a counting frequency around the DCR 0 5 ph is obtained in this way a Vpp 20 mV is chosen In Fig 3 9 a typical trace of the spectrometer at the scope ate Agilent Technologies a X2 250 00ns 137 Fig 3 9 Scope trace of the spectrometer with a Cs source 31 2473 SiPM Development Kit QuickStart Guide CAEN Q Electronic Instrumentation External and internal trigger The SiPM development kit allows the user to trigger the digitizer for the acquisition of a source spectrum in two different ways internally to the digitizer selecting an appropriate threshold value on delta signal or externally to the digitizer setting the discriminator threshold in the PSAU through the PSAU discriminator tab and using the correspondent NIM signal produced by the PSAU as a trigger signal for the digitizer itself If the digitizer external trigger mode is selected a threshold value on the PSAU discriminator tab shall be selected A wrong choice of this value produce a wave similar to that in Fig 3 10 the PSAU is triggering the signal on its noise Increasing the threshold value the particle signal shall be clear becoming similar to the
43. ure with an embedded SiPM 1 x 1mm2 e Dimension 150 x 50 x 70 mm3 WxHxD The SP5600 is a General purpose Power Supply and Amplification Unit integrating up to two SiPMs in a mother amp daughter architecture allowing easy mounting and replacement of the sensors The basic configuration features two channels with indipendent gain control up to 50 dB and provides the bias voltage up to 120 V to the sensors with gain stabilization Each channel can provide a digital output generated by the fast leading edge discriminators A timing coincidence of the two channels is also available DT5720A 2 Channel 12 bit 250 MS s Digitizer 37 e 2 Channel 12 bit 250 MS s Digitizer Digital Pulse Processing for Charge Integration DPP CI Best suited for PMT and SIPM MPPC readout at low and high rates e Mid High speed signals Typ output of PMT SiIPM e Good timing resolution with fast signals rise time lt 100 ns e Optical Link and USB 2 0 interfaces e Dimension 154 x 50 x 164 mm WxHxD The DT5720A is a 2 Channel 12 bit 250 MS s Desktop Waveform Digitizer with 2 Vpp single ended input dynamics on MCX coaxial connectors The DC offset adjustment range 1 V by programmable 16bit DACs one for each channel allows a right sampling of a bipolar Vin 1 V up to a full positive Vin 0 2 V or negative Vin 0 2 V analog input swing without losing dynamic resolution The module features a front panel Clock Input and a PL
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