1 / 25

Mikhail asiatici 03 /07/2014

Development of a SiPM readout circuit and a trigger system for microfluidic scintillation detectors. Mikhail asiatici 03 /07/2014. Overview. Project context (short overview) So far LabVIEW interface for oscilloscope and XY table PMT measurements Amplifiers simulation and PCB design

cecilia-gould
Download Presentation

Mikhail asiatici 03 /07/2014

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Development of a SiPM readout circuit and a trigger system for microfluidic scintillation detectors Mikhail asiatici 03/07/2014

  2. Overview • Project context (short overview) • So far • LabVIEW interface for oscilloscope and XY table • PMT measurements • Amplifiers simulation and PCB design • PCB manufacturing • In progress • PCB test • Next steps • SiPM measurements

  3. Project context - Target system • Microfluidicscintillator detector • Multiple photodetectors to allowreconstructionof particletracks with high resolution (60 μm channelpitch) • Verylow light level (1.65 photoelectrons per MIP, in average) A. Mapelli et al. - Scintillation particledetectionbased on microfluidics 1/13

  4. project context – sipm vs pmt PMT SiPM A. Mapelli et al. - Scintillation particledetectionbased on microfluidics N. Otte - Silicon Photomultipliers a new device for frontier detectors in HEP, astroparticle physics, nuclear medical and industrial applications 2/13

  5. Project context – Trigger system Sensor photosensitive area Photodetectors Scintillatingfibers 3/13

  6. Project context – xy table Stepper motorscontroller 2 x motorizedlinear stages in XY configuration 4/13

  7. System overview XY table SiPM A SiPM B PicoScope 6403C PC C LabVIEW Under test USB D PMT ext Trigger(s)/signal(s) 5/13

  8. Labview interface: overview 6/13

  9. Labview interface: features (1) • Eachchannelcanbeindependently • Set as signal source, trigger, temperature or disabled • Connected to any pulse source (PMT, SiPM, …) • Trigger modes • Self trigger (on any signal channel) • Single external trigger • A functiongeneratorcanemulate a periodic/random trigger • Coincidence trigger with programmable coincidencewindow • Online pulse integralcalculation and histogramgeneration • Several post-processing options available 7/13

  10. Labview interface: features (2) • Waveformscircularbuffer • Online monitoring of the capture • Temperature acquisition • Temperaturesensorwith voltage output • XY table interfacement • Automatic scan of an array of points • Simplifieddefinition of matrices of points • Import/export from/to XML file • Manual control of the XY table 8/13

  11. Labview interface: features (3) • File logging • Events in ROOT format • Settings and scan points in XML format • Automaticallycreatedtogetherwith the ROOT file • Can beread back in LabVIEW to loadscan points and/or capture settings • Performances • Successful capture of up to 37 000 000 events • Event rate up to 6 kHz 9/13

  12. Labview interface: pmt acquisitions • Tests performedso far: • Scintillatingtile and coincidence trigger (no NIM modulerequired) • Thickliquidscintillator (Davy) • Higherevent rates (up to 1 kHz insteadof 10 Hz) • Highernumber of events in single acquisition (up to 37million) • Variable integration time • 50 ns, single pulse • 10 us, multiple pulses (UV LED excitation) 10/13

  13. Pcb: overview Low voltage power supply (4.75 V – 6 V) Optionally -5 V SiPM (SMD package) PicoScope MCX SMD connector LV LV Step-up switchingconverter Amplifiers Coaxcable HV LEMO connector 11/13

  14. PCB: current situation • PCB delivered on July 2 • Power supply: working • 69.8 V to 75.0 V from 5 V source (USB) 12/13

  15. Next steps • PCB testing • Amplifiers (microScint and INFN) • SiPMmeasures • Darkness • Microchannels • … 13/13

  16. Thankyoufor yourattention

  17. backup

  18. Amplifiers simulations • For SiPM: equivalent model by F. Corsi et al.1 • Parametersfrom one of the devicespresented in the paper (SiPM IRST), with Q = e*M ≈ 200 fC (M ≈ 1.25 x 106 for the devicesreceived) • Amplifier 1: transconductance amplifier + voltage amplifier (single stage from C. Piemonte et al.)2withwide-band voltage-feedback op amp (ADA4817) ≈ 10 mV/pe single stage ≈ 100 mV/pe double stage (but slower) Tsettle5% ≈ 50 – 150 ns (trade gain for speed) Verylow noise (EIN = 4.4 nV/sqrt(Hz)) 1 F. Corsi et al. – Modelling a silicon photomultiplier (SiPM) as a signal source for optimum front-end design 2 C. Piemonte et al. – Development of an automatic procedure for the characterization of silicon photomultipliers 11/20

  19. Amplifiers simulations • Amplifier 2: transconductance amplifier + non-inverting amplifier withwide band current-feedback op amp (AD8000) from F. Giordano et al. ≈ 10 mV/pe single stage ≈ 80 mV/pe double stage Tsettle5% ≈ 40 – 60 ns (fast) Higher noise (EIN = 520 nV/sqrt(Hz)) F. Giordano et al. – Tests on FBK SiPM sensor for a CTA-INFN ProgettoPREMIALE demonstrator (presentation) 12/20

  20. Amplifiers performances summary • Gain in the order of 10s mV/pe, time constants in the order of 10s-100s ns • Amplifier 1 lessnoisy • Amplifier 2 faster 13/20

  21. Amplifiers pcb requirements • The PCB ismeant as a test boardfromwhichpossiblyderive a definitive configuration, soitis important to ensure the maximum possible flexibility • For both the configurations, the signal canbeextractedafter single or double stage • For all of the 4 signal sources, the output canbeexctractedbefore/after a decouplingcapacitor • Capacitorperforms on-board AC coupling, but mightresults in signal reflections • Optional dual supply +/- 5 V as an additionalway to produce a signal with no DC component (but maybedecouplingcapacitorisenough) • All the feedback resistors are potentiometers, to allow gain tuning • There isalways a certain degree of gain-bandwidthtradeoff • Avoid saturation for eventswith a highernumber of photoelectrons • Bypassable on-boardlinear voltage regulator • Compare noise with on-board/external voltage regulation 14/20

  22. SMD SiPM adapter board (dimensions in mm) Connector Holes for mechanical support SiPM (Hamamatsu S12571-050P) 15/20

  23. Amplifiers board Jumpers for on-board/external voltage regulationchoice SiPMconnectors: LEMO Output connectors: LEMO Jumpers for single/dual voltage supplychoice Power supply (HV, LV, optional -5 V, GND) 16/20

  24. Power supply board • Step-up switching voltage regulator, to avoid the need of an high-voltage supplyjust for SiPMbiasing • Output voltage tuning • Integrated DAC with serial interface • Digital pins available for a possible future integrationwithe.g. a microcontroller • Potentiometer (here not shown) • Input voltage range: 4.75 V – 6 V • Output voltage range: 64 V – 69 V @ 2 mA • Vop of the availableSiPM: 66.6 V ± 1.3 V • Recommended Vop range: 2.1 V • Bypassableadditional LC filter at the output to reduceripple (not shown) • Same architecture used for SiPMbiasing in the Schwarzschild-Couder CTA Telescope K. Meagher (Georgia Tech) – SiPM Electronics for the Schwarzschild-Couder Telescope (presentation) 17/20

  25. Power supply board LV in (4.75 V – 6 V) Digital interface pins Jumpers to choose DAC/potentiometer for output voltage regulation HV out (64 V – 69 V) 18/20

More Related