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Electronics for SiPM readout

Electronics for SiPM readout. Francois.powolny@cern.ch pierre.jarron@cern.ch. Electronics developed at CERN. Principle of of SiPM. SiPM performance. SiPM + NINO. Electronics developed at CERN. SiPM performance. SiPM + NINO. CERN electronics. NINO chip developed for Alice TOF

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Electronics for SiPM readout

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  1. Electronics for SiPM readout Francois.powolny@cern.ch pierre.jarron@cern.ch F. POWOLNY 17 / 03 / 2010

  2. Electronics developed at CERN Principle of of SiPM SiPM performance SiPM + NINO F. POWOLNY 17 / 03 / 2010

  3. Electronics developed at CERN SiPM performance SiPM + NINO F. POWOLNY 17 / 03 / 2010

  4. CERN electronics • NINO chip • developed for Alice TOF • Ultra-fast low-power discriminator. • 8 and 32 channels (250 nm CMOS) • <10 ps rms time jitter • Time over threshold technique • HPTDC • Bin size until 25 ps • Used in ALICE TOF • NA62 – GTK ASIC • FE: 70 ps jitter rms • TDC: < 25 ps non-linearity F. POWOLNY 17 / 03 / 2010

  5. NINO principle F. POWOLNY 17 / 03 / 2010

  6. NINO: time over threshold Input stage output t Out1+ Out1-(t) Out+(t) Time walk Non linear function of the charge Output of Nino t F. POWOLNY 17 / 03 / 2010

  7. GTK ASIC: Demonstrator developed and tested FE: 70 ps jitter RMS TDC: < 25 ps non-linearity People to contact: Pierre.Jarron@cern.ch or Alexander.Kluge@cern.ch F. POWOLNY 17 / 03 / 2010

  8. Electronics developed at CERN SiPM performance SiPM + NINO F. POWOLNY 17 / 03 / 2010

  9. SiPMs from ST Microelectronics 1x1 mm2 ~400 cells PDE ~ 20% @ 400nm Dark count rate ~ 1kHz/cell  400kHz F. POWOLNY 17 / 03 / 2010

  10. laser SiPM Pulse height delay Laser pulse 50ps FWHM F. POWOLNY 17 / 03 / 2010

  11. Delay vs. amplitude @33V F. POWOLNY 17 / 03 / 2010

  12. Electronics developed at CERN SiPM performance SiPM + NINO F. POWOLNY 17 / 03 / 2010

  13. Keithley 2410 33V Current measurement Trigger on the laser NINO 50W 50W LeCroy scope Laser pulse F. POWOLNY 17 / 03 / 2010

  14. Pulse width vs. delayscatter plot Delay [ns] Pulse width [ns] No. of Counts No. of Counts F. POWOLNY 17 / 03 / 2010

  15. Time resolution SiPM+NINO Delay [ns] s1=183 ps rms s2=136 ps s3=117 ps s4=94 ps Pulse width [ns] No. of Counts F. POWOLNY 17 / 03 / 2010

  16. Conclusions • Time resolution of ~180ps rms on the detection of a single 405nm laser photons. • Time resolution dominated by the scintillator length • Thermal noise of ~400kHz on 1x1mm2 SiPMs • New test board on development using differential readout • New version of NINO including 32 channels available F. POWOLNY 17 / 03 / 2010

  17. F. POWOLNY 17 / 03 / 2010

  18. 1 2 Delay [ns] s1 = 181 ps s2 = 130 ps s3 = 109 ps Pulse height [uA] 3 F. POWOLNY 17 / 03 / 2010

  19. Time resolution (rms) vs. Npe Blue laser 50ps FWHM  Synchronous photons F. POWOLNY 17 / 03 / 2010

  20. 1 2 3 4 5 6 7 8 IL 90 No. of Counts Pulse width [ns] IL 92 No. of Counts Pulse width [ns] IL 95 No. of Counts F. POWOLNY 17 / 03 / 2010 Pulse width [ns]

  21. 2 1 negligible Delay [ns] Pulse width [ns] No. of Counts 3 No. of Counts negligible F. POWOLNY 17 / 03 / 2010

  22. Time resolution due to photon transit in the scintillator lost 123 57 transmitted lost 49 131 147 33 reflected 180 0 LSO n=1.85 Si grease n=1.4 lost y Angles leading to the detection of the photon Air n=1 Angles leading to the loss of the photon x z • For 1 photon: F. POWOLNY 17 / 03 / 2010

  23. Differential readout of the SiPM 200W 100pF STM 3x3 mm2 100pF 200W F. POWOLNY 17 / 03 / 2010

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