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AMD & SSSD Two SiPM-based scintillation detectors for Auger - PowerPoint PPT Presentation

Feb 01, 2023 •144 likes •555 views

AMD & SSSD Two SiPM-based scintillation detectors for Auger Johannes Schumacher for the Pierre Auger Collaboration HAP workshop Feb. 2016 Outline Motivation for SiPMs Part 1: AMD Aachen Muon Detector Part 2: SSSD SiPMs

  1. AMD & SSSD Two SiPM-based scintillation detectors for Auger Johannes Schumacher for the Pierre Auger Collaboration HAP workshop Feb. 2016

  2. Outline • Motivation for SiPMs • Part 1: AMD – Aachen Muon Detector • Part 2: SSSD – SiPMs for the Scintillation Surface Detector in the scope of AugerPrime

  3. 6 mm Silicon Photomultipliers aka SiPMs, MPPCs, G- APDs, …

  4. 1x SiPM eq. circuit ∑ Rate / arb.u. dark noise only ∫ dt Charge / arb.u.

  5. 1x SiPM eq. circuit ∑ Rate / arb.u. dark noise + signal ∫ dt Charge / arb.u.

  6. Based on datasheet values Why SiPMs? WLS fibres … with fibre emission

  7. PoS(ICRC2015)596 SD tank AMD The Aachen Muon Detector (AMD) Seed-funded project: a SiPM-based prototype muon detector

  8. Hamamatsu S12571-50P SiPM

  9. Steel housing Easiroc Seed-funded for ½ detector

  10. Optical Scintillator efficiency test stand coupling (SiPM side) μ Optical coupling measure impacts of different ... • (scint. side) ... scintillator wrapping techniques • ... fibre conditioning techniques

  11. Example: different wrapping techniques Slightly varying efficiency Tyvek UV Teflon remainder: Tyvek Efficiency not matter of wrapping technique, but more likely a matter of wrapping experience!

  12. To do list • test of water/light tightness of steel housing next months • wrapping of remaining 24 naked scintillator tiles by hand • test measurements of scintillator tile efficiency vs. impact position

  13. SiPMs for the Scintillation Surface Detector (SSD) In the scope of AugerPrime

  14. SSD - overview Scintillator bars “Cookie” WLS fibres coupled to a single optical coupling ( “ cookie “) WLS fibres  single large area photosensor needed

  15. SiPM solution for prototype detector Developed May/June 2015 Hi & Lo gain out 5 weeks development Pre-amps µC, DAC, LDO DC/DC 12 V in SiPM & T-sensor Cone based on 6x6 mm^2 SensL C-series “cookie” enters here

  16. SiPM solution installed in Argentina

  17. SD event display First data SiPM (hi) SD PMT 2 (hi) SD PMT 3 (hi) SiPM (low) SD PMT 2 (low) SD PMT 3 (low)

  18. Charge histogram no “fingers”!!! (due to electronic problems, i.a.) SiPM noise + electronic noise Signal?

  19. Charge histogram Subtract noise by applying exponential fit to “low p.e.” Signal!

  20. Changes • Improved electronics  less electronic noise • Improved cone  higher efficiency • “ better “ SiPM  less dark noise, less crosstalk, higher efficiency

  21. - Improved electronics - Improved cone - better SiPM

  22. Cone SiPM

  23. Hamamatsu S13360-6050PE, low crosstalk version ≈ 13 p.e. “fingers”!

  24. Measurement in Aachen SSD scintillator bars triggered by AMD sc. tiles Fibres SiPM No cone! (Expect increased efficiency)

  25. ≈ 23 p.e. thicker bars!

  26. Summary/outlook • Currently working on a two-channel SiPM solution for AugerPrime • electronics will be finished in March • shipping in mid-April together with aluminium housing from KIT to Argentina or in summer • tests (optical coupling, efficiency, reliability, noise, ...) will be done until mid-April

  27. Conclusion • SiPMs are an excellent choice for WLS-fibre read- out, due to high efficiency • Low noise, high dynamic range SiPMs available!

  28. Appendix some additional measurements

  29. ≈ 5%

  30. measurement

  31. simulation

  33. /K courtesy of Hamamatsu

  34. /K courtesy of Hamamatsu

  35. courtesy of Hamamatsu

  36. courtesy of SensL

  37. courtesy of SensL

  38. courtesy of SensL

  39. courtesy of SensL

  40. courtesy of SensL

  41. courtesy of SensL

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