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The SiPM Project

The SiPM Project. Advisors: Dr. Randal Ruchti Barry Baumbaugh Mike McKenna Teacher: Mark Kirzeder Student: Elizabeth Shearer. What is a SiPM?. Sil icon P hoto M ultiplier A new generation of detection system. An alternative to traditional PMTs.

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The SiPM Project

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  1. The SiPM Project Advisors: Dr. Randal Ruchti Barry Baumbaugh Mike McKenna Teacher: Mark Kirzeder Student: Elizabeth Shearer

  2. What is a SiPM? • Silicon Photo Multiplier • A new generation of detection system. • An alternative to traditional PMTs.

  3. SiPMs vs. PMTs • Relatively Large • High voltage • Expensive • Non-recoverable • Inconsistent signals • Affected by B – fields • Not as precise • Slower response time • Small • Low voltage • Relatively low cost • Recoverability • Signal consistency • Unaffected by B –field • Single photon counting ability • Fast response time

  4. SiPM Drawbacks • Optical cross talk • Temperature dependence on dark count • Susceptible to radiation?

  5. Summer 2008 Goals • Construct experimental apparatus • Devise experimental procedure to test SiPM performance • Voltage 69 – 71 Volts • Temperature RT - -35 Co • SiPM size 25 – 100 μm

  6. New Light Tight Box

  7. Cooling Experiment • Thermo Electric Coolers (TECs). Much more difficult than anticipated. • Factors tested • TEC Size • TEC Numbers • TEC arrangements • TEC current and voltage • Heat sink size • Cooling of heat sink, air vs. water

  8. Cooling Chamber Aluminum Heat Sink Ice Water Tube from Chiller TECs Copper SiPM Mount Temperature Probes Nitrogen Gas Tube

  9. Cooling Data – 3rd Try

  10. Cooling Data – 262nd Try

  11. Voltage & Temp Testing • To benchmark the SiPM an LED was pulsed • Data was gathered at varying temperatures and voltages • Thank you Betsy

  12. SiPM @ 69.4 V & 22 Co

  13. SiPM @ 69.4 V & 9 Co

  14. Conclusion • Continue to work on background noise in the system • Investigate SiPM performance below -20 Co • Hook SiPM to a scintillating tile and wave shifting fiber • Hook SiPM to a wave shifting and scintillating fiber

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