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P.P. & APD gain ratio report—4 month testing

P.P. & APD gain ratio report—4 month testing. Ken Chiang, J.Y. Lin, Jeri Chang 2009/3/19. Two kinds of Samples. (photo pentode tubes). (avalanche photodiodes). Schematic Diagrams for APD. We use 400V for Serial No. AA0705 & 450V for Serial No. AA0724. Light Source: Blue LED

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P.P. & APD gain ratio report—4 month testing

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  1. P.P. & APD gain ratio report—4 month testing Ken Chiang, J.Y. Lin, Jeri Chang 2009/3/19

  2. Two kinds of Samples (photo pentode tubes) (avalanche photodiodes) Super Belle Meeting

  3. Schematic Diagrams for APD We use 400V for Serial No. AA0705 & 450V for Serial No. AA0724 • Light Source: Blue LED • Light Intensity: detected by PIN Photodiodesimulate very weak light (very simple scale) Super Belle Meeting

  4. Schematic Diagrams for P.P. Pentode mode Diode mode Super Belle Meeting

  5. March 2008 2009 Status of Gain factor of APD Gain Ratio is temperature sensitive. Super Belle Meeting

  6. Check temp. vs. Gain ratio of APD2009 Feb. results Super Belle Meeting

  7. 2009 2008 Status of Gain factor of PP Gain Ratio is NOT temperature sensitive. Super Belle Meeting

  8. 2008 2009 2008 2009 Output Voltage of APD (HV applied) Super Belle Meeting

  9. 2009 2008 2009 2008 Output Voltage of APD (LV applied) Super Belle Meeting

  10. 2008 2009 2009 2008 Output Voltage of PP (pentode mode) Super Belle Meeting

  11. Output Voltage of PP (diode mode) 2008 2009 2009 2008 Super Belle Meeting

  12. Next Steps • We will get some more APDs from KEK. (4 pcs of APD made by Hamamatsu.) • One of the APD will be attached on the pure CsI crystalOne pure CsI crystal, ~4cm tall, was shipped to Taiwan last week. (2 master students will work on it). Super Belle Meeting

  13. Simulation for the readout circuit (TINA software) Current from APD ~10,000 photons are expected to be seen. We use a almost same PCB to measure the high energy cosmic ray before. Function Generator Super Belle Meeting

  14. making a 1.5T magnetic field 2 undergraduate students are making a 1.5T magnetic field now. Because the temperature is too high while we applied current. We are thinking about the other way. Super Belle Meeting

  15. Summary • The gain ratio of PP and APD samples are under testing for 4 months. • The readout setup for pure CsI crystal+APD is in progress. • We are making a magnetic field in order to understand the effect on PP and APD. Super Belle Meeting

  16. Backup Slides • Setup pictures • Monitoring pictures Super Belle Meeting

  17. Setup APD P.P. Box Size Setup: Outside View Super Belle Meeting

  18. Inside the Box: P.P. The distance between LED and PP samples is 34cm. The wave length of blue LED is about 450 nm. P.P. PIN PD 20cm Blue LED Super Belle Meeting

  19. Inside the Box: APD The distance between LED and APD samples is 34cm. The wave length of blue LED is about 450 nm. APD PIN PD 20cm Blue LED Super Belle Meeting

  20. Output Monitoring Voltage Temperature Super Belle Meeting

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