Feb 9, 2011 SiPM Electrical and Cooling

Action Items from previous meetings

1. Populate interface cards to the ADC (Chris)
2. Complete 3 remaining boards for SiPM testing (Chris)
3. Determine if swapped bias pins was accidental or in design (Chris)
4. Make a second SiPM extraction tool for USM (Jim and Scot)

Tentative Agenda

1. Announcements
2. Action Items
3. Schedule, reporting, and manpower (Elton)
4. SiPM production testing (everyone)
5. Mechanical assembly (Scot)
6. Mechanical (Jim)
7. Mechanical drawings (Chuck)
8. Temperature compensation (Jack)
9. Preamp-summing (Fernando/Chris)
10. SiPM testing (Ivan)

Minutes

Attending: Jack,, Carl, Scot, Chris, Yi, John, Elton, Jim, Eugene

1. Announcements
2. Action Items
3. Schedule, reporting, and manpower (Elton)
4. SiPM production testing (everyone)
   1. OSP (Carl)
      • OSP submitted. Bert will take the next step
      • Ordered micro-switches to interlock box with power supply
      • Ordered anti-static straps, flash lights
      • Scot: Added grounding wire for the support plate in the box. Discussion on where to attach. Suggestion to use the VME crate ground, but test with/without connection.
   2. Software (YI)
      • Control software is ready
      • Analysis software is advancing to use the JLab farm
   3. Hardware setup (Yi)
      • Need additional low voltage cables
      • Once complete, we will need to establish training for the setup
      • Recheck light uniformity
      • Carl: The light uniformity left-right is within 1%
      • The top two rows are about 4% lower than the middle two
      • Preamp 10 Ohm output resistor has been replaced by a 0.1 microF capacitor to eliminate the DC offset
   4. Temperature for tests
      • Presently operating at 9 deg C
      • Plan: test at one temperature first and then repeat at second temperature to establish temp dependence.
5. Mechanical assembly (Scot)
6. Mechanical (Jim)
7. Mechanical drawings (Chuck)
8. Temperature compensation (Jack)
9. Preamp-summing (Fernando/Chris)
10. SiPM testing (Ivan)