Difference between revisions of "April 26, 2011 SiPM Electrical and Cooling"
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(Created page with "== Action Items from previous meetings == # Determine if swapped bias pins was accidental or in design (Chris) # Develop front and back views of jumper sheets. Also get latest v...") |
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== Minutes == | == Minutes == | ||
''Attending: | ''Attending: | ||
+ | |||
+ | # Announcements | ||
+ | # Action Items | ||
+ | # Schedule, reporting, and manpower (Elton) | ||
+ | # SiPM production testing (everyone) | ||
+ | ## Mechanical assembly (Scot) | ||
+ | ##* Cover plate has been installed and looks good | ||
+ | ##* Damaged cable connections have been repaired | ||
+ | ## Testing (Yi) | ||
+ | ##* Checking of new hardware is underway. Is almost ready | ||
+ | ##* Bobby and Tom went through a training session on Monday. | ||
+ | ##* Elton has prepared a Pansophy checklist/traveller for the SiPM testing procedure | ||
+ | ##* After putting on final touches, Bobby should start the testing | ||
+ | ##* Testing will start at about 10 deg C. | ||
+ | ##* Tests at lower temperature will require conditioning the air in the dark box. Fernando suggested some AC units based on Peltier coolers, which he will investigate as an option. | ||
+ | # Beam Test (Elton) | ||
+ | # See [https://cebaf.jlab.org/elog/elog.php?logbook=HDFCALTEST Beam test Log Book] for details | ||
+ | # Mechanical (Jim) | ||
+ | ## Light guide templates were ordered on Monday. Expect 2 week turn around time | ||
+ | # Mechanical drawings (Chuck) | ||
+ | # Temperature compensation (Jack) | ||
+ | # Preamp-summing (Chris and Fernando) | ||
+ | ## Procurement Decisions and timeline (should be completed by end of May) | ||
+ | ##* Precision thermistor resistors have at least a 10 week lead time. | ||
+ | ##** Will evaluate the SiPM samples already delivered to JLab and USM to determine the range or resistors required | ||
+ | ##** If entire set is consistent, we will inquire from Hamamatsu whether they expect any differences from new batches. | ||
+ | ##* Ringing on outputs | ||
+ | ##** Scope checks seem to show that the ringing is greatly reduced with optimized circuits | ||
+ | ##** Need to verify the wave forms with the beam test data | ||
+ | ##* Gain resistors | ||
+ | ##** Beam test data will also help us determine the operating point above breakdown (SiPM gain) and required ADC gain settings to match the FADC dynamic range. | ||
+ | # Light Guides | ||
+ | ## Jigs for gluing have arrived and need to be checked out | ||
+ | ## The clean tents need to be setup in the ESB and plan for production testing. |
Revision as of 17:48, 26 April 2012
Action Items from previous meetings
- Determine if swapped bias pins was accidental or in design (Chris)
- Develop front and back views of jumper sheets. Also get latest version of drawings (Jack)
-
Request Hamamatsu data sheets from Chile to be used as input to jumper settings for boards (Elton)
Tentative Agenda
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- SiPM production testing (everyone)
- Mechanical assembly (Scot)
- Mechanical (Jim)
- Mechanical drawings (Chuck)
- Temperature compensation (Jack)
- Preamp-summing (Chris)
Minutes
Attending:
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- SiPM production testing (everyone)
- Mechanical assembly (Scot)
- Cover plate has been installed and looks good
- Damaged cable connections have been repaired
- Testing (Yi)
- Checking of new hardware is underway. Is almost ready
- Bobby and Tom went through a training session on Monday.
- Elton has prepared a Pansophy checklist/traveller for the SiPM testing procedure
- After putting on final touches, Bobby should start the testing
- Testing will start at about 10 deg C.
- Tests at lower temperature will require conditioning the air in the dark box. Fernando suggested some AC units based on Peltier coolers, which he will investigate as an option.
- Mechanical assembly (Scot)
- Beam Test (Elton)
- See Beam test Log Book for details
- Mechanical (Jim)
- Light guide templates were ordered on Monday. Expect 2 week turn around time
- Mechanical drawings (Chuck)
- Temperature compensation (Jack)
- Preamp-summing (Chris and Fernando)
- Procurement Decisions and timeline (should be completed by end of May)
- Precision thermistor resistors have at least a 10 week lead time.
- Will evaluate the SiPM samples already delivered to JLab and USM to determine the range or resistors required
- If entire set is consistent, we will inquire from Hamamatsu whether they expect any differences from new batches.
- Ringing on outputs
- Scope checks seem to show that the ringing is greatly reduced with optimized circuits
- Need to verify the wave forms with the beam test data
- Gain resistors
- Beam test data will also help us determine the operating point above breakdown (SiPM gain) and required ADC gain settings to match the FADC dynamic range.
- Precision thermistor resistors have at least a 10 week lead time.
- Procurement Decisions and timeline (should be completed by end of May)
- Light Guides
- Jigs for gluing have arrived and need to be checked out
- The clean tents need to be setup in the ESB and plan for production testing.