Difference between revisions of "Aug 9, 2011 SiPM Electrical and Cooling"
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#* Need to find a good way of storing the SiPMs in preparation for installation | #* Need to find a good way of storing the SiPMs in preparation for installation | ||
#* Detailed testing of pre-production boards is underway. Grounding copper lines on the pre-production boards was increased from 1oz and 0.5 oz to 2 oz and 1 oz, respectively | #* Detailed testing of pre-production boards is underway. Grounding copper lines on the pre-production boards was increased from 1oz and 0.5 oz to 2 oz and 1 oz, respectively | ||
− | #* Balancing of reduced gain and ringing on the board is underway. The evaluation of the limits of the design will be completed by tomorrow. | + | #* Balancing the requirement of reduced gain and ringing on the board is underway. The evaluation of the limits of the design will be completed by tomorrow. |
#* Requests that we re-evaluate the requirement of reducing the gain by 2.5. | #* Requests that we re-evaluate the requirement of reducing the gain by 2.5. | ||
# Light guide gluing setup (Scot via e-mail) | # Light guide gluing setup (Scot via e-mail) | ||
#* I have completed the redesigned light guide "push" vacuum wand / base fabrication as of 1:30 p.m. today. | #* I have completed the redesigned light guide "push" vacuum wand / base fabrication as of 1:30 p.m. today. | ||
#* I ordered a 1 LB. bottle of Norland NOA 87 light guide UV adhesive on 08/17/2012 - PR # 321682 | #* I ordered a 1 LB. bottle of Norland NOA 87 light guide UV adhesive on 08/17/2012 - PR # 321682 |
Latest revision as of 18:41, 9 August 2012
Action Items from previous meetings
-
Develop front and back views of jumper sheets. (Jack)- This specifically includes the settings for the pre-production boards that are needed by Wed of next week.
- Test wrapping forms (Elton)
-
Order glue (and any other consumables) to glue light guides (Scot) -
Check new gluing jig for the light guides (Scot and Jim)
Tentative Agenda
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- SiPM production testing (everyone)
- SiPMs assignment for new boards
- Mechanical assembly (Jim)
- Temperature compensation (Jack)
- Electronic boards (Chris)
- Light guide gluing setup (Scot via e-mail)
- I have completed the redesigned light guide "push" vacuum wand / base fabrication as of 1:30 p.m. today.
- I ordered a 1 LB. bottle of Norland NOA 87 light guide UV adhesive on 08/17/2012 - PR # 321682
Minutes
Attending: Jack, Elton, Jim, Eugene, Fernando, Ivan, Chris, Yi
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- Yesterday we received the second shipment of 600 SiPMs from USM. They sailed through customs
- SiPM production testing (everyone)
- SiPMs assignment for new boards
- Shaun Krueger (student from UofR) has made a list of 80 SiPMs to be fitted to the pre-production boards
- Shaun has also compiled an assignment list of SiPMs to electronic boards for all 4000 sensors.
- Shaun's approach is to group SiPMs according to Vop.
- Replaced one R2 resistor with a fixed ~6KOhm resistor to compensate for low precision resistor value. Result is a 3 resistor trim, but covers the range needed
- Pre-production boards will be different from the production boards to avoid changing many resistors. Only one resistor per SiPM needs to be changed on the pre-production board.
- Final production units will have fixed values for the trim resistors, but different from the ones on the pre-production modules.
- Mechanical assembly (Jim)
- Glued thermistor boards to cooling plate
- Redesigned the clamping fixture
- Mechanical drawings are being checked; no subassemblies yet
- Mechanical hardware for pre-production boards all in house
- Temperature compensation (Jack)
- Generated jumper sheets for pre-production boards
- SiPMs have been selected and given to Chris for the pre-production boards
- Electronic boards (Chris)
- All thermistor and U boards are in
- Cables are in
- BCal LED monitoring board micro-Dsub connection done
- Thermal Mats cut
- Lemo board HFL interconnect board will arrive next week
- HFL cables (production) will be ordered as soon as the pre-production assembly is checked
- Electronic boards (Fernando)
- Need to find a good way of storing the SiPMs in preparation for installation
- Detailed testing of pre-production boards is underway. Grounding copper lines on the pre-production boards was increased from 1oz and 0.5 oz to 2 oz and 1 oz, respectively
- Balancing the requirement of reduced gain and ringing on the board is underway. The evaluation of the limits of the design will be completed by tomorrow.
- Requests that we re-evaluate the requirement of reducing the gain by 2.5.
- Light guide gluing setup (Scot via e-mail)
- I have completed the redesigned light guide "push" vacuum wand / base fabrication as of 1:30 p.m. today.
- I ordered a 1 LB. bottle of Norland NOA 87 light guide UV adhesive on 08/17/2012 - PR # 321682