Difference between revisions of "Jun 30, 2011 SiPM Electrical and Cooling"
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# Action Items | # Action Items | ||
# Schedule, reporting, and manpower (Elton) | # Schedule, reporting, and manpower (Elton) | ||
− | # SiPM testing (Carl and Yi) | + | #* Updated EVMS spread sheet |
+ | # SiPM testing (Carl) | ||
+ | #* Collecting equipment for production testing | ||
+ | #* Identified 5 out of 8 QDCs. | ||
+ | #* Computer ordered, expected by mid July | ||
+ | #* Crate will require v430 CERN-style backplane. Need to identify one. | ||
+ | #* Student is testing diffuse reflector. Finds uniformity +/-2% over a 4"x4" area | ||
+ | #* Carl will be attending the [http://www.ndip.fr/ New Developments in Photodetection] Conference next week. | ||
+ | # Semtec cables | ||
+ | #* Fernando and Chris have found coaxial assemblies which might be very useful. An off-the-shelf test piece 4' long (40pin connector) is $74. | ||
+ | #* Assume length of cables for testing will be 25 ft | ||
+ | #* Use 20-pin connector for each SiPM array and use only 16 pins | ||
+ | #* Estimated delivery time is 5-20 working days | ||
+ | # SiPM cooling tests (Yi) | ||
+ | #* Teaching student LabView programing for temp test | ||
+ | #* Waiting for preamp board, everything else is ready | ||
+ | #* Fernando and Chris will provide a working preamp board next week for testing by Yi and Jack | ||
+ | #* Drafting NIM paper for SiPM radiation test | ||
# Mechanical (Jim) | # Mechanical (Jim) | ||
+ | #* Model has been updated and transfered to Chuck | ||
+ | #* Drawings for transition board with connectors is being checked | ||
+ | #* John: Reminder to check the possibility of enlarging the 4-40 screws to hold the cooling plate | ||
# Mechanical drawings (Chuck) | # Mechanical drawings (Chuck) | ||
+ | #* Light guides will be updated by removing the flat section near the base | ||
# Geometry (Elton) | # Geometry (Elton) | ||
+ | #* No update | ||
# Temperature compensation (Jack) | # Temperature compensation (Jack) | ||
+ | #* Waiting for board from Fernando | ||
# Preamp-summing (Fernando) | # Preamp-summing (Fernando) | ||
+ | #* Presented performance of new circuit with 2" off-the-shelf cables. Rise time optimized by adding 2 Ohm resistor to circuit. | ||
+ | #* Present design meets the 15 ns rise time and 80 ns pulse length specification | ||
+ | #* GlueX note almost ready and will submit to Doc Db. Elton suggested to add a table with relevant information. | ||
+ | #* Decided to make changes to the preamp boards with the new resistance values and make available to Yi and Jack for testing. |
Latest revision as of 18:07, 30 June 2011
References
Action Items from previous meetings
- Check impact of material at low end of readout, both in the tubes for cooling fluid but also in the Cu cooling plate. Need to check effect on particle trajectories.
-
Fernando will check son SEMTEC cable assemblies. -
Calculate acceptance for various heights of the flat section (Elton).
Tentative Agenda
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- SiPM testing (Carl and Yi)
- Mechanical (Jim)
- Mechanical drawings (Chuck)
- Geometry (Elton)
- Temperature compensation (Jack)
- Preamp-summing (Fernando)
Minutes
Attending: Jim, Yi, John, Elton, Fernando, Chris, Chuck, Carl
- Announcements
- Action Items
- Schedule, reporting, and manpower (Elton)
- Updated EVMS spread sheet
- SiPM testing (Carl)
- Collecting equipment for production testing
- Identified 5 out of 8 QDCs.
- Computer ordered, expected by mid July
- Crate will require v430 CERN-style backplane. Need to identify one.
- Student is testing diffuse reflector. Finds uniformity +/-2% over a 4"x4" area
- Carl will be attending the New Developments in Photodetection Conference next week.
- Semtec cables
- Fernando and Chris have found coaxial assemblies which might be very useful. An off-the-shelf test piece 4' long (40pin connector) is $74.
- Assume length of cables for testing will be 25 ft
- Use 20-pin connector for each SiPM array and use only 16 pins
- Estimated delivery time is 5-20 working days
- SiPM cooling tests (Yi)
- Teaching student LabView programing for temp test
- Waiting for preamp board, everything else is ready
- Fernando and Chris will provide a working preamp board next week for testing by Yi and Jack
- Drafting NIM paper for SiPM radiation test
- Mechanical (Jim)
- Model has been updated and transfered to Chuck
- Drawings for transition board with connectors is being checked
- John: Reminder to check the possibility of enlarging the 4-40 screws to hold the cooling plate
- Mechanical drawings (Chuck)
- Light guides will be updated by removing the flat section near the base
- Geometry (Elton)
- No update
- Temperature compensation (Jack)
- Waiting for board from Fernando
- Preamp-summing (Fernando)
- Presented performance of new circuit with 2" off-the-shelf cables. Rise time optimized by adding 2 Ohm resistor to circuit.
- Present design meets the 15 ns rise time and 80 ns pulse length specification
- GlueX note almost ready and will submit to Doc Db. Elton suggested to add a table with relevant information.
- Decided to make changes to the preamp boards with the new resistance values and make available to Yi and Jack for testing.