Difference between revisions of "Jan 20, 2012 Readout"
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=Minutes= | =Minutes= | ||
| − | ''Attending: Zisis, Andrei, George, Mermoose (UofR); Carl, Yi, Elton, Eugene (JLab); Will, Serguei, Hayk (USM) | + | ''Attending: Mermoos, Zisis, Andrei, George, Mermoose (UofR); Carl, Yi, Elton, Eugene (JLab); Will, Serguei, Hayk (USM) |
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# Announcements | # Announcements | ||
# SiPM [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1890 PDE extraction] at Regina | # SiPM [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1890 PDE extraction] at Regina | ||
| + | #* Three methods at 460 nm, overvoltage? | ||
| + | #* Measured QE is 17-23% | ||
| + | #* Systematics: Illumination covers the cross macro-fill area (80% of illuminated circle, 89% of SiPM square). All methods include the cross talk (~10%). The first item yields lower PDE, the second yields higher PDE. | ||
| + | #* Will: Inquired about the uniformity of illumination, which could also affect the coverage of the active/dead area | ||
# [[Media:Comparison.pdf | Comparison of PDE measurements in literature]] (Elton) | # [[Media:Comparison.pdf | Comparison of PDE measurements in literature]] (Elton) | ||
# [[Media:Gain calculation.pdf | Comparison of Current vs Rate]] (Yi) | # [[Media:Gain calculation.pdf | Comparison of Current vs Rate]] (Yi) | ||
| + | #* Based on comparison of current vs count rates, expects current measurements of PDE to overestimate by about 3 | ||
# Updates from USM | # Updates from USM | ||
# Discussion on qualification of USM setup for production testing | # Discussion on qualification of USM setup for production testing | ||
Revision as of 16:11, 20 January 2012
Teleconference Time: 11:00 a.m. EST'
- ESNET (Number is 8542553) and EVO session (GlueX Calorimetry meeting room)
- Phone connection only upon request.
- +1-866-740-1260 : US+Canada
- +1-303-248-0285 : International
- then enter participant code: 3421244# (remember the "#").
- or www.readytalk.com (and code without the #)
Contents
Participant Direct Lines
- JLab Phone: in CC F326 is 757-269-6337 (usual room)
- JLab Phone in CC L207 is 757-269-7084
- Phone in the Regina Videoconference Suite is 306-585-4204
- Athens Phone: in Christina's office is 011-30-210-727-6947
Presentations from recent meetings
- Update from USM at Bcal Readout Meeting
- Presentations at Cal Working Group Meeting
Tentative Agenda
- Announcements
- SiPM PDE extraction at Regina
- Comparison of PDE measurements in literature (Elton)
- Comparison of Current vs Rate (Yi)
- Updates from USM
- Discussion on qualification of USM setup for production testing
- Comparison of dark rate, cross talk
- Thermal contact of SiPMs to cooling plate
- Insertion and extraction procedures
Minutes
Attending: Mermoos, Zisis, Andrei, George, Mermoose (UofR); Carl, Yi, Elton, Eugene (JLab); Will, Serguei, Hayk (USM)
- Announcements
- SiPM PDE extraction at Regina
- Three methods at 460 nm, overvoltage?
- Measured QE is 17-23%
- Systematics: Illumination covers the cross macro-fill area (80% of illuminated circle, 89% of SiPM square). All methods include the cross talk (~10%). The first item yields lower PDE, the second yields higher PDE.
- Will: Inquired about the uniformity of illumination, which could also affect the coverage of the active/dead area
- Comparison of PDE measurements in literature (Elton)
- Comparison of Current vs Rate (Yi)
- Based on comparison of current vs count rates, expects current measurements of PDE to overestimate by about 3
- Updates from USM
- Discussion on qualification of USM setup for production testing
- Comparison of dark rate, cross talk
- Thermal contact of SiPMs to cooling plate
- Insertion and extraction procedures
