Difference between revisions of "May 6, 2010 Readout"
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# Serguei agreed to send out a testing proposal for comments, including preliminary circuit designs and list of available equipment at USM for reference. | # Serguei agreed to send out a testing proposal for comments, including preliminary circuit designs and list of available equipment at USM for reference. | ||
− | # Fill out loan agreement for SiPM arrays at UofR (Elton). | + | # <strike> Fill out loan agreement for SiPM arrays at UofR (Elton). </strike> |
# Start a bulleted list of testing for the SiPMs (Serguey). | # Start a bulleted list of testing for the SiPMs (Serguey). | ||
− | # | + | # <strike> Distribution of p.e. corresponding to each sensor within the readout sum (Andrei). </strike> |
= Documents to Review= | = Documents to Review= | ||
+ | |||
+ | * [[Image:SiPM contracting timeline v0.pdf]] | ||
+ | * [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1474 GlueX-doc-1474] BCAL Dynamic Range from the Simulation with FLUKA | ||
= Tentative Agenda = | = Tentative Agenda = | ||
Line 23: | Line 26: | ||
# Review of Action Items | # Review of Action Items | ||
# Update - USM | # Update - USM | ||
− | # | + | # USM MOU/contract update (Elton) |
+ | # Simulation runs | ||
# Geometry | # Geometry | ||
# [[SiPM Radiation Hardness Test]] (Yi) | # [[SiPM Radiation Hardness Test]] (Yi) | ||
Line 30: | Line 34: | ||
= Minutes = | = Minutes = | ||
− | Attending: | + | Attending: Will, Serguei, Alam (USM); George, Andrei (UofR); Elton, Chuck, Fernando, Beni, John, Yi |
+ | |||
+ | # Announcements | ||
+ | # Review of Action Items | ||
+ | # USM MOU/contract update (Elton) | ||
+ | #* Reviewed timeline for SiPM procurement and contract with USM and was discussed. | ||
+ | # Simulation runs | ||
+ | #* Andrei presented number of p.e. for 2x2 cm2 segments at 2.5 GeV at 12 deg. and center of readout segment. | ||
+ | #* Fernando: For the gain adjustment will need min and max for both upstream and downstream readouts | ||
+ | #* Beni: Based on the plots, we might want to consider summing 2, 2 and 6 instead of 3, 3 and 4. [Other arrangements should be considered in this optimization] | ||
+ | #* Eugene: What PDE is assumed? Andrei: The numbers use the QE for the Hamamatsu pmt of 18%. To obtain numbers hitting the SiPMs, we should adjust for response and light guide efficiency. | ||
+ | #* Cosmic-ray measurements to determine response of module to particles is underway. | ||
+ | # Update - USM | ||
+ | ## Light Guides | ||
+ | ##* Straight tapered Light guide produced at USM. 3.75deg angle included. Surface quality is being checked. | ||
+ | ##* After pliching would like to attach to baby Cal and measure light transmission. | ||
+ | ## SiPMs | ||
+ | ##* Test setup is under fabrication to test gain and dark current of 16 SiPMs at fixed temperatures between T=5-25 deg in DeltaT=5 deg steps. | ||
+ | ##* Will went through a slide presentation prepared by Alam Toro showing the test setup | ||
+ | ##* John: Are the cable connections between arrays and preamps a problem for the test? (they will be outside the light-tight temp-stabilized box. | ||
+ | ##* Goal is to measure response to blue (495 nm) LED system. Dark current to be measured in between LED pulses. | ||
+ | ##* Considering option for injecting test pulses onto electronics board. Several layers of the board will be devoted to ground planes to help shielding. | ||
+ | ##* USM does not have any arrays. It is presently working with single 3x3 mm2 Hamamatsu SiPMs. | ||
+ | ##* Side project includes using Zecotek 3x3 mm2 SiPMs for NA61. Measurements of this setup can be made available if it is of interest. The units have high pixel count (10^4/mm2), but low gain ~ 10^3 - 10^5. | ||
+ | # Geometry | ||
+ | #* Elton asked if STP files have been successfully transfered back and forth between JLab and USM. Procedures are in place but full circle has not been completed. | ||
+ | # [[SiPM Radiation Hardness Test]] (Yi) | ||
+ | #* After a 2 week cooldown in the Hall A labyrinth, they have been transfered to a location in the ARC for further testing. | ||
+ | #* Dark rate has decreased for both units (Hamamatus from 200 -> 135 microA, SensL from 1600->1100 micro A). | ||
+ | #* The measured change in amplitude could be (in part) attributed to radiation damage of the LED. However, the measured ratio of Hamamatu/SensL is not constant, which would be the case if only the LED was affected. | ||
+ | #* SiPMs will be continued to be monitored for recovery. The room temperature in the ARC is about 1.5 deg higher than in Hall A. | ||
+ | #* All documentation has been updated on the wiki page. | ||
+ | # Other/ Fernando passed on a couple of items from Carl, who was unable to attend: | ||
+ | #* Werner Boeglin has received one array for testing the start counter | ||
+ | #* Hamamatsu advertises the 2x2 sub-array used in our 4x4 arrays as a standard catalog item now, and is available for sale. |
Latest revision as of 17:12, 24 February 2017
Teleconference Time: 11:00 a.m. EST
- ESNET and EVO session
- Phone in CC F326 is 757-269-6337
- Phone:
- +1-800-377-8846 : US
- +1-888-276-7715 : Canada
- +1-302-709-8424 : International
- then enter participant code: 77438230# (remember the "#"). Phone connection only upon request.
Contents
Items for followup from previous meeting
- Serguei agreed to send out a testing proposal for comments, including preliminary circuit designs and list of available equipment at USM for reference.
-
Fill out loan agreement for SiPM arrays at UofR (Elton). - Start a bulleted list of testing for the SiPMs (Serguey).
-
Distribution of p.e. corresponding to each sensor within the readout sum (Andrei).
Documents to Review
- File:SiPM contracting timeline v0.pdf
- GlueX-doc-1474 BCAL Dynamic Range from the Simulation with FLUKA
Tentative Agenda
- Announcements
- Review of Action Items
- Update - USM
- USM MOU/contract update (Elton)
- Simulation runs
- Geometry
- SiPM Radiation Hardness Test (Yi)
- SiPM - Testing Schedules
- Light guides
Minutes
Attending: Will, Serguei, Alam (USM); George, Andrei (UofR); Elton, Chuck, Fernando, Beni, John, Yi
- Announcements
- Review of Action Items
- USM MOU/contract update (Elton)
- Reviewed timeline for SiPM procurement and contract with USM and was discussed.
- Simulation runs
- Andrei presented number of p.e. for 2x2 cm2 segments at 2.5 GeV at 12 deg. and center of readout segment.
- Fernando: For the gain adjustment will need min and max for both upstream and downstream readouts
- Beni: Based on the plots, we might want to consider summing 2, 2 and 6 instead of 3, 3 and 4. [Other arrangements should be considered in this optimization]
- Eugene: What PDE is assumed? Andrei: The numbers use the QE for the Hamamatsu pmt of 18%. To obtain numbers hitting the SiPMs, we should adjust for response and light guide efficiency.
- Cosmic-ray measurements to determine response of module to particles is underway.
- Update - USM
- Light Guides
- Straight tapered Light guide produced at USM. 3.75deg angle included. Surface quality is being checked.
- After pliching would like to attach to baby Cal and measure light transmission.
- SiPMs
- Test setup is under fabrication to test gain and dark current of 16 SiPMs at fixed temperatures between T=5-25 deg in DeltaT=5 deg steps.
- Will went through a slide presentation prepared by Alam Toro showing the test setup
- John: Are the cable connections between arrays and preamps a problem for the test? (they will be outside the light-tight temp-stabilized box.
- Goal is to measure response to blue (495 nm) LED system. Dark current to be measured in between LED pulses.
- Considering option for injecting test pulses onto electronics board. Several layers of the board will be devoted to ground planes to help shielding.
- USM does not have any arrays. It is presently working with single 3x3 mm2 Hamamatsu SiPMs.
- Side project includes using Zecotek 3x3 mm2 SiPMs for NA61. Measurements of this setup can be made available if it is of interest. The units have high pixel count (10^4/mm2), but low gain ~ 10^3 - 10^5.
- Light Guides
- Geometry
- Elton asked if STP files have been successfully transfered back and forth between JLab and USM. Procedures are in place but full circle has not been completed.
- SiPM Radiation Hardness Test (Yi)
- After a 2 week cooldown in the Hall A labyrinth, they have been transfered to a location in the ARC for further testing.
- Dark rate has decreased for both units (Hamamatus from 200 -> 135 microA, SensL from 1600->1100 micro A).
- The measured change in amplitude could be (in part) attributed to radiation damage of the LED. However, the measured ratio of Hamamatu/SensL is not constant, which would be the case if only the LED was affected.
- SiPMs will be continued to be monitored for recovery. The room temperature in the ARC is about 1.5 deg higher than in Hall A.
- All documentation has been updated on the wiki page.
- Other/ Fernando passed on a couple of items from Carl, who was unable to attend:
- Werner Boeglin has received one array for testing the start counter
- Hamamatsu advertises the 2x2 sub-array used in our 4x4 arrays as a standard catalog item now, and is available for sale.