Difference between revisions of "Feb 10, 2011 Readout"
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* JLab Phone in CC L207 is 757-269-7084 | * JLab Phone in CC L207 is 757-269-7084 | ||
* Phone in the Regina Videoconference Suite is 306-585-4204 | * Phone in the Regina Videoconference Suite is 306-585-4204 | ||
− | * Phone | + | * Phone connection only upon request. |
− | ** +1- | + | ** +1-866-740-1260 : US+Canada |
− | + | ** +1-303-248-0285 : International | |
− | ** +1- | + | ** then enter participant code: 3421244# (remember the "#"). P |
− | ** then enter participant code: | + | ** or www.readytalk.com (and code without the #) |
=Items for followup from previous meeting= | =Items for followup from previous meeting= | ||
Line 15: | Line 15: | ||
# Collect this information of testing (including goals and setup) on the wiki for ease of presenting information. (USM, JLab, Regina) | # Collect this information of testing (including goals and setup) on the wiki for ease of presenting information. (USM, JLab, Regina) | ||
# Detailed schedule for testing at USM (Elton and Will). In progress | # Detailed schedule for testing at USM (Elton and Will). In progress | ||
− | # Determine total need of light guides for work at UofR, Athens and JLab (Elton, Zisis, Christina). | + | # <strike> Determine total need of light guides for work at UofR, Athens and JLab (Elton, Zisis, Christina). </strike> |
+ | # <strike> Update on simulation with summed cells (Andrei and Irina) </strike> | ||
+ | # Update Document Control at JLab with signed copies of QA (UofR), QC/QA (IU), and procedures for signoff of non-conforming items (Elton and Tim). | ||
= Documents to Review= | = Documents to Review= | ||
Line 23: | Line 25: | ||
# Announcements | # Announcements | ||
# Review of Action Items | # Review of Action Items | ||
− | |||
− | |||
# USM update | # USM update | ||
# SiPM update | # SiPM update | ||
− | |||
#* First Article testing (Carl and Yi) | #* First Article testing (Carl and Yi) | ||
+ | #* Regina preparations | ||
# Simulations | # Simulations | ||
− | # Electronics/cooling | + | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1702 Statistics of pi0 and etas for Bcal calibration] Elton |
+ | # Electronics/cooling | ||
# Geometry and light guides | # Geometry and light guides | ||
− | |||
= Minutes = | = Minutes = | ||
− | ''Attending: | + | ''Attending: Elton, Yi, Fernando, Beni, Tim, Eugene (JLab); Will (USM); Zisis, Andrei (UofR). |
+ | |||
+ | # Announcements | ||
+ | # Review of Action Items | ||
+ | ## Light guides: UofR requested 15, Athens requested 15. JLab will need 80 to instrument both sides of a calorimeter module. | ||
+ | ## Will asked what sizes are needed for UofR and Athens. Zisis will revisit this | ||
+ | ## JLab will need twice the full set of 40 guides (4x20 types). Elton mentioned that it might make sense to request this quantity as part of a first article on the light guide procurement. | ||
+ | # USM update (Will) | ||
+ | ## Making good progress on many fronts. The university is closed for a month of summer break. However, the Center continues to work with Iñaki, Alam and new technician. | ||
+ | ## Light box is under construction (intend to weld next week, instead of screw) | ||
+ | ## Prototype electrical board II: Alam estimates it is 80% complete. Final selection of buffer for amplifier is required. Likely sent to China for manufacturer. | ||
+ | ##* Elton offered that Fernando could review the schematics. Will to check if he wants us to do this | ||
+ | ## Light guides: rooms for prototyping and production are being reconfigured, which will allow installation of the large CNC machine. USM infrastructure group has the design and will provide a quote in 5 days. | ||
+ | ## Hamamatsu has been contacted for a quote to respond to JLab. USM will have to take responsibility for shipping FOB New Jersey. Quote will be for > 2800 units. Hamamatsu has indicated that the price per unit will not change beyond that amount. USM is contemplating he purchase of additional units beyond the Jlab requirement. | ||
+ | ## Elton said that JLab procurement is close to issuing the RFP to Chile. | ||
+ | # SiPM update | ||
+ | ## First Article testing (Carl and Yi) | ||
+ | ##* Yi has ordered some parts and all have been received. | ||
+ | ##* All labview drivers have been written, but test lacks integration | ||
+ | ##* Confidence that the setup will the ready before first article units arrive. | ||
+ | ## Regina preparations | ||
+ | ##* Laser head was sent yesterday for repairs. Expect return from Germany in about a month. | ||
+ | ##* Test setup is being reactivated and will be checked with existing SiPMs. | ||
+ | # Simulations | ||
+ | ## Regina: Irina has run two configurations a) unsummed b) 2x4(inner) + 2x2(outer) configurations. | ||
+ | ##* There are questions about the output, and comparisons with IU results are in progress | ||
+ | ##* Andrei will report at the cal working group meeting when IU is present to discuss their initial data on energy resolution and other results. | ||
+ | ## [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1702 Statistics of pi0 and etas for Bcal calibration] Elton | ||
+ | ##* Elton ran bggen to obtain some estimates of the expected statistics for pi0 and eta production for Eg>0.5 GeV, which might be useful for Bcal calibration. | ||
+ | ##* The estimates are 16 M pi0 and 3 M etas with both photons in the Bcal and Eg>0.5 GeV in 10 hours or data at 10^7/s. | ||
+ | ##* Eugene: Noted that there are factors that will reduce these numbers for a realistic analysis | ||
+ | ##* Will: Number of photons at the upstream end may be relatively small. It would be useful to plot the angular distribution. | ||
+ | # Electronics/cooling (Fernando) | ||
+ | #* Optimizing the front-end | ||
+ | #* Goal is to produce amplifier with very low noise. Individual cells have a capacitance of 5.1 nF, array capacitance is 320 pF. | ||
+ | #* Successfully imported board outline from mechanical drawings | ||
+ | #* Geometrical constraints on connectors at the inner part of the wedge are very tight and may need adjustments. The support structure including cooling tubes may need to be revisited. | ||
+ | # Geometry and light guides | ||
+ | #* Zisis: Noted that the light guides may require features machined for attachment of the monitoring system. For example, one might need to drill a hole to insert light fibers. | ||
+ | #* Will: It would be most efficient to add these features during fabrication. | ||
+ | #* Andrei added some details regarding his tests: | ||
+ | #** Small 1 mm hole, 2.5 mm deep was drilled into the side of a WC. A short fiber piece was glued into the hole and the other side was glued to the LED. LED was flashed at a bias of about 9.3 V (relatively low). Signal at far end was 4.5 V. Signal at near end was 2 V. The large pulses give us plenty of room for adjustment. |
Latest revision as of 16:52, 24 February 2017
Teleconference Time: 10:30 a.m. EST
- ESNET 8542553 and EVO session
- 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
- Phone connection only upon request.
- +1-866-740-1260 : US+Canada
- +1-303-248-0285 : International
- then enter participant code: 3421244# (remember the "#"). P
- or www.readytalk.com (and code without the #)
Contents
Items for followup from previous meeting
- Collect this information of testing (including goals and setup) on the wiki for ease of presenting information. (USM, JLab, Regina)
- Detailed schedule for testing at USM (Elton and Will). In progress
-
Determine total need of light guides for work at UofR, Athens and JLab (Elton, Zisis, Christina). -
Update on simulation with summed cells (Andrei and Irina) - Update Document Control at JLab with signed copies of QA (UofR), QC/QA (IU), and procedures for signoff of non-conforming items (Elton and Tim).
Documents to Review
Tentative Agenda
- Announcements
- Review of Action Items
- USM update
- SiPM update
- First Article testing (Carl and Yi)
- Regina preparations
- Simulations
- Electronics/cooling
- Geometry and light guides
Minutes
Attending: Elton, Yi, Fernando, Beni, Tim, Eugene (JLab); Will (USM); Zisis, Andrei (UofR).
- Announcements
- Review of Action Items
- Light guides: UofR requested 15, Athens requested 15. JLab will need 80 to instrument both sides of a calorimeter module.
- Will asked what sizes are needed for UofR and Athens. Zisis will revisit this
- JLab will need twice the full set of 40 guides (4x20 types). Elton mentioned that it might make sense to request this quantity as part of a first article on the light guide procurement.
- USM update (Will)
- Making good progress on many fronts. The university is closed for a month of summer break. However, the Center continues to work with Iñaki, Alam and new technician.
- Light box is under construction (intend to weld next week, instead of screw)
- Prototype electrical board II: Alam estimates it is 80% complete. Final selection of buffer for amplifier is required. Likely sent to China for manufacturer.
- Elton offered that Fernando could review the schematics. Will to check if he wants us to do this
- Light guides: rooms for prototyping and production are being reconfigured, which will allow installation of the large CNC machine. USM infrastructure group has the design and will provide a quote in 5 days.
- Hamamatsu has been contacted for a quote to respond to JLab. USM will have to take responsibility for shipping FOB New Jersey. Quote will be for > 2800 units. Hamamatsu has indicated that the price per unit will not change beyond that amount. USM is contemplating he purchase of additional units beyond the Jlab requirement.
- Elton said that JLab procurement is close to issuing the RFP to Chile.
- SiPM update
- First Article testing (Carl and Yi)
- Yi has ordered some parts and all have been received.
- All labview drivers have been written, but test lacks integration
- Confidence that the setup will the ready before first article units arrive.
- Regina preparations
- Laser head was sent yesterday for repairs. Expect return from Germany in about a month.
- Test setup is being reactivated and will be checked with existing SiPMs.
- First Article testing (Carl and Yi)
- Simulations
- Regina: Irina has run two configurations a) unsummed b) 2x4(inner) + 2x2(outer) configurations.
- There are questions about the output, and comparisons with IU results are in progress
- Andrei will report at the cal working group meeting when IU is present to discuss their initial data on energy resolution and other results.
- Statistics of pi0 and etas for Bcal calibration Elton
- Elton ran bggen to obtain some estimates of the expected statistics for pi0 and eta production for Eg>0.5 GeV, which might be useful for Bcal calibration.
- The estimates are 16 M pi0 and 3 M etas with both photons in the Bcal and Eg>0.5 GeV in 10 hours or data at 10^7/s.
- Eugene: Noted that there are factors that will reduce these numbers for a realistic analysis
- Will: Number of photons at the upstream end may be relatively small. It would be useful to plot the angular distribution.
- Regina: Irina has run two configurations a) unsummed b) 2x4(inner) + 2x2(outer) configurations.
- Electronics/cooling (Fernando)
- Optimizing the front-end
- Goal is to produce amplifier with very low noise. Individual cells have a capacitance of 5.1 nF, array capacitance is 320 pF.
- Successfully imported board outline from mechanical drawings
- Geometrical constraints on connectors at the inner part of the wedge are very tight and may need adjustments. The support structure including cooling tubes may need to be revisited.
- Geometry and light guides
- Zisis: Noted that the light guides may require features machined for attachment of the monitoring system. For example, one might need to drill a hole to insert light fibers.
- Will: It would be most efficient to add these features during fabrication.
- Andrei added some details regarding his tests:
- Small 1 mm hole, 2.5 mm deep was drilled into the side of a WC. A short fiber piece was glued into the hole and the other side was glued to the LED. LED was flashed at a bias of about 9.3 V (relatively low). Signal at far end was 4.5 V. Signal at near end was 2 V. The large pulses give us plenty of room for adjustment.