Difference between revisions of "Jul 17, 2012 Calorimetry"
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## LED system on Mini BCAL | ## LED system on Mini BCAL | ||
##* [[Media:Mini_BCAL.pdf|LED System, 2012 Calorimetry]] | ##* [[Media:Mini_BCAL.pdf|LED System, 2012 Calorimetry]] | ||
+ | ##* Tara presented data using the LED monitoring system. Showed a) data of amplitude vs. LED bias voltage b) some data on cross talk c) stability data for a run over the weekend | ||
+ | ##* Some data are still not fully digested. There appear to be some pedestal shifts that are not completely understood. Most channels show cross talk of about 1%, but one shows cross talk of up to 10% and needs investigation | ||
+ | ##* Christina: Need to systematically understand each individual channel before evaluating the cross talk | ||
+ | ##* Beni: Shift of light guides from one side compared to the other could lead to apparent optical cross talk | ||
+ | ##* Andrei: Suggests that we disconnect the cables to selected LEDs and check for electronic cross talk. Elton: We can do this once and should plan a program to do this once other tests are completed, because it won't be possible to recable the LEDs. | ||
+ | ##* George: A signature of electronic cross talk (and capacitative coupling) might be distorted signals and/or time shifts relative to the LED pulse. Elton: We have looked at the scope for such behavior and find none. | ||
+ | ## Athens (Christina) | ||
+ | ##* George L. has delivered three SiPMs and electronics to Athens. They will hook them up to the Baby cal and complete similar studies to those done here at JLab. | ||
+ | ##* Athens has a single power supply so will need to find a way to power three SiPMs at the same time. The Vop values should be available with the SiPMs. We also have that information in a data base at JLab. | ||
+ | ##* Production: LEDS have arrived in Geneva; flexiboard delivery is expected for Aug 6 | ||
# FCAL | # FCAL | ||
## Construction Status | ## Construction Status |
Revision as of 16:51, 17 July 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
Items for followup from previous meeting(s)
- Fcal
-
When to ship structure to JLab? (Elton and Tim to review schedule)Should be ready by mid to late August.
-
- SiPMs
-
Show distribution of response uniformity of all SiPMs compared to specifications.See today's presentation
-
Tentative Agenda
- Announcements
- Review of Action Items
- Monitoring
- LED system on Mini BCAL
- FCAL
- Construction Status
- 2011 Hall B FCAL Beam Test (John)
- BCAL
- Activities at JLab (Module positioning, SiPM binning, LG Travellers)
- Cosmics at Regina
- Update on BCAL Beam Tests 2012
- USM update
- SiPM Update (Javiera)
- Working Point Analysis (Orlando)
- Light guides (Iñaki)
- TDR update
- Instructions for the TDR (You must be logged into the wiki to access this page).
- We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
- Calibration of Calorimeters
- Simulations/Reconstruction
- BCAL Simulation Status Update (David)
- Any other business
Minutes
Attendees: David, Beni, Tara, Elton, Yi, John L. (Jlab); Zisis, Andrei (UofR); George, Stratos, Christina (Athens); Javiera, Orlando, Alam, Iñaki (USM); Matt (IU)
- Announcements
- Review of Action Items
- Monitoring
- LED system on Mini BCAL
- LED System, 2012 Calorimetry
- Tara presented data using the LED monitoring system. Showed a) data of amplitude vs. LED bias voltage b) some data on cross talk c) stability data for a run over the weekend
- Some data are still not fully digested. There appear to be some pedestal shifts that are not completely understood. Most channels show cross talk of about 1%, but one shows cross talk of up to 10% and needs investigation
- Christina: Need to systematically understand each individual channel before evaluating the cross talk
- Beni: Shift of light guides from one side compared to the other could lead to apparent optical cross talk
- Andrei: Suggests that we disconnect the cables to selected LEDs and check for electronic cross talk. Elton: We can do this once and should plan a program to do this once other tests are completed, because it won't be possible to recable the LEDs.
- George: A signature of electronic cross talk (and capacitative coupling) might be distorted signals and/or time shifts relative to the LED pulse. Elton: We have looked at the scope for such behavior and find none.
- Athens (Christina)
- George L. has delivered three SiPMs and electronics to Athens. They will hook them up to the Baby cal and complete similar studies to those done here at JLab.
- Athens has a single power supply so will need to find a way to power three SiPMs at the same time. The Vop values should be available with the SiPMs. We also have that information in a data base at JLab.
- Production: LEDS have arrived in Geneva; flexiboard delivery is expected for Aug 6
- LED system on Mini BCAL
- FCAL
- Construction Status
- 2011 Hall B FCAL Beam Test (John)
- BCAL
- Activities at JLab (Module positioning, SiPM binning, LG Travellers)
- Cosmics at Regina
- Update on BCAL Beam Tests 2012
- USM update
- SiPM Update (Javiera)
- Working Point Analysis (Orlando)
- Light guides (Iñaki)
- TDR update
- Instructions for the TDR (You must be logged into the wiki to access this page).
- We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
- Calibration of Calorimeters
- Simulations/Reconstruction
- BCAL Simulation Status Update (David)
- Any other business