Difference between revisions of "Wednesday, October 4, 2017"
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## [https://hallcweb.jlab.org/DocDB/0008/000896/001/Presentation.pdf Heavy Gas Cerenkov Update] - Ryan | ## [https://hallcweb.jlab.org/DocDB/0008/000896/001/Presentation.pdf Heavy Gas Cerenkov Update] - Ryan | ||
## [https://hallcweb.jlab.org/DocDB/0008/000895/001/GEM_Update_Oct2017.pdf GEM Update] - Latif | ## [https://hallcweb.jlab.org/DocDB/0008/000895/001/GEM_Update_Oct2017.pdf GEM Update] - Latif | ||
| − | ## SHMS Quartz Plane Update - Simona | + | ## [https://hallcweb.jlab.org/DocDB/0008/000898/001/shms_quartz.pdf SHMS Quartz Plane Update] - Simona |
## [https://hallcweb.jlab.org/DocDB/0008/000897/001/HMS_SHMS.pdf HMS 12 GeV Chamber Update] - Bishnu | ## [https://hallcweb.jlab.org/DocDB/0008/000897/001/HMS_SHMS.pdf HMS 12 GeV Chamber Update] - Bishnu | ||
# Review systems owners and update information | # Review systems owners and update information | ||
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=== General === | === General === | ||
| − | + | * Eric updated the [https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#Fall_2017.2FSpring_2018_Commissioning_Run detector readiness tables] and added a [https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#DAQ.2FTrigger DAQ/TRIGGER portion] | |
| − | + | * Spokespeople for the upcoming experiments are urged to look at the listed triggers and contact Brad or Eric if they require any further trigger configurations | |
| − | + | * Detector groups were also urged to update the [https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#Hall_C_Detectors_and_System_Owners individual detector pages] as well the [https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#Fall_2017.2FSpring_2018_Commissioning_Run readiness table] so that it is clearly understood what still needs to be done prior to running in December | |
| − | + | * Eric advertised the new [https://hallcweb.jlab.org/wiki/index.php/Online/Offline_Monitoring_Working_Group_Meetings hallc online/offline monitoring working group meetings] | |
| − | + | * Spokespeople for the upcoming runs are urged to present their needs for monitoring and replays at these meetings | |
| − | + | * The meetings will one held weekly on Tuesdays at 11 AM | |
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=== HMS === | === HMS === | ||
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==== 12 GeV Drift Chambers ==== | ==== 12 GeV Drift Chambers ==== | ||
| − | + | * Bishnu showed [https://hallcweb.jlab.org/DocDB/0008/000897/001/HMS_SHMS.pdf some slides] | |
| − | + | * It was previously reported that there was many issues with the chambers | |
| − | + | * The chambers were moved to the TED highbay clean room and many issues were identified | |
| − | + | * Chamber 1 was opened, cleaned, and repaired | |
| − | + | * After HV was applied the chamber 1 it was still pulling 30 uA at 1850V with Ar:CO2 | |
| − | + | * Chamber 2 was moved into hall-C and now chamber is drawing 110 nA at 2100V with Ar:Ethane | |
| − | + | * Future plans are connect chamber 2 to DAQ in the hall to measure the plateau curve and perform threshold studies | |
| − | + | * The outlook for the chambers is good | |
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| − | |||
| − | |||
| − | |||
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=== SHMS === | === SHMS === | ||
| Line 72: | Line 51: | ||
==== GEM ==== | ==== GEM ==== | ||
| − | + | * Latif showed [https://hallcweb.jlab.org/DocDB/0008/000895/001/GEM_Update_Oct2017.pdf some slides] | |
| − | + | * The HV issues have been resolved and the GEM is back online | |
| − | + | * The misunderstanding of the latency is now understood | |
| − | + | * They have successfully performed latency scans in a robust manner | |
| − | + | * A standalone trigger with the production 3/4 trigger has been implemented | |
| − | + | * The latencies were directly measured on the scope and then translated to the CRL configuration | |
| − | + | * The latencies are clearly understood now | |
| − | + | * The TI firmware in ROC12 has been updated in conjunction with the rest of the SHMS ROC’s | |
| − | + | * The latency between the two firmware versions do not modify the delay between the L1A and the pre-trigger as expected | |
| + | * The GEM group are going to steal the DAQ afternoon/tonight for a cosmic run | ||
| + | * No other triggers will be configured in this run for these integrated DAQ tests | ||
==== Hodoscopes ==== | ==== Hodoscopes ==== | ||
| − | + | * Simona Showed [https://hallcweb.jlab.org/DocDB/0008/000898/001/shms_quartz.pdf some slides] | |
| + | * The new PMTs were delivered September 26, 2017 (2 months late) | ||
| + | * The PMTs have met spec despite catalog inflation | ||
| + | * Previous cookie thickness was measured to be 500 um to 1 mm despite goal of < 200 um | ||
| + | * On. Average the cookie thickness are now < 50 um | ||
| + | * The manufacturing details of the cookie manufacturing, PMT coupling, and assembly processes were shown | ||
| + | * They can now reliably make cookies and assemble quartz bars | ||
| + | * 12 bars anticipated to be ready by 3rd week of October and should be done with 16 by the middle of November | ||
| + | * Carl Zorn performed QE studies for all 32 PMTs, they match what what ET reported | ||
| + | * Simona performed gain measurements on the scope, they match with Carl’s who utilized a DAQ | ||
| + | * The cosmic test stand is sitting on the Hall-C floor | ||
| + | * It currently forms 5 space points with 4 fold coincidences to select perpendicular cosmic tracks through the quartz bars | ||
| + | * Pedestals were annoyingly narrow! | ||
| + | * 3 weeks should be available for testing | ||
| + | * The plane needs to be back in the stack prior to Nov 20 | ||
==== Heavy Gas Cherenkov ==== | ==== Heavy Gas Cherenkov ==== | ||
| − | + | * Ryan showed [https://hallcweb.jlab.org/DocDB/0008/000896/001/Presentation.pdf some slides] | |
| − | + | * [https://hallcweb.jlab.org/DocDB/0008/000893/001/HGC_Calibration.pdf Documentation] has been added to the DocDB and a [https://github.com/JeffersonLab/hallc_replay/blob/master/CALIBRATION/shms_hgcer_calib/README.md README] in the CALIBRATION directory in hallc_replay | |
| − | + | * New ability to update calibration constants | |
| − | + | * Updated pion efficiency for pion:electron ratio | |
| − | + | * Simulations are ongoing to better understand the loss of PE’s observed during the KPP run | |
| − | + | * The studies are ongoing | |
| − | |||
Latest revision as of 10:21, 5 October 2017
Meeting Information
- Location CC L210A, 11 am
- DocDB
Blue Jeans Connection Information
- https://bluejeans.com/895800575
- Just want to dial in on your phone?
- +1.408.740.7256 (US)
- +1.888.240.2560 (US Toll Free)
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- Enter Meeting ID: 895800575
- Press #
Agenda
- Commissioning plan updates from detector systems
- Status update from detector owners, calibrations, efficiencies, etc.
- Heavy Gas Cerenkov Update - Ryan
- GEM Update - Latif
- SHMS Quartz Plane Update - Simona
- HMS 12 GeV Chamber Update - Bishnu
- Review systems owners and update information
- Address system specific points of interest for the Fall 2017 run
Minutes
General
- Eric updated the detector readiness tables and added a DAQ/TRIGGER portion
- Spokespeople for the upcoming experiments are urged to look at the listed triggers and contact Brad or Eric if they require any further trigger configurations
- Detector groups were also urged to update the individual detector pages as well the readiness table so that it is clearly understood what still needs to be done prior to running in December
- Eric advertised the new hallc online/offline monitoring working group meetings
- Spokespeople for the upcoming runs are urged to present their needs for monitoring and replays at these meetings
- The meetings will one held weekly on Tuesdays at 11 AM
HMS
12 GeV Drift Chambers
- Bishnu showed some slides
- It was previously reported that there was many issues with the chambers
- The chambers were moved to the TED highbay clean room and many issues were identified
- Chamber 1 was opened, cleaned, and repaired
- After HV was applied the chamber 1 it was still pulling 30 uA at 1850V with Ar:CO2
- Chamber 2 was moved into hall-C and now chamber is drawing 110 nA at 2100V with Ar:Ethane
- Future plans are connect chamber 2 to DAQ in the hall to measure the plateau curve and perform threshold studies
- The outlook for the chambers is good
SHMS
GEM
- Latif showed some slides
- The HV issues have been resolved and the GEM is back online
- The misunderstanding of the latency is now understood
- They have successfully performed latency scans in a robust manner
- A standalone trigger with the production 3/4 trigger has been implemented
- The latencies were directly measured on the scope and then translated to the CRL configuration
- The latencies are clearly understood now
- The TI firmware in ROC12 has been updated in conjunction with the rest of the SHMS ROC’s
- The latency between the two firmware versions do not modify the delay between the L1A and the pre-trigger as expected
- The GEM group are going to steal the DAQ afternoon/tonight for a cosmic run
- No other triggers will be configured in this run for these integrated DAQ tests
Hodoscopes
- Simona Showed some slides
- The new PMTs were delivered September 26, 2017 (2 months late)
- The PMTs have met spec despite catalog inflation
- Previous cookie thickness was measured to be 500 um to 1 mm despite goal of < 200 um
- On. Average the cookie thickness are now < 50 um
- The manufacturing details of the cookie manufacturing, PMT coupling, and assembly processes were shown
- They can now reliably make cookies and assemble quartz bars
- 12 bars anticipated to be ready by 3rd week of October and should be done with 16 by the middle of November
- Carl Zorn performed QE studies for all 32 PMTs, they match what what ET reported
- Simona performed gain measurements on the scope, they match with Carl’s who utilized a DAQ
- The cosmic test stand is sitting on the Hall-C floor
- It currently forms 5 space points with 4 fold coincidences to select perpendicular cosmic tracks through the quartz bars
- Pedestals were annoyingly narrow!
- 3 weeks should be available for testing
- The plane needs to be back in the stack prior to Nov 20
Heavy Gas Cherenkov
- Ryan showed some slides
- Documentation has been added to the DocDB and a README in the CALIBRATION directory in hallc_replay
- New ability to update calibration constants
- Updated pion efficiency for pion:electron ratio
- Simulations are ongoing to better understand the loss of PE’s observed during the KPP run
- The studies are ongoing
