Difference between revisions of "Wednesday, June 28, 2017"
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# Address system specific points of interest for the Fall 2017 run | # Address system specific points of interest for the Fall 2017 run | ||
# [https://hallcweb.jlab.org/doc-public/ShowDocument?docid=859 Hall C Background Helium] | # [https://hallcweb.jlab.org/doc-public/ShowDocument?docid=859 Hall C Background Helium] | ||
| + | # [https://hallcweb.jlab.org/doc-public/ShowDocument?docid=876 Plans for SHMS Magnet Nonlinearity Studies Starting With Q1] | ||
== Minutes == | == Minutes == | ||
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=== General === | === General === | ||
| − | + | * Mark updated a [https://hallcweb.jlab.org/wiki/index.php/Detector_Working_Group_Meetings#Summer_preparation_work list of summer tasks] which need to be completed prior to the Fall 2017 run | |
| − | + | ** Update the wiki page, or email Mark, if anything needs to be added or modified | |
| − | + | * Sam showed [https://hallcweb.jlab.org/DocDB/0008/000859/002/Hall%20C%20He%20slidesDaveEditedv2.pdf some slides] regarding the helium levels in Hall-C | |
| − | + | ** There is an average of 150 ppm of He in Hall-C while there is none in Hall-A | |
| − | + | ** The helium mixing in Hall-C was modeled with various models which indicates that in its butternut state the Hall is a very poor environment for PMT's | |
| − | + | ** It is clear there are substantial helium leaks in the hall | |
| − | + | * Dave showed [https://hallcweb.jlab.org/DocDB/0008/000876/002/SHMS%20magnet%20studiesv6.pdf some slides] regarding the SHMS magnet tune reproducibility | |
| − | + | ** He has compiled a To-Do list for summer to complete with Sam | |
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=== SHMS === | === SHMS === | ||
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==== Heavy Gas Cherenkov ==== | ==== Heavy Gas Cherenkov ==== | ||
| − | + | * Ryan showed [https://hallcweb.jlab.org/DocDB/0008/000870/001/Detector_Visualization.pdf some slides] regarding the HGC NPE spectra | |
| − | + | ** The HGC is performing below expected in regards to light collection | |
| − | + | ** The NPE spectra are systematically smaller than expected than what is observed in simulation | |
| − | + | ** Double bands present in the NPE vs. track intersection at the mirror planes indicate some misunderstandings, | |
| − | + | *** The suggestion moving forward is that the z-axis needs to filled with the average of NPE instead of the raw sum | |
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Latest revision as of 14:49, 28 June 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)
- +1.408.317.9253 (Alternate number)
- http://bluejeans.com/numbers
- Enter Meeting ID: 895800575
- Press #
Agenda
- Survey of HMS and SHMS spectrometers. Presently doing surveys to set the angle plates for the SHMS. Do we need surveys for the HMS plates?
- Commissioning plan updates from detector systems
- Status update from detector owners, calibrations, efficiencies, etc.
- Calibration of the HGC
- Review systems owners and update information
- Address system specific points of interest for the Fall 2017 run
- Hall C Background Helium
- Plans for SHMS Magnet Nonlinearity Studies Starting With Q1
Minutes
General
- Mark updated a list of summer tasks which need to be completed prior to the Fall 2017 run
- Update the wiki page, or email Mark, if anything needs to be added or modified
- Sam showed some slides regarding the helium levels in Hall-C
- There is an average of 150 ppm of He in Hall-C while there is none in Hall-A
- The helium mixing in Hall-C was modeled with various models which indicates that in its butternut state the Hall is a very poor environment for PMT's
- It is clear there are substantial helium leaks in the hall
- Dave showed some slides regarding the SHMS magnet tune reproducibility
- He has compiled a To-Do list for summer to complete with Sam
SHMS
Heavy Gas Cherenkov
- Ryan showed some slides regarding the HGC NPE spectra
- The HGC is performing below expected in regards to light collection
- The NPE spectra are systematically smaller than expected than what is observed in simulation
- Double bands present in the NPE vs. track intersection at the mirror planes indicate some misunderstandings,
- The suggestion moving forward is that the z-axis needs to filled with the average of NPE instead of the raw sum
