RC meeting and Run Plan, Monday December 12th
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Contents
RC Meeting Information
| Current RC: | Eric King [ericking (@jlab.org or @temple.edu)] | |
| Time: | Daily at 3:30PM | |
| Location: | Counting House Conference Room |
Remote Connection Details
- Join ZoomGov Meeting
- https://jlab-org.zoomgov.com/j/1619032184?pwd=aWhTVWxya1ZZQzA1K2ZPSTd2ZX...
- Meeting ID: 161 903 2184
- Passcode: 260715
- Dial by your location
- +1 669 254 5252 US (San Jose)
- +1 646 828 7666 US (New York)
- +1 551 285 1373 US
- +1 669 216 1590 US (San Jose)
- 833 568 8864 US Toll-free
- Find your local number: https://jlab-org.zoomgov.com/u/acj3pTicMx
Shift Schedule
Until Shutdown
All shifts are full! :)
Accelerator Status
- Accelerator was down at the end of SWING for 45 minutes. [DT Event ID: 17472]
- Hall C valve/vacuum repair is complete; they're coming back online Tuesday; they will be priority hall next week.
Current Status
Taking production data on 3-He
Shift Summaries
Things That Happened
- HH Hodoscope voltages dropped on Sunday OWL (IDK, if this is wholly unusual). 4099867
- Scalar helicity histogram from run 3191 50K Replay showed all zeros. 4099876
- This was about 30 minutes of lost data.
- I only found one HALOG post while talking to SL, advised SL to start new run when accelerator returned beam and verify helicity data correct.
- SL should make reviewing 50K plots high priority.
Beam Current
We've been happily running at 40uA.
- (Saturday) I asked Sebastian to make a record of the ramp rates over the course of the past 8 hours during Saturday SWING and he went an extra step. 4099752
- (Sunday) Bill has taken this further and created a strip chart that tracks this continually that seems to work very nicely. 4099956
- Perhaps ask the Shift Leader to screenshot once per shift or add it to Target operator plots to be posted during shift.
Target
Target polarization has been stable. List of the recent polarizations
- SUN 08:34 → 40.3% 4100316
- MON 04:34 → 40.9% 4100229
- MON 00:41 → 41.0% 4100152
- SUN 20:38 → 40.8% 4100093
- SUN 17:31 → 41.3% 4100050
- SUN 14:04 → 41.6% 4099992
Target Operator issues:
- (Monday) UVa fiber trip... no alarm??? 4100334
- (Sunday) Bill noticed that the wrong laser software was running on polhe1; he corrected the issue. 4100010
- Junhao has complained that the Windows target VNC screen keeps locking, this is a nuisance. 4100065
- Manju has also complained that this is a nuisance.
Issues Resolved
- Bill Henry has resolved the communication issue regarding the Moller HH magnet. Thank you, Bill. 4099942
- Bill spoke with Zeke about GEM RED alarm panel items about this and they agreed to bring the topic up in Monday's RC Meeting.
Issues remaining
- BB GEM APV unreachable and cannot be repaired at this time.
Short Term Run Plan
- Continue production run on He3 target, 40 uA
- Use GEnII-noSBSGEMs DAQ config
- Use ps3=0, ps5=6, others =-1
- BBCal threshold at -366 mV, HCal threshold at -19 mV
- NMR measurement every 3 - 4 hours, close to 4 hours is better
Planned Accesses to the Hall
None
Special Requests
Please email me ericking (@jlab.org or @temple.edu) if there's something to be added.
Notices in Effect for Shift Crew
- Power down SBS, BB, and Detector HV before making an access to the Hall
Data Collection Status
Collected 8.994 C of charge over the weekend (33.553 prior to RC Meet on Friday)
- 77 out of 141 days (~54.6%)
- Total uncorrected accumulated charge on He3: 56.014 C out of 232C (24.14%)
- 2-Pass: 13.467 C
- 3-Pass: 42.547 C (Monday at NOON)
