Difference between revisions of "October 31, 2023"
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Revision as of 14:01, 31 October 2023
RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting-house meeting room (2nd floor)
- Zoom remote connection information:
Join ZoomGov Meeting https://jlab-org.zoomgov.com/j/1617015555?pwd=L09IQ216dml6ZmM5ODExVjFsMXdsUT09#success Meeting ID: 161 701 5555 Passcode: One tap mobile +16692545252,,1607100885# US (San Jose) +16468287666,,1607100885# US (New York) Dial by your location +1 669 254 5252 US (San Jose) +1 646 828 7666 US (New York) +1 669 216 1590 US (San Jose) +1 551 285 1373 US 833 568 8864 US Toll-free Meeting ID: 160 710 0885 Find your local number: https://jlab-org.zoomgov.com/u/ab2CekLXgQ
Contents
Useful Links
Past 24 hours
Mostly smooth production. Good 24 hours.
Issues:
- Flipping script procedure falling through the crack caused large charge asymmetry for two hours, Hall C RC didn't follow the procedure: https://logbooks.jlab.org/entry/4212928
- Suggestions for the future
- Adding the charge asymmetry to the Hall C alarm handler.
- Making the instruction clear for the future Hall C RC on the half-wave plate change. (This information must be passed on).
- Popcorn alarm: https://logbooks.jlab.org/entry/4212784
- Chiller average temperature: https://logbooks.jlab.org/entry/4212896
- DAQ issue in the morning thanks to Chandan, Raydo, and Wasim for resolving it: https://logbooks.jlab.org/files/2023/10/4212913/nps_hms_coin_2458_50k.pdf
The plan is to data taking till 7:00 am Wednesday.
RC Summary
https://logbooks.jlab.org/entry/4212964
Current Status
Near Future Plan
Wednesday, November 2, during the beam study, the plan is the following:
- 7:00 beam stops. Rotate SHMS to 38 degrees.
- 7:30 a.m.: sweep the hall open for the restricted access.
- Hall will enter restricted access at 8:00-8:15 a.m.,
- No time limit on closing the hall.
- We will attempt the following maintenance items:
- Moving NPS to 6 meters. (from the target). Re-survey for radiation level with Radcon. 6m pin and 9m pin.
- NPS students will remove Column 0: PMTs + bases. Hall tech support is needed for this part.
- Two new bases with the low voltage regulator bypassed (verified) will be swapped into the NPS (column 0).
- NPS shielding installation: large sheets of borated-polyethylene will be transferred from Hall A to C by Hall C tech. (3-4m NPS position), fixed to the rails.
- After installing the shield, reconfirm SHMS angle limit.
- Replace the NPS radiation monitoring dosimeters. (Mitch and others), 8 in column #0, 8 in cloumn #29.
- LED troubleshooting. (Mitch)
- Heidi is looking into adding an additional bandit to ensure SHMS dipole stability.
- Chandan and Dave Mack will access and check the HMS hodoscope patch panel. to address this issue: https://logbooks.jlab.org/entry/4210267
- Aaron will push a new code for the NPS chiller controller.
- Joe will guide a walk-through at 1 p.m.
- Virtual machine reboot request from the computing center (Hanjie is coordinating this part)
- Bob will take another look at the scaler server.
- Simona will place some test samples into the Hall (not NPS-related).
- Paolo for additional lead shielding, we need the holder. (expected to come in today in the afternoon).
In the near term future:
- Sometime in the future, we will invite Vald to give an insight into the high radiation test results.
- We will perform a corrector coil beam steering test for the next angle setting with a non-zero corrector coil field.
Special Studies
- Peter found HMS Central Momentum mismatch/Correction: https://logbooks.jlab.org/entry/4210756
