Difference between revisions of "October 31, 2023"

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(Created page with "[https://hallcweb.jlab.org/wiki/index.php/RC_Daily_Meetings:_NPS Back to the previous page] <b> RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting-hou...")
 
m (Clarified the RC instructions link for the HWP (this will be copy pasted for each new meeting so wanted to clarify it))
 
(16 intermediate revisions by one other user not shown)
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* [https://logbooks.jlab.org/book/hallc Hall-C Logbook]
 
* [https://logbooks.jlab.org/book/hallc Hall-C Logbook]
 
* [https://cebaf.jlab.org/files/ops/accboard/ MCC White Board]
 
* [https://cebaf.jlab.org/files/ops/accboard/ MCC White Board]
 +
 +
= Instruction for RCs =
 +
* [https://hallcweb.jlab.org/wiki/index.php/Hall_C_IHWP_Change_Procedure Half-wave plate change]
 +
** Follow the instructions in the link above whenever the HWP is changed flipped.
 +
  
 
= Past 24 hours =
 
= 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 =
 
= RC Summary =
−
 
+
https://logbooks.jlab.org/entry/4212964
  
 
= Current Status =
 
= Current Status =
Line 38: Line 54:
  
 
= Near Future Plan =  
 
= 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.
 
# We will perform a corrector coil beam steering test for the next angle setting with a non-zero corrector coil field.
−
# Wednesday, November 2, during the beam study, 7:00 beam stops, 7:30 a.m.: sweep the hall open for maintenance; Hall will enter restricted access at 8:00-8:15 a.m, and sweep close the hall at 16:00.
 
−
We will attempt the following maintenance items:
 
−
## NPS students will remove all PMTs + bases from column. Hall tech support is needed for this part.
 
−
## Two new bases with the low voltage regulator bypassed (verified) with be swapped into the NPS.
 
−
## NPS shielding installation if ready
 
−
## Heidi is looking into adding an additional bandit to ensure SHMS dipole stability.
 
−
## Chandan and Dave Mac will access and check the HMS hodoscope patch panel. to address this issue: https://logbooks.jlab.org/entry/4210267
 
−
## Aaron will push new code for the NPS chiller controller.
 
−
# Wednesday, Nov 1, 11:00 a.m.: We will invite Vald to give an insight into the high radiation test results.
 
−
I am sure the maintenance list will grow as we get closer to Wednesday.
 
  
 
= Special Studies =
 
= Special Studies =
Line 56: Line 87:
  
 
= Planned Accelerator Configuration Changes =
 
= Planned Accelerator Configuration Changes =
−
* Pass change in Hall A on the 31st
 
  
 
= Special Requests =
 
= Special Requests =

Latest revision as of 15:25, 31 October 2023

Back to the previous page

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

Useful Links

Instruction for RCs


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
  1. Adding the charge asymmetry to the Hall C alarm handler.
  2. Making the instruction clear for the future Hall C RC on the half-wave plate change. (This information must be passed on).

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:

  1. Sometime in the future, we will invite Vald to give an insight into the high radiation test results.
  2. We will perform a corrector coil beam steering test for the next angle setting with a non-zero corrector coil field.

Special Studies

Planned Accesses to the Hall Today

Planned Accelerator Configuration Changes

Special Requests

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