[Hallc_running] [Revised Logentry] RC Daily Update Oct/28/2023, and RC meeting tomorrow at 11 am

[billlee at jlab.org]

Logentry Text:
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In the past 24 hours, we completed the Moller measurement at 14:30 (1.5 hours ahead of the schedule) and resumed the data production at kinematics KinC_x36_5. The spokespersons agreed to change the NPS spectrometer to a slightly different angle for the remaining cycles of kinematic KinC_x36_5, (30.69 deg in the standard configuration it was at 28.417 deg), at this nonstandard setting the corrector coils can be turned off. Thanks to MCC, we verified that this was the case and continued with the production. 

Overnight was a smooth production. We collected 1 complete cycle plus  LD2 + LH2 data of the 2nd cycle (we have enough dummy and DAQ calibration data to support the analysis). 

As planned at 9:30 a.m. today, we started to change to the new setting: KinC_x50_4. Current setting theta_HMS -5.253 GeV, SHMS_angle =31.747 deg, and the HMS angle = 16.917. 

11:00-14:40 a.m., we had a DAQ-related issue, many thanks to (Wassim, Chandan, Bob, and others) for finally fixing these issues. see details here: https://logbooks.jlab.org/entry/4210759 , There was also a SHMS sensor clitch that caused an overflow, Heidi was very fast to remotely resolve the issue: https://logbooks.jlab.org/entry/4210989

To track where we are on the production, see the attached day-by-day, beam usage yesterday was 35% and 500mC of data was collected. (I really thought we did better). Also, further modules have failed, see the most updated energy integral in the attachment. 

Looking ahead, 
1. We will likely postpone the Monday corrector coil beam steering test, to the next setting change, since the current setting doesn't require the corrector coil.

2. Wednesday, November 2, 7:30 a.m.: sweep the hall open for maintenance first thing in the morning.
We will attempt the following maintenance items:
a. NPS students remove/replace damaged PMT/base.
b. NPS shielding installation if ready
c. Ellen and Heidi for Cryo component check?
d. Chandan (and Dave Mac) checking/maintaining HMS hodoscope. to address this issue: https://logbooks.jlab.org/entry/4210267
e. Do the DAQ experts need to do something?
I am sure the maintenance list will grow as we get closer to Wednesday.

3. Tuesday, November 3, 11:00 a.m.:
We will invite Vald to give an insight into the high radiation test results. 

There will be a meeting tomorrow to discuss a few remaining questions and decisions:
1. Adjust the triggers/running condition at the current setting.
2. Final decision on Monday corrector coil steering study.
3. Maintenance day planning.
4. Potential report from Vlad on the radiation damage study.
  

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4211111
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