RC meeting and Run Plan, Friday December 9th

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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

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Shift Schedule

• Link to Schedule

This RC Week

• Next empty shift is a Target Operator DAY shift on Sunday 12/11.

Upcoming RC Week

• There are two (2) other remaining shifts to be filled before winter shutdown; I'm sure Andrew would like them filled asap so he doesn't have to chase down any shift workers.

Accelerator Status

• Everything appears to be running smoothly at the moment.
• Hall C is down for about a week due to a vacuum break.

Current Status

We took data on 3-He during SWING with no huge disruptions.

Møller Measurement

Møller measurement during Friday DAY.

DAQ ISSUES

We should make an effort to document these issues clearly. I don't know if an expert can go back through logs and pull up what was the issue during SWING; that might be helpful.

• I received a phone call from Anu Thursday afternoon that they were having difficulties with the DAQ. This was ~45 minutes worth of time.
  • I instructed Anu to contact Zeke who was also unable to diagnose and remediate the problem.
  • I contacted Alexander who made his way in to the Lab; before he arrived at the Lab the problem resolved itself and the diagnosis remains unclear. [4098814]
• I talked to Nilanga when I came in for the crew switch around 11:45pm and he said that he had a minor problem with the DAQ around 11:15pm. This may be a more routine issue. He noted it in the shift log that Anu began [4098734]

Target Polarization

Target polarization has been good. We look to be at the ~41% value suggested by Gordon prior to the calibration constant change.

• 23:10PM → 41.4% [4098878]
• 17:10PM → 41.0% [4098761]
• 12:40PM → 40.7% [4098661]

Issues remaining

• BB GEM APV unreachable and cannot be repaired at this time.

Short Term Run Plan

• Continue production run on He3 target, 36 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

• I presume that repairs for the BB GEM APV will wait until shutdown.

Special Requests

Please email me ericking (@jlab.org or @temple.edu) if there's something to be added.

• Gordon said that he would like to discuss with the other spokespersons an increase in the current being placed on the target, I informed him to start that discussion and keep me in the loop.

Shutdown Planning

• Arun has agreed that he will begin an email chain with RadCon regarding what materials are safe/unsafe in the hall.

Notices in Effect for Shift Crew

• Power down SBS, BB, and Detector HV before making an access to the Hall

Data Collection Status

• 75 out of 141 days (~53.2%)
• (NEEDS TO BE UPDATED) Total uncorrected accumulated charge on He3: 47.020 C out of 232C (20.26%)
  • 2-Pass: 13.467 C
  • (NEEDS TO BE UPDATED) 3-Pass: 33.553 C (at end of OWL)