[Halla_running] [New Logentry] RC daily update Oct 20 2023

[jcaylor at jlab.org]

Logentry Text:
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RC daily update 10/20
Yesterday morning the techs made an escorted access to insert the sieve around 8:30 am for optics data. We waited until about 1:30 pm for the machine to recover from a south linac access. Because the single carbon foil is very close to the He3 cell edge we first checked beam placement with the carbon hole and then took about an hour of optics data with the single carbon foil and magnets off. The techs went back into the hall to remove the sieve at the end of day shift. 

After getting back into beam permit we followed the beam checkup procedure to verify the position of the beam before moving to production data. Production data taking was started around 5 pm with a cell polarization of ~50% without beam and it looks to be about 47% in beam. There was an issue noted with the HCal TDC (ADC looks fine) noted in the production data. It was not clear at that time if it was a hardware or software issue and it was decided to wait until morning for an access while checking software overnight. After investigation seems like the issue was the distribution board. Alex and Jiwan made an escorted access to check it out. There was a issue with the distribution board clock so it was replaced with a new board. 

Run Plan: Continue production running when beam is available. 

Running Schedule: GEn was given another week extension and as of now will continue through Tuesday 10/31. A_LL is pushed back a week but run time does not change.

Shifts: There is a trade request for the TO on Day shift tomorrow (10/21)
__________________________________________________________________________
We will have the regular RC meeting at 3:30pm in the Counting House conference room.
Alternately, people can join remotely via:
https://jlab-org.zoomgov.com/j/1616220064
Meeting ID: 161 622 0064
Passcode: 314159


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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/4203693
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