[Lad_hallc] [New Logentry] RC Report 27 May 2025

[schmidta at jlab.org]

Logentry Text:
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We had smooth production running yesterday and overnight, albeit with no GEMs. The accelerator is running smoothly, and so there is a possibility that RF recovery is skipped on Wednesday, in which case we want to take advantage and keep taking good production data. 
One minor item to mention: the hall probes on HMS Q2 and Q3 seem to be reading faulty values. (https://logbooks.jlab.org/entry/4384145)

The big item for the day is GEM repair. We are about to start an access to
  - Fix the broken HV trace on the far GEM
  - Diagnose and repair the problem that led to the GEMs missing triggers.
We will discuss the outcome of this access at the RC meeting today at 14:30.

If we succeed in bringing the GEMs back, we'll plan to finally complete our optics calibration, before resuming production running (300 nA on deuterium).

We still have a vacant few owl shifts in the next few days. If you can help out, it would be greatly appreciated.


SHIFT SUMMARIES:
DAY -> https://logbooks.jlab.org/entry/4383928
SWING -> https://logbooks.jlab.org/entry/4384136
OWL -> https://logbooks.jlab.org/entry/4384322


RUN PLAN:
We will continue production with D2, with single arm measurements once per day. Until we can do work to improve the GEMs, they will remain out of the trigger.

NOTES FOR SHIFT TAKERS:
Don't forget to enter runs on the run list google sheet.
Until GEMs are fixed, shift crews should be running with Production_noGEM

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We will have our regular RC meeting today at 2:30, in the CH conference room, and on zoom.

Online information here -> https://logbooks.jlab.org/entry/4346862

More information will be filled on the wiki:

https://hallcweb.jlab.org/wiki/index.php?title=May_27,_2025

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RUN LIST
22776 - Production (no GEMs) - 3.9M events
22777 - Production (no GEMs) - 2.8M events
22778 - Production (no GEMs) - 3.3M events
22779 - Production (no GEMs) - 3.6M events
22781 - Production (no GEMs) - 1.0M events
22782 - Production (no GEMs) - 0.8M events
22783 - Production (no GEMs) - 3.6M events
22784 - Production (no GEMs) - 3.6M events
22785 - Production (no GEMs) - 1.5M events
22786 - Production (no GEMs) - 3.8M events
22787 - Production (no GEMs) - 3.4M events
22788 - Production (no GEMs) - 3.7M events
22789 - Production (no GEMs) - 3.6M events
22790 - Production (no GEMs) - 3.7M events
22791 - Production (no GEMs) - 3.8M events
22792 - Production (no GEMs) - 2.3M events
22793 - Production (no GEMs) - 3.4M events
22794 - Production (no GEMs) - 3.7M events
22795 - Production (no GEMs) - 3.3M events
22796 - Production (no GEMs) - 3.8M events
22797 - Production (no GEMs) - 3.8M events
22798 - Production (no GEMs) - 3.3M events
22799 - Production (no GEMs) - 3.9M events
22800 - Production (no GEMs) - 5.0M events


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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/4384548
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