[Lad_hallc] [New Logentry] RC Report 28 May 2025

[schmidta at jlab.org]

Logentry Text:
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Yesterday, we had an access in the morning to repair the GEMs and diagnose the DAQ problem in which the GEMs were missing triggers. The latter work did not turn up any smoking guns, so remain hopeful that with the GEM fully repaired, the DAQ will behave. Once the access was complete, we were able to resume data taking, and there were no DAQ problems during the small window we had to take more data.

During our access, Facilities took the opportunity to inspect their work on the electrical conduits from last week. Sure enough, they found more water infiltration, and so the decision was made to once again power down the Hall. The magnets were ramped down, the detectors were put into a parked state, and the target was warmed up. Facilities will try to solve the problem by cutting and capping the offending conduit(s). At today's MCC meeting, Facilities said the earliest that power might be restored to the Hall would be Friday morning. All Wednesday shifts were cancelled, and expect further cancellations of shifts on Thursday. 

Today is my last day as RC. I had the instruments of power next to Holly Szumila-Vance.


SHIFT SUMMARIES:
DAY -> https://logbooks.jlab.org/entry/4384524
SWING -> cancelled
OWL -> cancelled


RUN PLAN:
Once we are able to run again, we still want to take 2 hours of optics running with the GEMs working.

NOTES FOR SHIFT TAKERS:
Shift workers should subscribe to hallc_running at jlab.org to receive announcements about shift cancellations. This will obviate the need to call the RC in the night to check if your shifts are cancelled.

Shift workers are reminded to enter runs on the google sheet.

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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_28,_2025

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RUN LIST
22801 - Production (no GEMs) - 0.2M events
22811 - Production - 2.5M events
22812 - Optics (1uA) - 1.2M 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/4385287
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