[Lad_hallc] [New Logentry] RC Report 24 May 2025

[schmidta at jlab.org]

Logentry Text:
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Yesterday, work was conducted to get the hall up and running again to prepare for the resumption of beam. The target was re-liquified, the spectrometer magnets were tested. HMS Q2 was ramped up and left on overnight to avoid any trouble today. We resumed flowing gas through the spectrometer DCs and through the GEMs. We swept the hall at 15:30 and went to Controlled. 

The one hiccup was the A Can vacuum, which was not good enough to restart the cryopumps. A roughing pump was left running overnight, and fortunately by this morning, the vacuum was back down where it needed to be. (See https://logbooks.jlab.org/entry/4382463). We moved to beam permit and beam tuning began a little after 8:30 this morning. In parallel, spectrometer magnets have been ramped up and detectors re-energized. The goal is still to resume data taking later today.


SHIFT SUMMARIES:

Saturday day shift: https://logbooks.jlab.org/entry/4382511

RUN PLAN:

We are in the process of restoring beam to the hall. Once we have completed the restoration procedure, the plan is to take a few hours with carbon multifoil at 1 uA for calibration, and then continue production with D2 (300 nA), with single arm measurements once per day.

NOTES FOR SHIFT TAKERS:

None at the moment.

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We will have our regular RC meeting today at 2:30. I will be in person at the CH conference room, but feel free to join remotely. 

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


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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/4382564
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