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<article id="node-1457608" class="node node-logentry article ia-n clearfix" role="article">
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<a href="https://logbooks.jlab.org/entry/4384548" rel="bookmark">RC Report 27 May 2025</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4384548" class="lognumber" data-lognumber="4384548">4384548</a>. Submitted by <a href="https://logbooks.jlab.org/user/schmidta">schmidta</a> on <time datetime="2025-05-27T08:36:01-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1748345761&end_date=1748352961&book=HCLOG">Tue, 05/27/2025 - 08:36</a></time>. </p>
<table class="field-vitals">
<tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr>
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<p>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.<br />
One minor item to mention: the hall probes on HMS Q2 and Q3 seem to be reading faulty values. (<a href="https://logbooks.jlab.org/entry/4384145">https://logbooks.jlab.org/entry/4384145</a>)</p>
<p>The big item for the day is GEM repair. We are about to start an access to<br />
- Fix the broken HV trace on the far GEM<br />
- Diagnose and repair the problem that led to the GEMs missing triggers.<br />
We will discuss the outcome of this access at the RC meeting today at 14:30.</p>
<p>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).</p>
<p>We still have a vacant few owl shifts in the next few days. If you can help out, it would be greatly appreciated.</p>
<p>SHIFT SUMMARIES:<br />
DAY -> <a href="https://logbooks.jlab.org/entry/4383928">https://logbooks.jlab.org/entry/4383928</a><br />
SWING -> <a href="https://logbooks.jlab.org/entry/4384136">https://logbooks.jlab.org/entry/4384136</a><br />
OWL -> <a href="https://logbooks.jlab.org/entry/4384322">https://logbooks.jlab.org/entry/4384322</a></p>
<p>RUN PLAN:<br />
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.</p>
<p>NOTES FOR SHIFT TAKERS:<br />
Don't forget to enter runs on the run list google sheet.<br />
Until GEMs are fixed, shift crews should be running with Production_noGEM</p>
<p>-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-<br />
We will have our regular RC meeting today at 2:30, in the CH conference room, and on zoom.</p>
<p>Online information here -> <a href="https://logbooks.jlab.org/entry/4346862">https://logbooks.jlab.org/entry/4346862</a></p>
<p>More information will be filled on the wiki:</p>
<p><a href="https://hallcweb.jlab.org/wiki/index.php?title=May_27,_2025">https://hallcweb.jlab.org/wiki/index.php?title=May_27,_2025</a></p>
<p>-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-</p>
<p>RUN LIST<br />
22776 - Production (no GEMs) - 3.9M events<br />
22777 - Production (no GEMs) - 2.8M events<br />
22778 - Production (no GEMs) - 3.3M events<br />
22779 - Production (no GEMs) - 3.6M events<br />
22781 - Production (no GEMs) - 1.0M events<br />
22782 - Production (no GEMs) - 0.8M events<br />
22783 - Production (no GEMs) - 3.6M events<br />
22784 - Production (no GEMs) - 3.6M events<br />
22785 - Production (no GEMs) - 1.5M events<br />
22786 - Production (no GEMs) - 3.8M events<br />
22787 - Production (no GEMs) - 3.4M events<br />
22788 - Production (no GEMs) - 3.7M events<br />
22789 - Production (no GEMs) - 3.6M events<br />
22790 - Production (no GEMs) - 3.7M events<br />
22791 - Production (no GEMs) - 3.8M events<br />
22792 - Production (no GEMs) - 2.3M events<br />
22793 - Production (no GEMs) - 3.4M events<br />
22794 - Production (no GEMs) - 3.7M events<br />
22795 - Production (no GEMs) - 3.3M events<br />
22796 - Production (no GEMs) - 3.8M events<br />
22797 - Production (no GEMs) - 3.8M events<br />
22798 - Production (no GEMs) - 3.3M events<br />
22799 - Production (no GEMs) - 3.9M events<br />
22800 - Production (no GEMs) - 5.0M events</p>
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