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</style><article id="node-1138037" class="node node-logentry contextual-links-region article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/4065001" rel="bookmark">RC summary Oct 20, 2022</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4065001/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4065001/delete?destination=email/send">Delete</a></li></ul></div>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4065001" class="lognumber" data-lognumber="4065001">4065001</a>. Submitted by <a href="https://logbooks.jlab.org/user/shujie">shujie</a> on <time datetime="2022-10-21T09:25:59-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1666355159&end_date=1666362359&book=HCLOG">Fri, 10/21/2022 - 09:25</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr></table></div>
<div class="logentry node-content">
<p>(We need more shift workers for this weekend and next week!)</p>
<p>Day starts with smoothly data taking. Beam was trippy now and then.<br />
HMS Q3 and dipole tripped after Hall B solenoid trip around 14:40. Took about one hour to recover. <a href="https://logbooks.jlab.org/entry/4064249">https://logbooks.jlab.org/entry/4064249</a>. MCC was performing LEM/injector restoration at that time so not much real beam time lost.<br />
During Swing and Owl shift we got beam authorization to run 70uA (thanks Doug for coordinating!) for BCM calibration. Around 7pm we completed data taking at setting 1 (finally) and started BCM calibration. Finished around 8pm and continue data taking with super stable beam. Beam quality during Owl shift dropped as other halls came online. MCC adjusted our current ramp up rate to 1uA/sec. <a href="https://logbooks.jlab.org/entry/4064903">https://logbooks.jlab.org/entry/4064903</a>. RF group will meet to discuss the beam stability issue.<br />
Now we have 45uA stable beam with Titanium target, about 1/3 of the way into our setting 2. No planned configuration change or hall access.</p>
<p>Notes:</p>
<p>BCM calibration: <a href="https://logbooks.jlab.org/entry/4064522">https://logbooks.jlab.org/entry/4064522</a><br />
and we observed a correlation b/w energy drift and beam current (Hall A was off) <a href="https://logbooks.jlab.org/entry/4064491">https://logbooks.jlab.org/entry/4064491</a></p>
<p>Brad switched the gas shed heat pump to "warm" <a href="https://logbooks.jlab.org/entry/4064368">https://logbooks.jlab.org/entry/4064368</a></p>
<p>Two alarms are added to monitor SHMS Q2 vacuum while the vacuum gauge will be installed in the next maintenance day (thanks to Steve and Casey). <a href="https://logbooks.jlab.org/entry/4064546">https://logbooks.jlab.org/entry/4064546</a> <a href="https://logbooks.jlab.org/entry/4064936">https://logbooks.jlab.org/entry/4064936</a> </p>
<p>SHMS HB vacuum <a href="https://logbooks.jlab.org/entry/4064884">https://logbooks.jlab.org/entry/4064884</a> and SHMS dipole LN2 level <a href="https://logbooks.jlab.org/entry/4064490">https://logbooks.jlab.org/entry/4064490</a>. <a href="https://logbooks.jlab.org/entry/4064528">https://logbooks.jlab.org/entry/4064528</a> are red on magnet GUI. Those are know issues and monitored by Heidi. The latter could be addressed during next hall access.</p>
<p>SHMS aerogel HV off and 50ohm termination was removed from the interlock <a href="https://logbooks.jlab.org/entry/4064052">https://logbooks.jlab.org/entry/4064052</a></p>
<p>UNSER temperature has been mostly stable with the new controller but occasionally fluctuated <a href="https://logbooks.jlab.org/entry/4064634">https://logbooks.jlab.org/entry/4064634</a></p>
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