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</style><article id="node-1003309" 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/3930293" rel="bookmark">Hall C RC update: 10/22/2021</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3930293/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3930293/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/3930293" class="lognumber" data-lognumber="3930293">3930293</a>. Submitted by <a href="https://logbooks.jlab.org/user/mack">mack</a> on <time datetime="2021-10-22T09:12:24-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1634904744&end_date=1634911944&book=HCLOG">Fri, 10/22/2021 - 09:12</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr><tr><th>Entry Makers: </th><td>mack</td></tr><tr><th>References: </th><td><a href="https://logbooks.jlab.org/entry/3929669">3929669 - Hall C RC update: 10/21/2021</a></td></tr></table></div>
<div class="logentry node-content">
<p>If you recall, beam came back around 2am on Thursday. We then had production for roughly half a day until the next bump in the road. (axle-breaking pothole, whatever) </p>
<p>We've been down since ~3pm Thursday due to a ground fault in Arc 7. The PD, Markus D, called around 7:15pm Thursday and said it is thought to be in the downstairs magnets and not in the upstairs power supply. So Hall C and D are down hard until probably Friday late day or early swing. This time estimate has considerable uncertainty. If they don't quickly find a smoking gun when they get into the tunnel, then because there is a large number of magnets in series in Arc 7, Sarin P noted they'll have to start disconnecting power cables and do a binary search. Ugh. Reality!</p>
<p>We always need the TO. As for Friday day shift, the SL and remote worker were informed to go Standby as soon as I had an updated time estimate at the 8am meeting. </p>
<p>Hall A pass change now possibly moved to Sunday. Secretary of Energy tour on Monday morning. </p>
<p>The running total of pions is 4127.</p>
<p>We will have an RC meeting tomorrow/Friday at 10am.</p>
<p>Bluejeans link: <a href="https://bluejeans.com/861439920">https://bluejeans.com/861439920</a><br />
RC meeting page: <a href="https://hallcweb.jlab.org/wiki/index.php/RC_Meeting,_Friday,_October_22_,_2021">https://hallcweb.jlab.org/wiki/index.php/RC_Meeting,_Friday,_October_22_...</a></p>
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