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<article id="node-1433110" class="node node-logentry article ia-n clearfix" role="article">
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<a href="https://logbooks.jlab.org/entry/4360050" rel="bookmark">RC daily update</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4360050" class="lognumber" data-lognumber="4360050">4360050</a>. Submitted by <a href="https://logbooks.jlab.org/user/simona">simona</a> on <time datetime="2025-04-18T12:37:34-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1744990654&end_date=1744997854&book=HCLOG">Fri, 04/18/2025 - 12:37</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2025-04-18T13:04:34-0400" pubdate="pubdate">Fri, 04/18/2025 - 13:04</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>simona</td></tr>
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<p>Yesterday we got beam back around 1:50 pm after machine recovery from Wed. maintenance day. We did harp scans at 3H07A,B and checked beam alignment on the C-hole (<a href="https://logbooks.jlab.org/entry/4359106">https://logbooks.jlab.org/entry/4359106</a>, <a href="https://logbooks.jlab.org/entry/4359110">https://logbooks.jlab.org/entry/4359110</a>, <a href="https://logbooks.jlab.org/entry/4359150">https://logbooks.jlab.org/entry/4359150</a>). Our best beam positions right now are (+0.25,0) at 3H07A and (-0.7,0) at 3H07C in (x,y) - we adjusted the y beam position by 0.3 mm. By ~2:44 pm we were running production on LD2 at 0.3 muA.</p>
<p>The beam has been very stable overnight and throughout the day so far. On the hall side there was a brief interruption in data taking starting with ~ 9 am due to HMS and SHMS magnets PSs interlocking on magnet lead flow inadequacy. This was the consequence of a Hall B Solenoid trip (<a href="https://logbooks.jlab.org/entry/4359897">https://logbooks.jlab.org/entry/4359897</a>) that led to instabilities in the warm return flow which instead triggered the interlocks on all SHMS and HMS magnets PSs. The shift crew recovered the SHMS magnets pretty quickly and all but one of the HMS magnets. The data taking resumed at ~ 10 am with SHMS and LAD only while Heidi and Danny (Hall B) were working to balance the Hall B and Hall C cryo needs. Shortly after 11 am all HMS magnets were up.</p>
<p>We plan to continue data taking on LD2 at 0.3 muA today and throughout the weekend.</p>
<p>We will have an RC meeting today at 2:30 pm on the second floor of the counting house and online at the link posted here: <a href="https://logbooks.jlab.org/entry/4346862">https://logbooks.jlab.org/entry/4346862</a></p>
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