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</style><article id="node-840133" 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/3767171" rel="bookmark">RC Summary Jan 19</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3767171/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3767171/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/3767171" class="lognumber" data-lognumber="3767171">3767171</a>. Submitted by <a href="https://logbooks.jlab.org/user/hauenst">hauenst</a> on <time datetime="2020-01-19T12:59:19-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1579453159&end_date=1579460359&book=HBLOG">Sun, 01/19/2020 - 12:59</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2020-01-19T13:00:02-0500" pubdate="pubdate">Sun, 01/19/2020 - 13:00</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hblog">HBLOG</a></td></tr><tr><th>Entry Makers: </th><td>hauenst</td></tr></table></div>
<div class="logentry node-content">
<p>Here a summary of the last 20h or so.</p><p>We had relatively stable beam without any major down times. During late swing yesterday the 120kHz fluctuations in the timing structure came back (<a href="https://logbooks.jlab.org/entry/3766663">https://logbooks.jlab.org/entry/3766663</a>). The decision was made to wait till Day to see the development and access the problem when more people would be available. THe DC occupancies and DAQ live time were fine. Between 4-5a.m. the fluctuations vanished (<a href="https://logbooks.jlab.org/entry/3766950">https://logbooks.jlab.org/entry/3766950</a>) and were not coming back up to now. Maybe this is related to some resets in the injector due to chopper water skid problems (<a href="https://logbooks.jlab.org/entry/3766892">https://logbooks.jlab.org/entry/3766892</a>, see also entry from PD <a href="https://logbooks.jlab.org/entry/3767115">https://logbooks.jlab.org/entry/3767115</a>).</p><p>In total we collected 11.7 ABUs from 20 (58.6%) in the last 2.5 shifts.</p><p>We are continuing production at 45nA.</p><p>Side note: There was also a Hall-A target event aound midnight. Cole made an interesting entry (<a href="https://logbooks.jlab.org/entry/3767085">https://logbooks.jlab.org/entry/3767085</a>) about seeing it possibly also in Hall-B</p> </div>
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