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</style><article id="node-1154688" 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/4081652" rel="bookmark">RC Update -- Saturday 11/12</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4081652/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4081652/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/4081652" class="lognumber" data-lognumber="4081652">4081652</a>. Submitted by <a href="https://logbooks.jlab.org/user/pdbforce">pdbforce</a> on <time datetime="2022-11-12T12:52:42-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1668271962&end_date=1668279162&book=HALOG">Sat, 11/12/2022 - 12:52</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2022-11-12T14:11:19-0500" pubdate="pubdate">Sat, 11/12/2022 - 14:11</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr></table></div>
<div class="logentry node-content">
<h2>Accelerator and Hall Status</h2>
<ul><li>Beam came back around 10pm last night. We started our beam checkout procedure immediately. <a href="https://logbooks.jlab.org/entry/4081217">4081217</a></li>
<li>Unfortunately the beam profile was way off! It took them ~ 4hours to adjust the beam width! Yves was present the whole time to supervise the operator on shift. Thank you so much, Yves! There is not really a clear explanation on why the beam profile was so different at the beginning but a lot of work was done on the NL RFs to fix the issues accelerator was having so it is not surprising that there were some affects on the beam profile.</li>
<li>We started production data taking around 3pm. Things have been relatively smooth since then.</li>
<li>Target polarization looks great! It went up to <b>47.4%</b> last night, right before we started production! Here is a quick history of NMR measurements:
<table><tr><th>Time</th>
<th>Polarization (%)</th>
<th>Comments</th>
</tr><tr><td>2:06 am</td>
<td>47.4</td>
<td>Right before we started production</td>
</tr><tr><td>4:22 am</td>
<td>44.6</td>
</tr><tr><td>6:51 am</td>
<td>43.7</td>
</tr><tr><td>9:07 am</td>
<td>43.1</td>
</tr></table></li><li>I informed MCC about our plan to do a Moller measurement on Thursday (11/17) day. They were happy with it.</li>
</ul><h2>Run Plan for Today</h2>
<ul><li>Continue taking production data with 43 uA beam current</li>
<li>Do NMR sweeps every 2/3 hours</li>
</ul><h2>Special Requests</h2> <b style="color:red;">Needs Attention!</b>
MCC will do beam maintenance on Tuesday. They will take beam away ~ 6:45 am and the whole procedure will take at least one and half shift. If anyone wants to make an access to the hall during that time, then <b>please let me know before hand.</b> We have limited number of access key, so proper coordination is absolutely necessary. Here is the list of requests I have so far:<br /><table><tr><th>Purpose</th>
<th>Coordinator</th>
<th>No. of Access Keys Needed</th>
<th>Preferred Time</th>
</tr><tr><td>Hall A walkthrough</td>
<td>Simona Malace</td>
<td> 3 </td>
<td>Before 4pm</td>
</tr><tr><td>Left dump and Compton IC diagnosis</td>
<td>Jerry Kowal</td>
<td> 3 </td>
<td>Not sure</td>
</tr></table><p>As discussed on Friday, we will <b>NOT</b> meet today for a daily RC meeting. Feel free give a call to the RC phone (757 876 1787) or send me an email (<a href="mailto:pdbforce@jlab.org">pdbforce@jlab.org</a>) if you have any questions or concerns. Happy Saturday!</p>
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