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</style><article id="node-1224588" 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/4151551" rel="bookmark">Daily RC Summary</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4151551/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4151551/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/4151551" class="lognumber" data-lognumber="4151551">4151551</a>. Submitted by <a href="https://logbooks.jlab.org/user/hattawy">hattawy</a> on <time datetime="2023-03-18T13:45:58-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1679157958&end_date=1679165158&book=HBLOG">Sat, 03/18/2023 - 13:45</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2023-03-18T13:46:59-0400" pubdate="pubdate">Sat, 03/18/2023 - 13:46</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>hattawy</td></tr></table></div>
<div class="logentry node-content">
<p>From March 17th Day shift - till - March 18th Owl shift</p>
<p>Day shift (March 17th)<br />
- Work summary: Took data on ND3+ / HWP out till 9:30 AM. Target Group annealed and flipped the target polarization to negative. Beam came back at 14:43. Target Pol was around -25.5%.<br />
- Issues: There was a major down because of water leak then HV trips at IL09. Therefore, we started the target work at 9:30 AM instead of our planned 10:00 AM (target work did not waste any minute of beam!)<br />
- Data Summary: 91M triggers. ABU: 1.7 hours , BNA: 6.1 hours</p>
<p>Swing shift (March 17th)<br />
- Work summary: Continued taking data with ND3- / HWP out. Target polarization was slightly getting better with time. It got to -31.1% by the end of the shift.<br />
- Issues: no major issues.<br />
- Major request: If anyone wants to change the Microwave frequency remotely, please inform the shift expert or the RC before you start doing anything and definitely identify yourself.<br />
- Data Summary: 170M triggers (+60M on the ongoing run 17794) . ABU: 6.6 hours , BNA: 1.3 hours</p>
<p>Owl shift (March 18th)<br />
- Work summary: Continued taking data with ND3- / HWP out. Target polarization got to -32% then dropped to -28% in an hour. The shift expert contacted Chris Keith on this who instructed the expert to change the Microwave frequency. Unfortunately, there was an accident in implementing the instructions and the target polarization dropped to -15%. Chris took over and fixed the setting and the polarization started to build up again. It is -33% (@ 13:41).<br />
- Issues: The three hours down time from the accelerator was because of a failed air hose in 1L24.<br />
- Data Summary: 180M triggers. ABU: 3.5 hours, BNA: 4.3 hours</p>
<p>Plan for the next 24 hours: at the end of today's Day shift, we will flip the HWP to IN and run Bill's code to optimize the online beam charge asymmetries. We will change the target to C on tomorrow, Sunday 03/19, at 09:00 AM. PD/MCC/RadCon/Target Group are informed. </p>
<p>No RC meeting today.</p>
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