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</style><article id="node-1139243" 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/4066207" rel="bookmark">RC Update (10/22/2022): RC meeting cancelled today</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4066207/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4066207/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/4066207" class="lognumber" data-lognumber="4066207">4066207</a>. Submitted by <a href="https://logbooks.jlab.org/user/mnycz">mnycz</a> on <time datetime="2022-10-22T12:30:28-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1666452628&end_date=1666459828&book=HALOG">Sat, 10/22/2022 - 12:30</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr><tr><th>Entry Makers: </th><td>mnycz</td></tr></table></div>
<div class="logentry node-content">
<p>RC Update: 10/22/2022<br />
We are currently taking production data on the polarized helium-3 target. With no major issues to report, I suggest we skip todays RC meeting.</p>
<p>Summary of activities since yesterday:<br />
Paul started the parity DAQ up. It is currently running</p>
<p>During SWING shift, 1L10 dropped out of HV, bringing down the accelerator for ~2 hours: <a href="https://logbooks.jlab.org/entry/4065504">https://logbooks.jlab.org/entry/4065504</a><br />
The polarized target group to the opportunity to take several EPR measurements to help characterize the target.<br />
Some notes from Hunter: <a href="https://logbooks.jlab.org/entry/4065553">https://logbooks.jlab.org/entry/4065553</a><br />
And additional comments from Gordon regarding the polarization: <a href="https://logbooks.jlab.org/entry/4065642">https://logbooks.jlab.org/entry/4065642</a></p>
<p>Since these measurements caused the polarization to drop to ~20%, we adjusted the run plan to opportunistically perform a luminosity scan for the SBS GEMs<br />
Unfortunately, MCC could not deliver 5 uA on the carbon optics target to begin the study so it was abandoned.<br />
Holly's notes and comments regarding the attempted luminosity scan.<br />
Simona is looking into what the issue could be.</p>
<p>Afterwards, the polarization of the target was above 25%, so an additional beam checkout was performed to ensure the beam position and raster we what we expected and we subsequently began production on the polarized Helium-3 target during OWL and DAY<br />
The CODA configuration was changed to noSBSGems config to check for any differences in the number of CODA crashes: <a href="https://logbooks.jlab.org/entry/4065803">https://logbooks.jlab.org/entry/4065803</a></p>
<p>When moving the target to the pickup coils for a NMR measurement, there was a Laser fiber temp alarm which was addressed by the TO: <a href="https://logbooks.jlab.org/entry/4066058">https://logbooks.jlab.org/entry/4066058</a><br />
Arun stopped in to check everything out and he and Bill updated the trip limits on the Fire Safety RTD: <a href="https://logbooks.jlab.org/entry/4066110">https://logbooks.jlab.org/entry/4066110</a></p>
<p>The rest of the weekend will be spent taking polarized Helium-3 data. The current has increased closer to the 45 uA but we are still trying to work with Hall C to ensure smooth beam delivery (and acceptable beam current) over the weekend.<br />
Have a great weekend!</p>
<p>Mike Nycz, Hall A RC</p>
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