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</style><article id="node-913144" 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/3840163" rel="bookmark">RC Daily Update </a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3840163/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3840163/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/3840163" class="lognumber" data-lognumber="3840163">3840163</a>. Submitted by <a href="https://logbooks.jlab.org/user/tianye">tianye</a> on <time datetime="2020-09-03T10:02:24-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1599138144&end_date=1599145344&book=HALOG">Thu, 09/03/2020 - 10:02</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>tianye</td></tr></table></div>
<div class="logentry node-content">
<p>We got beam back at 19:24 yesterday. The beam spot on target was checked (166,02(x) x183.92(y) um) <a href="https://logbooks.jlab.org/entry/3839694">https://logbooks.jlab.org/entry/3839694</a>. Then, raster size and carbon hole have been verified with the spot++ <a href="https://logbooks.jlab.org/entry/3839698">https://logbooks.jlab.org/entry/3839698</a> and <a href="https://logbooks.jlab.org/entry/3839700">https://logbooks.jlab.org/entry/3839700</a>. After that, Adam checked the Compton rate. We went back to production at 20:40. 150uA Beam ran about 10 mins then went away due to the 5th Pass Vertical Separator Amp 2 trips. MCC tuned Hall C (came back from their target work) for a while. Late swing (23:00), beam was back, and the shift crew ramped high current on 1% C target first then went to 48Ca target to start production. </p>
<p>During today's Owl shift, at the beginning we had a trippy beam, after that the number of beam tripps has been improved after the RF recovery. We had smooth production (average efficiency 56%) during the owl shift. Since Pete Francis replaced the S&H module of bpm11 (<a href="https://logbooks.jlab.org/entry/3839520">https://logbooks.jlab.org/entry/3839520</a>) during the RF recovery, Cameron took a 45mins bpm pedestal run with the stable beam during the owl shift (<a href="https://logbooks.jlab.org/entry/3839941">https://logbooks.jlab.org/entry/3839941</a>). New pedestals apply to runs after 8183. </p>
<p>We collected 2.7C (swing+owl shifts) so far. The Plan for today is to keep running production. </p>
<p>We have scheduled a Moller polarimetry measurement to begin Friday morning at 8:30AM.</p>
<p> Future planned down time<br />
1) On Sept.8, 4-hours beam study was planned by PD </p>
<p>We will have our remote RC meeting at 3:30 PM today. Bluejeans link: <a href="https://bluejeans.com/256205934">https://bluejeans.com/256205934</a></p>
<p>Ye Tian<br />
(Hall A Run Coordinator)</p>
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