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</style><article id="node-1126801" 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/4053765" rel="bookmark">RC Daily Summary, Oct 10th 2022.</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4053765/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4053765/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/4053765" class="lognumber" data-lognumber="4053765">4053765</a>. Submitted by <a href="https://logbooks.jlab.org/user/deurpam">deurpam</a> on <time datetime="2022-10-10T07:36:38-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1665398198&end_date=1665405398&book=HBLOG">Mon, 10/10/2022 - 07:36</a></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>deurpam</td></tr></table></div>
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<p>Summary from Sunday-Day (10/9/2022) to Monday-Owl (10/10/2022)</p>
<p>General Summary:<br />
The Sunday-Day to Monday-Owl period was relatively good, with about 12h of ABU. During day shift, standard production continued with BHWP IN and a target polarization of about 76% (according to NMR). The beam was slightly too high and the raster radius too large and the top of the cell wall could be seen in high statistics raster histograms. Beam position was lowered and the raster size decreased. (The white board and wiki instruction are updated). The target expert came in to optimize the RF frequency, but it seems it was already good: there was no improvement in the target polarization. During swing shift, beam delivery was impaired by several problems, notably with the 5-pass separator (just ~1h of ABU). These problems were fixed by ~1:40am and production restarted afterward. Due to the low beam availability during the swing shift, the change of BHWP (from IN to OUT) initially scheduled for 7am Monday is postponed to the end of the day shift. </p>
<p>Status: NH3 target is polarized at: +71% as of Monday 10/10/22 6am, according to NMR. BHWP: IN. Beam charge asymmetry is about 0.1% .</p>
<p>Events accumulated:<br />
308M as of 6:00am (up to run 17150)</p>
<p>Plan:<br />
-Continue data taking with BHWP IN until end of day shift Monday Oct. 10th (unless significant there are significant beam down times, i.e. beam efficiency is much lower than 50%). Inform HALL A that the BHWP will be changed, then ask MCC to change the beam HWP to OUT. EVEN if AT 2 PASS HALL A NEEDS TO BE INFORMED BEFORE HAND.<br />
-Take production runs with BHWP OUT for about 24h, starting with a 20M event run in PRO66_PIN configuration, then go to normal PROD66 configuration for the next runs.</p>
<p>We will have a RC meeting today at 2pm.</p>
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