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</style><article id="node-634519" class="node node-logentry article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3561635" rel="bookmark">RC: Daily update</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3561635" class="lognumber" data-lognumber="3561635">3561635</a>. Submitted by <a href="https://logbooks.jlab.org/user/mdiefent">mdiefent</a> on <time datetime="2018-04-16T09:50:17-0400" pubdate="pubdate">Mon, 04/16/2018 - 09:50</time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr></table></div>
<div class="logentry node-content">
<p><strong>CEBAF status</strong>:</p><ul><li>Recovery from path length adjustments and a few other problems during the day shift of April 15 (<a href="https://logbooks.jlab.org/entry/3561216">https://logbooks.jlab.org/entry/3561216</a>) limited the available beam time to 4.2 hours. </li><li>5.3 hours of beam time during the swing shift of April 15 (<a href="https://logbooks.jlab.org/entry/3561381">https://logbooks.jlab.org/entry/3561381</a>). </li><li>Apart from path length adjustment and a quench of 2L24 (<a href="https://logbooks.jlab.org/entry/3561553">https://logbooks.jlab.org/entry/3561553</a>), there has been stable beam during the owl shift with 6.5 hours of beam. </li><li>Beam studies for high current running until 4:00 p.m..</li><li>RF recovery is scheduled for Tuesday, April 17, for about six hours. Controlled accesses will be possible during that time period.</li></ul><p><strong>Hall C status</strong>:</p><ul><li>Hall C is configured for the SIDIS experiment (E12-09-017). The HMS is setup for detecting electrons and the SHMS is setup for detecting charged pions and kaons. Details on the experimental setup are available on: <a href="https://hallcweb.jlab.org/wiki/index.php/E12-09-017_Run_Plan#Experimental_setup ">https://hallcweb.jlab.org/wiki/index.php/E12-09-017_Run_Plan#Experimenta...</a></li><li>For various theta angles in the HMS, the beam current is reduced significantly to keep the pTRIG1 rate below 500kHz. </li><li>Problems with the control of liquid helium into HMS Q3 (<a href="https://logbooks.jlab.org/entry/3561073">https://logbooks.jlab.org/entry/3561073</a> and the following entries).</li><li>We are in a controlled access to work on the HMS dipole power supply (Jack Segal, Steve Lassiter) and on the HMS Q3 valve (Andrew Kenyon) but will leave the Hall latest at 11:00 a.m. so that our beam studies can study on time. </li></ul><p><strong>Data taking</strong>:</p><ul><li>The detailed run plan is available on: <a href="https://hallcweb.jlab.org/wiki/index.php/E12-09-017_Run_Plan ">https://hallcweb.jlab.org/wiki/index.php/E12-09-017_Run_Plan </a></li><li>For kinematic setting 1, we have completed 10 out of 14 measurements with positive SHMS polarimetry and 6 out of 14 measurements with negative SHMS polarimetry. </li><li>The data taking of the SIDIS experiment with various configuration changes between the runs requires three persons on shift. We have many open slots in the shift schedule (<a href="https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=HALLC-2017-2018">https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=HA...</a>), in particular for next week’s owl shift. We need more volunteers for shifts and have reached out to all members of the SIDIS/Kaon-LT rungroup.</li></ul><p><strong>Hall C Daily RC meeting</strong>: We will meet today at 1:30 p.m. in the conference room located on the second floor of the counting house. Remote participation will be possible via Blue Jeans (Meeting ID: 543903672). You can join via:</p><ul><li>browser: <a href="https://bluejeans.com/543903672 ">https://bluejeans.com/543903672 </a></li><li>phone: (888) 240-2560 (US toll free), list of international numbers: <a href="https://bluejeans.com/numbers">https://bluejeans.com/numbers</a></li></ul></div>
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