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</style><article id="node-713250" 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/3640345" rel="bookmark">RC: Daily update</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3640345/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3640345/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/3640345" class="lognumber" data-lognumber="3640345">3640345</a>. Submitted by <a href="https://logbooks.jlab.org/user/mdiefent">mdiefent</a> on <time datetime="2018-12-19T09:05:15-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1545224715&end_date=1545231915&book=HCLOG">Wed, 12/19/2018 - 09:05</a></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">
<div style="caret-color: #313131; color: #313131; font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 14px; margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><span style="font-weight: bold;"><span style="font-family: Helvetica; font-size: 12px;">Update on day and swing shifts of Tuesday</span><span style="font-family: Helvetica; font-size: 12px;">, December 18, and owl shift of Wednesday, December 19</span></span><br style="font-family: Helvetica; font-size: 12px;" /><br style="font-family: Helvetica; font-size: 12px;" /><span style="font-weight: bold;"><span style="font-family: Helvetica; font-size: 12px;">CEBAF status</span></span><span style="font-family: Helvetica; font-size: 12px;">:</span><span style="font-family: Helvetica; font-size: 12px;"> </span></div><div style="font-family: Helvetica; font-size: 12px; caret-color: #313131; color: #313131;"><ul style="margin: 0px 0px 1.5em 30px; padding: 0px;"><li>Received 7.5 hours of beam during the day shift (<a href="https://logbooks.jlab.org/entry/3640114">https://logbooks.jlab.org/entry/3640114</a>). In this shift, there was a period of 140 minutes without any FSD trips. </li><li>Received 7.5 hours of beam during the swing shift (<a href="https://logbooks.jlab.org/entry/3640200">https://logbooks.jlab.org/entry/3640200</a>). </li><li>Received 7.0 hours of beam during the owl shift (<a href="https://logbooks.jlab.org/entry/3640276">https://logbooks.jlab.org/entry/3640276</a>). There were problems with tuning the RF separators (<a href="https://accweb.acc.jlab.org/dtm/all-events?incidentId=5641">https://accweb.acc.jlab.org/dtm/all-events?incidentId=5641</a>). </li><li>The physics run will end on Thursday, December 20, at 6:30 a.m. to prepare the accelerator shutdown at 7:00 a.m.. Accelerator and experimental facilities should be in restricted access by 9:00 a.m.. </li></ul></div><div style="caret-color: #313131; color: #313131; font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 14px; margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><span style="font-weight: bold;"><span style="font-family: Helvetica; font-size: 12px;">Hall C status</span></span><span style="font-family: Helvetica; font-size: 12px;">: </span></div><div style="font-family: Helvetica; font-size: 12px; caret-color: #313131; color: #313131;"><ul style="margin: 0px 0px 1.5em 30px; padding: 0px;"><li>Three-pass beam with an energy of 4.933 GeV is delivered to Hall C. </li><li>Hall C is setup for the Kaon LT experiment (E12-09-011). The experiments aims for the first precision measurements of L/T separated kaon electroproduction cross sections above the resonance region. Details on the Kaon LT experiment can be found on: <a style="text-decoration: none; color: #0000ee;" href="https://redmine.jlab.org/projects/kltexp/wiki">https://redmine.jlab.org/projects/kltexp/wiki</a></li><li>During the owl shift, there were computing problems (<a href="https://logbooks.jlab.org/entry/3640267">https://logbooks.jlab.org/entry/3640267</a>) affecting data taking for an hour ( <a href="https://logbooks.jlab.org/entry/3640332">https://logbooks.jlab.org/entry/3640332</a>). The problems were related to central computing issues (<a href="https://logbooks.jlab.org/entry/3640284">https://logbooks.jlab.org/entry/3640284</a>).</li></ul></div><div style="caret-color: #313131; color: #313131; font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 14px; margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><span style="font-weight: bold;"><span style="font-family: Helvetica; font-size: 12px;">Data taking</span></span><span style="font-family: Helvetica; font-size: 12px;">: </span></div><div style="font-family: Helvetica; font-size: 12px; caret-color: #313131; color: #313131;"><ul style="margin: 0px 0px 1.5em 30px; padding: 0px;"><li>The detailed run plan is available on: <a style="text-decoration: none; color: #0000ee;" href="https://redmine.jlab.org/attachments/download/590/runplan_4p9gev.pdf">https://redmine.jlab.org/attachments/download/590/runplan_4p9gev.pdf</a></li><li>We have done the harp scan: <a style="text-decoration: none; color: #0000ee;" href="https://logbooks.jlab.org/entry/3638031 ">https://logbooks.jlab.org/entry/3638031 </a>(see also 3638030 and the work documented in entries 3638025 and 638027)</li><li>We have completed the energy measurement during the day shift of December 14: <a style="text-decoration: none; color: #0000ee;" href="https://logbooks.jlab.org/entry/3638789 ">https://logbooks.jlab.org/entry/3638789 </a>(and 3638787 for details on beam size). The beam energy is 4.9320 +/- 0.0026 GeV. </li><li>We have taken the data for the calibration runs: Holly has done the sieve and beam position comparisons: <a style="text-decoration: none; color: #0000ee;" href="https://logbooks.jlab.org/entry/3638085">https://logbooks.jlab.org/entry/3638085</a>. Richard documented his analysis of the heep coincidence runs: <a style="text-decoration: none; color: #0000ee;" href="https://logbooks.jlab.org/entry/3638592 Nooffsets">https://logbooks.jlab.org/entry/3638592 Nooffsets</a> are observed in the missing mass and momentum distributions. </li><li>We are taking data for the SHMS angle of 6.00 degree with a beam charge of 16uA and LH2 target. We collected data for the thick dummy target. On Wednesday, December 19, we will decide if we will take data also for smaller beam currents than 16uA.</li><li>We have completed our charge goals for the SHMS angles of 8.86 and 11.86 degrees and for both LH2 and dummy targets. </li></ul></div><div style="font-family: Helvetica; font-size: 12px; margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><div style="caret-color: #313131; color: #313131; font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 14px; margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><span style="font-weight: bold;"><span style="font-family: Helvetica; font-size: 12px;">Hall C Daily RC meeting</span></span><span style="font-family: Helvetica; font-size: 12px;">: We will meet today at 4:15 p.m. (EDT) in the conference room on the second floor of the counting house. Remote participation will be possible via BlueJeans (ID: 861439920). You can join via:</span><span style="font-family: Helvetica; font-size: 12px;"> </span></div><ul style="caret-color: #313131; color: #313131; font-family: 'Trebuchet MS', 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 14px; margin: 0px 0px 1.5em 30px; padding: 0px;"><li><span style="font-family: Helvetica; font-size: 12px;">browser: <a style="text-decoration: none; color: #0000ee;" href="https://bluejeans.com/861439920">https://bluejeans.com/861439920</a></span></li><li><span style="font-family: Helvetica; font-size: 12px;">phone: (888) 240-2560 (US toll free); list of international phone numbers: <a style="text-decoration: none; color: #0000ee;" href="http://bluejeans.com/number">http://bluejeans.com/number</a></span></li></ul><div style="margin-top: 0.4em; margin-bottom: 0.8em; padding: 0px;"><span style="color: #313131;">We will review the status of the experiment, decide on if and when to change to lower beam current, and discuss our plans for the shutdown. </span></div></div> </div>
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