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</style><article id="node-913113" 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/3840132" 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/3840132/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3840132/delete?destination=email/send">Delete</a></li></ul></div>
<div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3840132" class="lognumber" data-lognumber="3840132">3840132</a>. Submitted by <a href="https://logbooks.jlab.org/user/cyero">cyero</a> on <time datetime="2020-09-03T08:51:38-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1599133898&end_date=1599141098&book=HCLOG">Thu, 09/03/2020 - 08:51</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr><tr><th>Entry Makers: </th><td>cyero</td></tr></table></div>
<div class="logentry node-content">
<b>Accelerator Status:</b>
<ul><li>RF recovery (Day Shift)
<ul><li>Beam restoration (~ 2 additional hours)</li>
</ul></li>
<li>Beam delivered to Hall C (~10 pm)</li>
<li>Very stable beam over Owl Shift (<a href="https://logbooks.jlab.org/entry/3840114">Owl_Beam_Summary</a>) </li>
</ul><b>General Hall C Updates:</b>
<ul><li>Target work completed (Sep 02, Day Shift):
<ul><li>Beam positions at ALL d2n glass cell targets (determined from laser alignment, Bill & Arun) were estimated to be (X,Y) = (0,0) mm.</li>
<li>Reference cell (Fauci) has been evacuated (vacuum).</li>
<li>Pol He3 Cell is set for transverse (+90 deg) polarization. (See 'Recent NMR measurements' for updates)</li>
</ul></li>
<li>Beam delivery at Hall C (Sep 02-03, Swing/Owl Shifts):
<ul><li>Beam checkout completed.</li>
<li>Reference cell filled with Hydrogen.</li>
<li>Verified beam positions determined from laser alignment to be at (0,0) mm for glass cells <a href="https://logbooks.jlab.org/entry/3839905">C-hole_and_Scraping_Tests</a></li>
</ul></li>
<li>d2n production data-taking (Sep 03, Owl Shift):
<ul><li>Electron paramagnetic resonance (EPR) tests/calibration completed (Junhao Chen, 1-2 hrs expected, started at ~ 2:00 am)
<ul><li>Junhao required planned controlled access as part of EPR tests (3:22 am)</li>
</ul></li>
<li>Harp scans were done again (3:51 am) as there was a controlled access <a href="https://logbooks.jlab.org/entry/3839972#comment-30593">IH3H07A</a>, <a href="https://logbooks.jlab.org/entry/3839977">IH3H07B</a> </li>
<li>Begin reference cell (for H2 and then N2, 1-hr-long run each) data-taking at Kin-A (HMS) and Kin-X (SHMS) at 4:04 am </li>
<li>Changed spectrometer kinematics to Kin-B (HMS), Kin-Y (SHMS) for 3 hrs of data at ref. cell (H2) and 3 hrs at (N2) </li>
<li>Moller measurement commenced at 8:00 am right after the kinematics change.</li>
</ul></li>
</ul><b>Recent NMR Measurements (Before EPR calibration):</b><br />
NOTE: Need to update "polarization.vi" fitting program with new EPR calibration constant (5.24 % / mV): <a href="https://logbooks.jlab.org/comment/30596#comment-30596">EPR_Calib_Constant</a>
<ul><li> 6:30 pm -> 27.6 % <a href="https://logbooks.jlab.org/entry/3839670">https://logbooks.jlab.org/entry/3839670</a></li>
<li> 8:41 pm -> 29.8 % <a href="https://logbooks.jlab.org/entry/3839726">https://logbooks.jlab.org/entry/3839726</a></li>
<li> 11:43 pm -> 32.7 % <a href="https://logbooks.jlab.org/entry/3839829">https://logbooks.jlab.org/entry/3839829</a> <br />
------NMR measurements taken after EPR Calibration------- </li>
<li> 3:12 am -> 24.2 % <a href="https://logbooks.jlab.org/entry/3840077">https://logbooks.jlab.org/entry/3840077</a> </li>
<li> 5:16 am -> 27.2 % <a href="https://logbooks.jlab.org/entry/3840077">https://logbooks.jlab.org/entry/3840077</a> </li>
<li> 7:56 am -> 27.6 % <a href="https://logbooks.jlab.org/entry/3840080">https://logbooks.jlab.org/entry/3840080</a> </li>
</ul><p>
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Meeting ID : 861439920 <br />
To join via phone : <br />
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2) Enter Conference ID : 861439920 <br /></p>
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