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</style><article id="node-914462" 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/3841481" 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/3841481/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3841481/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/3841481" class="lognumber" data-lognumber="3841481">3841481</a>. Submitted by <a href="https://logbooks.jlab.org/user/cyero">cyero</a> on <time datetime="2020-09-05T08:56:31-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1599306991&end_date=1599314191&book=HCLOG">Sat, 09/05/2020 - 08:56</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>Sep 04 Swing (yesterday):
<ul><li>1L19 component down time (~ 14:04 - 19:07) <a href="https://logbooks.jlab.org/entry/3841189">1L19_DownTime</a></li>
<li>Beam restored to Hall C at ~20:30 <a href="https://logbooks.jlab.org/entry/3841207">Beam_Restored</a> </li>
</ul></li>
<li>Sep 05 Owl (today):
<ul><li>At 23:14, 2KN Cold Box Trip took down Injector / North Linac RF cavities. Estimated recovery time ~4-16 hours <a href="https://logbooks.jlab.org/entry/3841321">ColdBox_Trip</a></li>
</ul></li>
<li>Sep 05 Day (today):
<ul><li>As of 8:45, MCC send tune beam to Hall C <a href="https://logbooks.jlab.org/entry/3841458">Tune_Beam</a></li>
</ul></li>
</ul><b>General Hall C Updates:</b>
<ul><li> Sep 04 Swing (yesterday):
<ul><li> At 20:30 the initial attempts to steer beam into the Hall were made after a ~ 5 hr revovery from 1L19 <a href="https://logbooks.jlab.org/entry/3841189">1L19_DownTime_Closed</a>, <a href="https://logbooks.jlab.org/entry/3841207">https://logbooks.jlab.org/entry/3841207</a></li>
<li> From 20:39 - 20:52, Harp scans were done to check beam profile <a href="https://logbooks.jlab.org/entry/3841213">IHA3H07A</a>, <a href="https://logbooks.jlab.org/entry/3841216">IHA3H07B(fit1), </a><a href="https://logbooks.jlab.org/entry/3841217">IHA3H07B(fit2) </a> </li>
<li> At 21:00, CW beam restored to Hall C, and at 21:18, Pol He3 scraping checks were concluded <a href="https://logbooks.jlab.org/entry/3841236">PolHe3_Scraping_Tests</a></li>
<li> At 21:19, d2n Pol He3 production data-taking resumed for ~ 1 hr of beam-on-target. We still need ~1.5 hours at IHWP = IN to balance out the ~4 hrs at IHWP = OUT taken on Sep 04 (Owl, Day) </li>
</ul></li>
<li> Sep 05 Owl:
<ul><li>At ~23:14, the accelerator 2KN Cold Box Trip took down the Injector / North Linac for ~ 4 - 16 hours. <a href="https://logbooks.jlab.org/entry/3841321">ColdBox_Trip</a>. While the accelerator recovers:
<ul><li>EPR calibration was done after target was spun-up to +270 deg <a href="https://logbooks.jlab.org/entry/3841365">EPR_Plan</a>, <a href="https://logbooks.jlab.org/entry/3841366">EPR_Calibration</a> </li>
<li>Target was rotated back to +90 deg and NMR measurements were taken every ~5 hrs to bring polarization back to ~40 % faster <a href="https://logbooks.jlab.org/entry/3841383">Field_to_90deg</a> </li>
</ul></li>
</ul></li>
<li> Sep 05 Day:
<ul><li>As of Sep 05 Day (08:16), the most recent NMR measurement indicates a target polarization of ~39.7 % <a href="https://logbooks.jlab.org/entry/3841428">NMR_measurement</a></li>
<li>Refer to the Shift Crew Run Plan for details: <a href="https://logbooks.jlab.org/entry/3841423">Sep05_RunPlan</a></li>
</ul></li>
</ul><b>Recent NMR/pNMR Measurements (after 2KN ColdBox Trip):</b><br />
Sep 05 (Owl):
<ul><li> NMR: 02:06 | 33.4 % <a href="https://logbooks.jlab.org/entry/3841385">https://logbooks.jlab.org/entry/3841385</a></li>
</ul>
Sep 05 (Day):
<ul><li> NMR: 07:14 | 39.7 % <a href="https://logbooks.jlab.org/entry/3841428">https://logbooks.jlab.org/entry/3841428</a></li>
</ul><b>Recent IHWP Changes:</b><br />
Sep 03 (Swing, as of 19:58) | IHWP = IN
Sep 04 (Owl, as of 04:00) | IHWP = OUT <a href="https://logbooks.jlab.org/entry/3840776">https://logbooks.jlab.org/entry/3840776</a>
Sep 04 (Day, as of 12:01) | IHWP = IN <a href="https://logbooks.jlab.org/entry/3841011">https://logbooks.jlab.org/entry/3841011</a>
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