[Hallc_running] [New Logentry] RC Daily Update

Sat Sep 5 09:00:03 EDT 2020

Logentry Text:
--
<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>, https://logbooks.jlab.org/entry/3841207</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 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>
<li>Sep 05 (Owl):</li>
<ul>
  <li> NMR:  02:06 | 33.4 %  <a href="https://logbooks.jlab.org/entry/3841385">https://logbooks.jlab.org/entry/3841385</a></li>    
</ul>
<li>Sep 05 (Day):</li>
<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>
<li>Sep 03 (Swing, as of 19:58) | IHWP = IN </li>
<li>Sep 04 (Owl, as of 04:00)   | IHWP = OUT <a href="https://logbooks.jlab.org/entry/3840776">https://logbooks.jlab.org/entry/3840776</a> </li>
<li>Sep 04 (Day, as of 12:01)   | IHWP = IN <a href="https://logbooks.jlab.org/entry/3841011">https://logbooks.jlab.org/entry/3841011</a> </li>


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