[Hallc_running] [New Logentry] RC Daily Update

cyero at jlab.org cyero at jlab.org
Tue Sep 8 09:15:01 EDT 2020

Logentry Text:
<b>Accelerator Status:</b>
  <li>Sep 07/08 Swing/Owl (yesterday, today):
      <li> 2L18-4 Preventig filaments (16:34 - 17:06)  <a href="https://logbooks.jlab.org/entry/3843341">2L18-4</a> </li>
      <li> RSEP9A tripped off (22:21 - ~02:50)  <a href="https://logbooks.jlab.org/entry/3843492">RSEP9A_trip</a> </li>
      <li> Injector cavity 0L04-04 not making gradient (5:05 - 5:56)  <a href="https://logbooks.jlab.org/entry/3843693">INJ_grad</a>,  <a href="https://logbooks.jlab.org/entry/3843713">INJ_grad_follow-up</a></li>
      <li> Injector OR region steering problem (6:21 - 7:42) <a href="https://logbooks.jlab.org/entry/3843716">INJ_OR_steering</a> </li>
      <li> *Not the best Owl shift the accelerator has had in terms of beam delivery during Owl (~50 min only)* </li>
  <li>Sep 08 Day (today):
      <li> Accelerator working on trying to restore beam.  As of 08:55, pathlength checked for Hall C beam and looks good. <a href="https://logbooks.jlab.org/entry/3843785">beam_pathlength_check</a></li>
      <li> Beam restored to Hall C at ~ 09:00 </li>									    

<b>General Hall C Updates:</b>
  <li> Sep 07/08 Swing/Owl (yesterday, today):
      <li> Mingyu Chen updated the TO training slides with procedure for fitting pNMR, as there were issues with fitting program. See log-entry: <a href="https://logbooks.jlab.org/entry/3842395">pNMR_TO_update</a> </li>
      <li> During Sep 07 Swing, d2n production continued at IHWP = IN configuration. We still needed ~50 min. of "beam-on-target" before the next IHWP change, which we were able to obtain during Owl.</li>
      <li> What are "acceptable" beam profile check (Harp scans) parameters? How much can we compromse with? Will bring up at RC meeting today. <a href="https://logbooks.jlab.org/entry/3843675">Harp_scans_Sep08_Owl</a> </li>
      <li> Beam Current History during Sep 07/08 Swing/Owl:  <a href="https://logbooks.jlab.org/entry/3843546">Sep07_Swing</a>,  <a href="https://logbooks.jlab.org/entry/3843769">Sep08_Owl</a> </li>
  <li> Sep 08 Day (today):
      <li> As of 09:05, Hall C is receiving tune beam. Beam profile checks --> <a href="https://logbooks.jlab.org/entry/3843795">IHA3H07A</a>,  <a href="https://logbooks.jlab.org/entry/3843797">IHA3H07B</a> </li>
      <li> Will proceed wil Pol He3 scraping checks and and start d2n production for ~480 min at the IHWP = OUT configuration. </li>
      <li> MCC 7:45 meeting NOTE: PD (Jay) informed Ops will need to sent beam to C as part of beam studies (Sep 08 Swing, 16:30 - 19:30). We will need to be in no "No Target" position during beam studies.</li>
      <li> During beam studies today at Swing, we plan to do target temperature tests (target expert, Junhao Chen) which is expected to take ~3-4 hrs. Then we will spin-up the target to 270 deg and take d2n reference cell data
	until ~40 polarization is achieved to start taking d2n Pol He3 production data.</li>

<b>Recent NMR/pNMR Measurements:</b><br>
<li>Sep 07 (Day/Swing):</li>
  <li> NMR:  07:06 | 39.5 %  <a href="https://logbooks.jlab.org/entry/3842931">https://logbooks.jlab.org/entry/3842931</a></li>
  <li> pNMR: 07:06 | 41.0 %  <a href="https://logbooks.jlab.org/entry/3842931">https://logbooks.jlab.org/entry/3842931</a></li>
  <li> NMR:  12:17 | 39.6 %  <a href="https://logbooks.jlab.org/entry/3843219">https://logbooks.jlab.org/entry/3843219</a></li>
  <li> pNMR: 12:17 | 43.5 %  <a href="https://logbooks.jlab.org/entry/3843219">https://logbooks.jlab.org/entry/3843219</a></li>
  <li> NMR:  17:45 | 39.1 %  <a href="https://logbooks.jlab.org/entry/3843378">https://logbooks.jlab.org/entry/3843378</a></li>
  <li> NMR:  22:50 | 39.3 %  <a href="https://logbooks.jlab.org/entry/3843518">https://logbooks.jlab.org/entry/3843518</a></li>
<li>Sep 08 (Owl):</li>
  <li> NMR:  04:53 | 41.0 %  <a href="https://logbooks.jlab.org/entry/3843678">https://logbooks.jlab.org/entry/3843678</a></li>
  <li> pNMR: 04:53 | 35.6 % <a href="https://logbooks.jlab.org/entry/3843678">https://logbooks.jlab.org/entry/3843678</a></li>

<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>
<li>Sep 05 (Day, as of 14:55)   | IHWP = OUT <a href="https://logbooks.jlab.org/entry/3841696">https://logbooks.jlab.org/entry/3841696</a> </li>
<li>Sep 06 (Owl, as of 07:00)   | IHWP = IN <a href="https://logbooks.jlab.org/entry/3842175">https://logbooks.jlab.org/entry/3842175</a> </li>
<li>Sep 06 (Swing, as of 22:04) | IHWP = OUT <a href="https://logbooks.jlab.org/entry/3842667">https://logbooks.jlab.org/entry/3842667</a> </li>
<li>Sep 07 (Day, as of 12:11)   | IHWP = IN <a href="https://logbooks.jlab.org/entry/3843209">https://logbooks.jlab.org/entry/3843209</a> </li>
<li>Sep 08 (Owl, as of 05:05)   | IHWP = OUT <a href="https://logbooks.jlab.org/entry/3843688">https://logbooks.jlab.org/entry/3843688</a> </li>

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