[Hallc_running] [New Logentry] RC Daily Update

cyero at jlab.org cyero at jlab.org
Fri Sep 4 09:25:01 EDT 2020

Logentry Text:
<b>Accelerator Status:</b>
  <li>Sep 03 Swing (yesterday): 1L19 component down time (~ 15:46 - 19:30) <a href="https://logbooks.jlab.org/entry/3840446">https://logbooks.jlab.org/entry/3840446</a> </li>
  <li>Sep 04 Owl:
      <li>2L09 component out of HV (00:00 - 00:24)</li>
      <li>Cavity Issues (no beam from  02:00 - 02:35)</li>
      <li>Overall FSD trips ~35 trips/hr at 04:30-05:00 (highest during Owl)</li>
      <li>As of 07:15, beam trips downward trend with < 20 trips/hr </li>
      <li>Summary of Beam Current during Owl: <a href="https://logbooks.jlab.org/entry/3840898">https://logbooks.jlab.org/entry/3840898</a></li>							

<b>General Hall C Updates:</b>
  <li> (Sep 03, Swing Shift):
    <li>Polarization of He3 target ~37.5 % @ 15:45 (close to 40% polarization threshold). </li>
    <li>During 1L19 downtime incident, decided to change to Kin-C (HMS: -4.0 GeV/c, 20.0 deg) and Kin-Z (SHMS: -5.6 GeV/c, 18.0 deg ). <br>
      to prepare for Pol He3 production data-taking.  <a href="https://logbooks.jlab.org/entry/3840482">Spec_Angle_Change</a>, <a href="https://logbooks.jlab.org/entry/3840496">Spec_Momentum_Change</a></li>
    <li>At ~19:30, 1L19 downtime incident closed.</li>
      <li>Requested Harp Scans and checked beam profile.  <a href="https://logbooks.jlab.org/entry/3840536">IHA3H07A</a>, <a href="https://logbooks.jlab.org/entry/3840542">IHA3H07B</a> </li>
      <li>Checked for scraping of Pol He3 target cell at 5 uA.  <a href="https://logbooks.jlab.org/entry/3840586">Pol_He3_scraping_test</a> </li>
      <li>Commenced Pol He3 production data-taking at 25 uA (19:58). <a href="https://logbooks.jlab.org/entry/3840563">HMS_Start_of_Run</a>,  <a href="https://logbooks.jlab.org/entry/3840562">SHMS_Start_of_Run</a> </li>

<b>Recent NMR/pNMR Measurements (After EPR calibration):</b><br>
<li>Sep 03 (Day/Swing):</li>
  <li> NMR:  15:45 | 37.5 %  <a href="https://logbooks.jlab.org/entry/3840418">https://logbooks.jlab.org/entry/3840418</a></li>    
  <li> pNMR: 15:59 | 36.85 %  <a href="https://logbooks.jlab.org/entry/3840435">https://logbooks.jlab.org/entry/3840435</a></li>
  <li> NMR:  18:28 | 38.06 %  <a href="https://logbooks.jlab.org/entry/3840504">https://logbooks.jlab.org/entry/3840504</a></li>    
<li>Sep 04 (Owl):</li>
  <li> NMR:  05:33 | 41.7 %  <a href="https://logbooks.jlab.org/entry/3840819">https://logbooks.jlab.org/entry/3840819</a></li>    
  <li> pNMR: 05:33 | 57.2 %  <a href="https://logbooks.jlab.org/entry/3840819">https://logbooks.jlab.org/entry/3840819</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>

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