[Halla_running] [Revised Logentry] RC Update -- Saturday 11/12

[pdbforce at jlab.org]

Logentry Text:
--
<h2>Accelerator and Hall Status</h2>
<ul>
  <li>Beam came back around 10pm last night. We started our beam checkout procedure immediately. <a href="https://logbooks.jlab.org/entry/4081217">4081217</a></li>
  <li>Unfortunately the beam profile was way off! It took them ~ 4hours to adjust the beam width! Yves was present the whole time to supervise the operator on shift. Thank you so much, Yves! There is not really a clear explanation on why the beam profile was so different at the beginning but a lot of work was done on the NL RFs to fix the issues accelerator was having so it is not surprising that there were some affects on the beam profile.</li> 
  <li>We started production data taking around 3pm. Things have been relatively smooth since then.</li>
  <li>Target polarization looks great! It went up to <b>47.4%</b> last night, right before we started production! Here is a quick history of NMR measurements:<il>
<table>
  <tr>
    <th>Time</th>
    <th>Polarization (%)</th>
    <th>Comments</th>
  </tr>
  <tr>
    <td>2:06 am</td>
    <td>47.4</td> 
    <td>Right before we started production</td>
  </tr>
  <tr>
    <td>4:22 am</td>
    <td>44.6</td> 
  </tr>
  <tr>
    <td>6:51 am</td>
    <td>43.7</td> 
  </tr>
  <tr>
    <td>9:07 am</td>
    <td>43.1</td> 
  </tr>
</table>
  <li>I informed MCC about our plan to do a Moller measurement on Thursday (11/17) day. They were happy with it.</li>
</ul>

<h2>Run Plan for Today</h2>
<ul>
  <li>Continue taking production data with 43 uA beam current</li>
  <li>Do NMR sweeps every 2/3 hours</li>
</ul>

<h2>Special Requests</h2> <b style="color:red;">Needs Attention!</b> 
MCC will do beam maintenance on Tuesday. They will take beam away ~ 6:45 am and the whole procedure will take at least one and half shift. If anyone wants to make an access to the hall during that time, then <b>please let me know before hand.</b> We have limited number of access key, so proper coordination is absolutely necessary. Here is the list of requests I have so far:<br> 
 <table>
  <tr>
    <th>Purpose</th>
    <th>Coordinator</th>
    <th>No. of Access Keys Needed</th>
    <th>Preferred Time</th>
  </tr>
  <tr>
    <td>Hall A walkthrough</td>
    <td>Simona Malace</td>
    <td> 3 </td>
    <td>Before 4pm</td>
  </tr>
  <tr>
    <td>Left dump and Compton IC diagnosis</td>
    <td>Jerry Kowal</td>
    <td> 3 </td>
   <td>Not sure</td>
  </tr>
</table>


<p>As discussed on Friday, we will <b>NOT</b> meet today for a daily RC meeting. Feel free give a call to the RC phone (757 876 1787) or send me an email (pdbforce at jlab.org) if you have any questions or concerns. Happy Saturday!</p>


---

This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4081652
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halla_running/attachments/20221112/c8728411/attachment.html>