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</style><article id="node-861876" 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/3788907" rel="bookmark">RC Update 2/21/2020</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3788907/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3788907/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/3788907" class="lognumber" data-lognumber="3788907">3788907</a>. Submitted by <a href="https://logbooks.jlab.org/user/adaq">adaq</a> on <time datetime="2020-02-21T13:22:20-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1582305740&end_date=1582312940&book=HALOG">Fri, 02/21/2020 - 13:22</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2020-02-21T13:22:21-0500" pubdate="pubdate">Fri, 02/21/2020 - 13:22</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr><tr><th>Entry Makers: </th><td>skbarcus</td></tr></table></div>
<div class="logentry node-content">
Dear Collaborators,<br /><br />
We will have our usual meeting upstairs in the counting house at 3:15 pm today. Bluejeans link for remote participants: <a href="https://bluejeans.com/256205934">https://bluejeans.com/256205934</a><br /><br />
We lost significant time yesterday to the ESR incident. We ramped the magnets down right after the incident happened. The hall was swept and the techs made an access to assess that the vacuums and magnets were all ok. The valves around the Compton were closed to prevent any dust from entering when other valves were opened or closed. The techs were able to provide the all clear for the the hall. At this point the magnets needed to be refilled with helium and then ramped back up. Ramp up began around 11 PM. <br /><br />
While waiting for the magnets we were able to restablish beam without the target or detectors for various studies. Amali completed steering the beam through the Compton. Ye completed beam modulation tests. Caryn came back in and performed Unser, SAM, and BPM calibrations and FFB tests (Thank you for coming back in and staying so late, Caryn!). Around 4 AM we were able to return to Ca48 production running without FFB which we remained in until day shift.<br /><br />
At ~9:00 AM today MCC restored FFB (still no fast forward) and we returned to Ca48 production (see log 3788791) where we currently remain.<br /><br />
Outstanding Issues:<br /><br />
1. We still have one expert shift that needs filling for Sunday Swing shift. Thank you to those who filled our other openings!<br />
2. Feed forward still doesn't work, but we appear to be currently running fine without it. <br /><br />
Resolved Issues:<br /><br />
1. Successfully recovered from ESR trip.<br />
2. FFB resestablished with Ca48 target.<br /><br />
Best,<br /><br />
Scott Barcus<br />
(current Hall A Run Coordinator)<br /></div>
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