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</style><article id="node-702790" 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/3629892" rel="bookmark">RC Daily Update</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3629892/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3629892/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/3629892" class="lognumber" data-lognumber="3629892">3629892</a>. Submitted by <a href="https://logbooks.jlab.org/user/rmontgom">rmontgom</a> on <time datetime="2018-11-22T13:11:32-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1542906692&end_date=1542913892&book=HCLOG">Thu, 11/22/2018 - 13:11</a></time>. </p>
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<div class="ctools-collapsible-container"><div class="ctools-collapsible-handle"><a href="#">There is 1 comment...</a></div><div class="ctools-collapsible-content"><a id="comment-18737"></a>
<article class="comment comment-new comment-by-node-author odd first clearfix"><header class="comment-header"><h3 class="comment-title">
<a href="https://logbooks.jlab.org/comment/18737#comment-18737" rel="bookmark">Added info to notices in effect for shift crew</a> </h3>
<em class="new">new</em>
</header><footer class="submitted"><p class="author-datetime">by <a href="https://logbooks.jlab.org/user/rmontgom" title="View user profile." class="username">rmontgom</a> on <time datetime="2018-11-22T14:44:29-0500" pubdate="pubdate">Thu, 11/22/2018 - 14:44</time></p>
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<div class="field field-name-comment-body field-type-text-long field-label-hidden view-mode-elog_email"><div class="field-items"><div class="field-item even"><p>Addition to notices in effect for shift crews:<br />
* For data runs, in addition to increasing current until SHMS singles rates are between 450k-500k, please also remember to check the trigger pre-scales (PS6=0 all the time, adjusting PS4 to give at least 100Hz, and no more than 200Hz, of HMS singles, PS1=PS2=PS3=PS5=-1)</p>
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<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr></table></div>
<div class="logentry node-content">
<p>Happy Thanksgiving!</p>
<p>Summary and status:<br />
- There was an extended downtime starting during owl shift (owl had ~68.5% BNA and 31.5% ABU) (<a href="https://logbooks.jlab.org/entry/3629838">https://logbooks.jlab.org/entry/3629838</a>). This was mostly caused by a loss of communication with 1L24 in the north linac.<br />
- Since swing yesterday we have been taking production data for Group 11 (Q2 = 5.0, x = 0.5, pi+).<br />
- Beam is back now since ~12:10 and we are continuing data taking on group 11.<br />
- This will be followed by: Group 12 (Q2 = 5.0, x = 0.5, pi-), SHMS electron singles at end of setting 12, Group 8 (Q2 = 3.979, x = 0.5, pi-), Group 7 (Q2 = 3.979, x = 0.5, pi+).</p>
<p>RC Meeting:<br />
- We have no planned RC meetings until Monday. Unless there is a special request then please let me know.</p>
<p>Notices in effect for shift crews:<br />
* NB!!! If the HV trips for SHMS S1Y5B contact Simona M. '''DO NOT change the HV from the nominal value!'''<br />
* Shift leaders, please fill out the check list once per shift!<br />
* It is no longer required to fill out the standard.kinematics file online, it is now done automagically<br />
* Split the large desired charge between multiple runs (~1 hour per run)<br />
* Listed currents are estimates. For runs at less than 70uA, increase current until SHMS singles rates are between 450k-500k.<br />
* How-to power cycle PLC I/O chassis: <a href="https://logbooks.jlab.org/entry/3625862">https://logbooks.jlab.org/entry/3625862</a>, <a href="https://logbooks.jlab.org/entry/3625900">https://logbooks.jlab.org/entry/3625900</a></p>
<p>Planned accelerator configuration changes:<br />
Monday, Nov 26: Energy change to 1.86 GeV/pass and move to 500 MHz laser. Hall will go to restricted access on Monday morning and current aim is to be locked up again Tuesday Swing. There will be a separate e-mail about shift updates.</p>
<p>Planned accesses to the hall:<br />
Monday, Nov 26: Work in the hall should be coordinated with Walter K. Important aerogel change taking place (~8 hours duration Mon). HGC work will also take place. D. Meekins will also investigate loop 3 JT valve issue.<br />
Tuesday, Nov 27: installing brushes near the spectrometer wheels for S. Lassiter (originally planned for Tue/Wed).<br />
Please let me know if there are any other plans for work in the hall.</p>
<p>Special requests:<br />
Harp scan at 3H07A and 3H07B with raster off to address possible issues with harp (<a href="https://logbooks.jlab.org/entry/3624463">https://logbooks.jlab.org/entry/3624463</a>).<br />
Vijay Kumar (Regina group) has requested a walkthrough Monday morning.</p>
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