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</style><article id="node-702356" 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/3629460" 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/3629460/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3629460/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/3629460" class="lognumber" data-lognumber="3629460">3629460</a>. Submitted by <a href="https://logbooks.jlab.org/user/rmontgom">rmontgom</a> on <time datetime="2018-11-21T13:57:25-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1542823045&end_date=1542830245&book=HCLOG">Wed, 11/21/2018 - 13:57</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr><tr><th>Entry Makers: </th><td>rmontgom</td></tr></table></div>
<div class="logentry node-content">
<p>Hello from the incoming RC - thank you to Eric for his RC duties and smooth transition.</p>
<p>Summary since yesterday:<br />
- Beam since swing yesterday had several downtimes due to RF issues (see strip chart <a href="https://logbooks.jlab.org/entry/3629435">https://logbooks.jlab.org/entry/3629435</a>) - e.g. swing had 223min ABU, 250min BNA and owl had 152min ABU, 319min BNA.<br />
- MCC put beam off at ~22:45 for an extended time (1L24 power supply repair, 1L17 tuner repairs, MQC2A16 mismatch issue). See crew chief summary <a href="https://logbooks.jlab.org/entry/3629150">https://logbooks.jlab.org/entry/3629150</a> and <a href="https://logbooks.jlab.org/entry/3629153">https://logbooks.jlab.org/entry/3629153</a>.<br />
- Owl started with beam off and experienced several downtimes, including no beam from 5:50am until end of shift due to 1L17-8 issue (<a href="https://logbooks.jlab.org/entry/3629350">https://logbooks.jlab.org/entry/3629350</a>).<br />
- At 4.01am a Hall C Beamway HD Fire Alarm was triggered, a controlled access was made by experts. It was a false alarm and everything was reset (<a href="https://logbooks.jlab.org/entry/3629247">https://logbooks.jlab.org/entry/3629247</a>).<br />
- Day shift started with beam off due to the 1L17-8 issue and we had 45min downtime starting at ~10am caused by ARC4A tripping off (<a href="https://logbooks.jlab.org/entry/3629367">https://logbooks.jlab.org/entry/3629367</a>).</p>
<p>Status:<br />
- Data taking for kinematic group 15 has been on-going since end of day shift yesterday.<br />
- We just finished kinematic group 15 and will change configuration to group 11 imminently and start running with this group.</p>
<p>Further notices:<br />
- Hall A high beam current test happened this morning and is completed.<br />
- Steve added EPICS signals to alarm handler to avoid a repeat occurrence of the previous missing alarm when SHMS Q2 tripped (<a href="https://logbooks.jlab.org/entry/3629011">https://logbooks.jlab.org/entry/3629011</a>).</p>
<p>RC Meeting:<br />
- We will have an RC meeting today at 4:30pm, and no further meetings until Monday.<br />
- Until Mon we plan to have an informal meeting once per day in counting hut with spokespersons, unless there are major incidents or any special requests for a meeting. In which case please let me know.</p>
<p>Notices in effect for shift crews:<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, we will be moved over to 500 MHz laser. The current plan is for all Halls to go to restricted access on Monday morning and for Halls D/C to be locked up again Tuesday Swing.</p>
<p>Planned accesses to the hall:<br />
Monday, Nov 26: Work in the hall should be coordinated with Walter K. Aerogel change will take place (~8 hours duration Mon). HGC work will also take place, coordinating around aerogel change plans.<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 during the next access</p>
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