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</style><article id="node-703669" 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/3630770" 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/3630770/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3630770/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/3630770" class="lognumber" data-lognumber="3630770">3630770</a>. Submitted by <a href="https://logbooks.jlab.org/user/rmontgom">rmontgom</a> on <time datetime="2018-11-24T10:52:20-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1543071140&end_date=1543078340&book=HCLOG">Sat, 11/24/2018 - 10:52</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2018-11-24T10:52:51-0500" pubdate="pubdate">Sat, 11/24/2018 - 10:52</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>Summary/status:<br />
- Swing yesterday completed production data taking on Group 12 (Q2 = 5.0, x = 0.5, pi+).<br />
- SHMS was moved for electron singles data collection. During rotation of spectrometers there was a drive controller error. Expert advice was sought and an escorted access was made to reset the shunt trip breakers, which worked. This was followed by a ~3h30 downtime due to NL13 issues from ~21:00.<br />
- Owl crew completed electron singles data and moved to Group 8 (Q2 = 3.979, x = 0.5, pi-). At ~5am there was a frozen DAQ issue, arising from loss of communication with cdaql3. Expert was called (B. Sawatzky), who came to counting house, power cycled cdaql3, ran an fsck and re-booted all ROCs (<a href="https://logbooks.jlab.org/entry/3630647">https://logbooks.jlab.org/entry/3630647</a>) (thank you Brad).<br />
- Day shift continue to take data on Group 8, and will soon move to Group 7 (Q2 = 3.979, x = 0.5, pi+).<br />
- The plan after this is Groups 3 (Q2=4, x=0.4, pi+) and 4 (Q2=4, x=0.4, pi-), followed by 17 (Q2=5.5, x=0.5, z=0.7, pi+ and pi-) and 18 (Q2=5.5, x=0.5, z=0.6, pi+ and pi-).</p>
<p>RC Meeting:<br />
- We have no planned RC meetings until Monday. Unless there is a special request.</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 automatically<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 />
* Remember to check trigger pre-scales before runs (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).<br />
* Check that the pre-scaler gui is active and hasn't frozen/doesn't need re-started, especially between target changes<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 Monday morning and aim is to be locked up again Tuesday Swing. There has been a separate e-mail about shift updates. TO needed for all shifts. SL cancelled Mon day 11/26, Mon swing 11/26, Tue owl 11/27, Tue day 11/27. SL on standby Tue swing 11/27, Wed owl 11/28 and Wed day 11/28. SL shifts normal from Wed swing 11/28 currently. If on standby please be ready to come to counting house. We will know more Tue/Wed about expected beam delivery - stay tuned for updates to schedule.</p>
<p>Planned accesses to the Hall:<br />
Monday, Nov 26: Work in Hall should be coordinated with Walter K. Aerogel change by V. Berdnikov (~8 hours duration Mon). HGC work by B. Sawatzky and University of Regina team. D. Meekins will investigate target loop 3 JT valve issue. V. Kumar (Regina group) walkthrough Monday morning.<br />
Tuesday, Nov 27: installation of brushes near the spectrometer wheels for S. Lassiter (originally planned for Tue/Wed).<br />
Please let me know any other plans for work in the Hall Mon/Tue.</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>). Has to be done before shut down in Dec.</p>
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