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</style><article id="node-610441" class="node node-logentry article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3537564" rel="bookmark">Status Update</a>
</h1>
</header><div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3537564" class="lognumber" data-lognumber="3537564">3537564</a>. Submitted by <a href="https://logbooks.jlab.org/user/pooser">pooser</a> on <time datetime="2018-02-24T01:33:01-0500" pubdate="pubdate">Sat, 02/24/2018 - 01:33</time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/elog">ELOG</a></td></tr><tr><th>Entry Makers: </th><td>pooser</td></tr></table></div>
<div class="logentry node-content">
<p>There are still 2 owl shifts that require shift leaders, Monday and Tuesday (2/26 & 2/27). Please sign up for these shifts if you can.</p>
<p>Day shift started out with the SHMS at -2.5 Gev, 39 deg, and HMS at -3.3 GeV, 21 deg with an LD2 target. Shortly after 9 am, the HMS momentum was decreased to -1.5 Gev and swung out to 59 deg. Production data was taken until ~1 pm at which time Q2 tripped (<a href="https://logbooks.jlab.org/entry/3537163">https://logbooks.jlab.org/entry/3537163</a>). This couldn’t have occurred at a more convenient time since the accelerator was taken down in order to replace the cooling fan on the C100 cavity 1L22.</p>
<p>At this time a controlled access was taken by the Steve L. et. al. to address the infamous Q2 power supply. The magnet work was completed around 4pm (<a href="https://logbooks.jlab.org/entry/3537306">https://logbooks.jlab.org/entry/3537306</a>) and 50 uA on LH2 was restored. Issues with the HMS pre-shower and shower sum signals were resolved and the troublesome pedestals remained calm (<a href="https://logbooks.jlab.org/entry/3537466">https://logbooks.jlab.org/entry/3537466</a>).</p>
<p>The remainder of swing shift was comprised of ratty beam (<a href="https://logbooks.jlab.org/entry/3537467">https://logbooks.jlab.org/entry/3537467</a>) and production data on LH2, LD2, and 10 cm dummy targets according to the F2/XEM run plan were taken. MCC increased our ramp rate in attempt to reduce the amount of downtime as a result of frequent trips.</p>
<p>Moving forward we will complete collecting the 10k e-’s with the 10 cm dummy target and then we will proceed with LH2 data taking. We plan to stay there through the night so as to minimize configuration changes.</p>
<p>Work currently planned during Monday’s (2/26) beam studies starting at 9 am:<br />
Joe Beaufait: diagnose (and potentially fix) HMS door/shutter breaker (<a href="https://logbooks.jlab.org/entry/3535292">https://logbooks.jlab.org/entry/3535292</a>)<br />
Andrew: install five Y strainers on the SHMS power supply LCW lines. The power supplies will have to be ramped down and turned off</p>
<p>Special notices in effect for shift crews:<br />
Trouble shooting HMS Q2 power supply: <a href="https://logbooks.jlab.org/entry/3537306">https://logbooks.jlab.org/entry/3537306</a><br />
Don't ramp HMS Q2 higher than 610A: <a href="https://logbooks.jlab.org/entry/3535714">https://logbooks.jlab.org/entry/3535714</a><br />
TO Instructions for LH2 <--> LD2 switches : <a href="https://logbooks.jlab.org/entry/3534487">https://logbooks.jlab.org/entry/3534487</a><br />
Maximum Boron targets is 40 muA: <a href="https://logbooks.jlab.org/entry/3535297">https://logbooks.jlab.org/entry/3535297</a><br />
Any missing reference time messages should not be ignored: <a href="https://logbooks.jlab.org/entry/3535289">https://logbooks.jlab.org/entry/3535289</a></p>
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