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</style><article id="node-474747" 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/3401919" rel="bookmark">RC Report for Friday, April 22</a>
</h1>
</header><div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3401919" class="lognumber" data-lognumber="3401919">3401919</a>. Submitted by <a href="https://logbooks.jlab.org/user/vasulk">vasulk</a> on <time datetime="2016-04-22T12:39:45-0400" pubdate="pubdate">Fri, 04/22/2016 - 12:39</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>vasulk</td></tr></table></div>
<div class="logentry node-content">
<p>Since yesterday afternoon, we have been smoothly running production at 60 uA on the LH2 target. The beam trips<br />
have been reasonable so far with about 10 per hour. This provides maybe a 70% to 80% beam up time during an<br />
hour long run, depending on the length of the trips. Earlier this morning, MCC took the beam away at 09:00 to check<br />
the Hall B laser. Beam was restored at 09:30. Unfortunately at 10:46, the accelerator begin to suffer from multiple<br />
BLA trips and several IOCs needed to be rebooted. They are still struggling to get stable high current back to Hall A.</p>
<p>At 17:00, MCC will begin to bring Hall B back up to run three halls over the weekend. Then the rest of the weekend<br />
should be production running until Monday morning at 06:00 when beam goes off for this run period.</p>
<p>Last night, a one-hour run was taken on the 15 cm dummy target for background estimates. Based on this run, we will<br />
probably take an additional 2-3 hours of dummy target data later this weekend after we get more statistics on the LH2<br />
target.</p>
<p>Issues:<br />
Ciprian Gal and Caryn Palatchi have reported that the new receiver is saturating at 60 uA. See relevant entries below.<br />
We have some independent confirmation from the right HRS analysis of the BCM calibration yesterday as well. DVCS is<br />
currently analyzing the left HRS data. Unfortunately, this means the signals from the new receiver are not useful for high<br />
current running. We could adjust the gain on the receiver, but then we lose any calibration from these signals. The analog<br />
BCM signals are still good, and we will have to rely on those for our charge normalization during this period of running.</p>
<p><a href="https://logbooks.jlab.org/entry/3401893">https://logbooks.jlab.org/entry/3401893</a></p>
<p><a href="https://logbooks.jlab.org/entry/3401894">https://logbooks.jlab.org/entry/3401894</a></p>
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