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</style><article id="node-1356469" 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/4283421" rel="bookmark">RC Update</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4283421/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4283421/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/4283421" class="lognumber" data-lognumber="4283421">4283421</a>. Submitted by <a href="https://logbooks.jlab.org/user/chandan">chandan</a> on <time datetime="2024-04-19T10:15:12-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1713532512&end_date=1713539712&book=HCLOG">Fri, 04/19/2024 - 10:15</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>chandan</td></tr></table></div>
<div class="logentry node-content">
<br /><br />
Since yesterday, we have been taking data smoothly while the beam was available. Here are some notable things that have happened since yesterday, and the short-term run plan:
<ul><li>Moller polarization measurement -9 am -1 pm. Beam polarization ~ 83%. <a href="https://logbooks.jlab.org/entry/4282422"> Moller summary </a></li>
<li>During Moller polarization measurement, the spectrometer angles and HMS magnets were set for positron running for kinematics kinC_x36_1.
</li><li>The chiller was filled around 1 pm yesterday, but the chiller started giving rising temperature problems just after the filling. There was an escorted access to check the chiller. Things seemed cooler from inside the hall. A chiller reboot fixed the issue. <a href="https://logbooks.jlab.org/entry/4282454">Chiller filling </a>, <a href="https://logbooks.jlab.org/entry/4282655">Temperature rise </a>,<a href="https://logbooks.jlab.org/entry/4282735">Temperature after chiller reboot </a> </li>
<li>Positron data taking was completed around 11 pm and HMS magnets were set for production. Since then, we have been running production smoothly and hopefully will continue until Monday.</li>
<li>There was a white alarm for raster. It seemed MCC rebooted the raster IOC. The raster set currents were reloaded properly after the reboot, while the current limits were not. Mentioned it in the 7:45 am meeting. <a href="https://logbooks.jlab.org/entry/4283044"> Raster IOC reboot </a> </li>
<li>Here are the last three shift summaries from <a href="https://logbooks.jlab.org/entry/4282157"> yesterday's day </a>, <a href="https://logbooks.jlab.org/entry/4282598"> yesterday's swing </a>, and <a href="https://logbooks.jlab.org/entry/4283017"> and today's owl </a>. ABU for last 24 hours - 15.3 hours (up time 21.4 hours).</li>
<li> <span style="color: #ff0000;"> There are open shifts next week. Please sign up if you can. <a href="https://misportal.jlab.org/mis/apps/physics/shiftSchedule/index.cfm?experimentRunId=DVCS-NPS-2023"> Shift signup page </a></span></li>
</ul><br />
Updates from 8 am MCC meeting:
<ul><li> Plan for the BCM calibration and escorted access to move the calorimeter is communicated with the MCC.</li>
<li> It was reconfirmed that the fourth pass separator needs some (3-4 hours) work before they can extract the beam from the fourth pass. MCC is working to minimize this down time by parallelly working for the Wein setting in the injector.</li>
</ul><br />
We will have a regular RC meeting at 11:00 am today in the CH conference room.
People can join remotely via:
<br /><a href="https://jlab-org.zoomgov.com/j/1617015555?pwd=L09IQ216dml6ZmM5ODExVjFsMX"> Zoom link </a>
Meeting ID: 161 701 5555
<br />
Passcode: 288953
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