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</style><article id="node-1209627" 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/4136590" rel="bookmark">RC Daily Summary for Wednesday, February 22</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4136590/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4136590/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/4136590" class="lognumber" data-lognumber="4136590">4136590</a>. Submitted by <a href="https://logbooks.jlab.org/user/gilfoyle">gilfoyle</a> on <time datetime="2023-02-22T09:21:29-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1677072089&end_date=1677079289&book=HBLOG&book=HBRUN&book=TARGETLOG">Wed, 02/22/2023 - 09:21</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hblog">HBLOG</a> <a href="https://logbooks.jlab.org/book/hbrun">HBRUN</a> <a href="https://logbooks.jlab.org/book/targetlog">TARGETLOG</a></td></tr><tr><th>Entry Makers: </th><td>gilfoyle</td></tr></table></div>
<div class="logentry node-content">
<p>RC Daily Summary Wednesday, February 22, 2023</p>
<p>Day Shift (Tuesday):<br />
Planned Data taking on CH2 target, Solenoid 5.08 T, Torus inbending 3766 A.<br />
Beam is trippy with periods of no beam that last several minutes.<br />
MVT HV strips are tripping at a high rate. Yuri adjusts the gas flow controller. Improves, but still see some trips.<br />
Continue to have periods with no beam.<br />
Collected ~ 47M events.</p>
<p>Evening/Swing Shift<br />
Planned Data taking CH2 target, Solenoid 5.08 T, Torus inbending 3766 A.<br />
Beam is available most of the shift.<br />
Collected ~87M events.</p>
<p>Owl Shift:<br />
Data taking with CH2 target, Solenoid 5.08 T, Torus inbending 3766 A.</p>
<p>At start of shift problems with BMT Ar gas flow fraction caused BMT HV to turn off. The Ar/C4H10 gas flow restored by the shift workers using guidance from Yuri.</p>
<p>01:30 Beam was restored and we ran for about ~3 hours before we again had problems with the BMT Ar gas flow fraction which again shut off the BMT HV. Yuri and Denny (Engineering-on-call) were called. The problem was traced back to the C4H10 bottle running out of gas. Switched to a pre-mixed bottle and bypassed the Ar Gas Flow Fraction interlock to get CLAS12 back up and ready for beam by 07:00. Beam was not available the rest of the shift.</p>
<p>08:30 Switched back to unmixed gas and restored the interlocks. Still waiting for beam at 09:10.</p>
<p>Collected ~37M events</p>
<p>Day Shift (Wednesday):<br />
Data taking with CH2 target, Solenoid 5.08 T, Torus inbending 3766 A.</p>
<p>Plan:<br />
Data taking on CH2 all day</p>
<p>We will have a RC meeting today at 2:15 PM after the 1:30 PM MCC meeting.</p>
<p>RC Meeting Coordinates:<br /><a href="https://jlab-org.zoomgov.com/j/1608674253?pwd=SFZyYmZLWXJieGtpV2dEdVRiUE">https://jlab-org.zoomgov.com/j/1608674253?pwd=SFZyYmZLWXJieGtpV2dEdVRiUE</a>...<br />
Meeting ID: 160 867 4253<br />
Passcode: 786506</p>
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