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<article id="node-1409658" class="node node-logentry article ia-n clearfix" role="article">
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<a href="https://logbooks.jlab.org/entry/4336598" rel="bookmark">Cryogenic Switchover from ESR To ESR2 </a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4336598" class="lognumber" data-lognumber="4336598">4336598</a>. Submitted by <a href="https://logbooks.jlab.org/user/kashy">kashy</a> on <time datetime="2025-03-06T13:56:30-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1741283790&end_date=1741290990&book=HBSOLENOID&book=HBTORUS&book=CLOG">Thu, 03/06/2025 - 13:56</a></time>. </p>
<table class="field-vitals">
<tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hbsolenoid">HBSOLENOID</a> <a href="https://logbooks.jlab.org/book/hbtorus">HBTORUS</a> <a href="https://logbooks.jlab.org/book/clog">CLOG</a></td></tr>
<tr><th>Entry Makers: </th><td>kashy, dinsley</td></tr>
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<p>ESR 1 to ESR 2 switch over began at ~8:36 pm Thursday March 6<br />
Plots to follow the main signals are running in the counting house</p>
<p>At 11:48 we rearranged our valve setup to allow bypassing the magnet cold mass's and flow a batch of warm helium back to our ambient vaporizer at the request of Chris P from Cryo.<br />
At 13:12 we have 100% LL in the Solenoid Lead Reservoir, 50% in the Solenoid Magnet Reservoir, and 60% in the Torus Lead Reservoir. We requested to go to Cold Return to ESR2.</p>
<p>With the intention of slightly reducing the time to recover the Hall B Magnets during operation and after a trip we have requested the Max for EV6711B to go to 60% from 50% and this has been incorporated by Cyro. We also have changed the Setpoint for EV8111CD Liquid Level from 82% to 40%</p>
<p>13:45 Hall B Magnets are on Cold Return with liquid levels satisfied. </p>
<p>Congratulations to the CRYOGENICS Group for a JOB WELL DONE!</p>
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