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</style><article id="node-893393" 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/3820414" rel="bookmark">Hall B RC Daily Report</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3820414/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3820414/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/3820414" class="lognumber" data-lognumber="3820414">3820414</a>. Submitted by <a href="https://logbooks.jlab.org/user/narbe">narbe</a> on <time datetime="2020-08-04T07:48:31-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1596538111&end_date=1596545311&book=HBLOG">Tue, 08/04/2020 - 07:48</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2020-08-04T13:04:04-0400" pubdate="pubdate">Tue, 08/04/2020 - 13:04</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hblog">HBLOG</a></td></tr><tr><th>Entry Makers: </th><td>narbe</td></tr></table></div>
<div class="logentry node-content">
<p>Yesterday:<br />
18:29 Finished Deuterium data with 1-pass and tours out-bending; changed target back to Hydrogen <a href="https://logbooks.jlab.org/entry/3820207">https://logbooks.jlab.org/entry/3820207</a></p>
<p>22:03 RTPC HV trips; brought back <a href="https://logbooks.jlab.org/entry/3820292">https://logbooks.jlab.org/entry/3820292</a> </p>
<p>Take data on Hydrogen through remainder of Swing and in to Owl</p>
<p>Today:<br />
Onset of Tropical Storm<br />
01:17 Beam starts tripping </p>
<p>02:00 Tornado warning until around 02:05. Shift workers go to shelter during this.</p>
<p>02:30 Call from MCC to inform that machine will be back only after 10 am when the storm is over. Magnets are ON and the gas flow to the detectors is also ON, but all HV are OFF.</p>
<p>05:10 RTPC flow is reduced to 230sccm even if there is no increase in RTPC pressure (RTPC - ambient remained almost constant)</p>
<p>07:20 Call from Eugene to inform that he is de-energizing magnets <a href="https://logbooks.jlab.org/entry/3820407">https://logbooks.jlab.org/entry/3820407</a></p>
<p>Told Accelerator will be back only after 10 am when the storm Isaias goes away from Newport News <a href="https://cebaf.jlab.org/dtm/open-events?event_id=6711">https://cebaf.jlab.org/dtm/open-events?event_id=6711</a><br />
At 08:00 MCC meeting we were given an estimated time range for beam possibly returning somewhere between 22:00 tonight and 08:00 tomorrow morning. After talking with the PDL and Hall B Leader, it seemed prudent to not have day shift expert come in today and for swing expert to check in at 20:00 tonight. </p>
<p>With beam down for a while we will have Radcon survey around the solenoid and BOM for Y. Gotra to check the FMT cables and for E. Pasyuk to be able to work on the BOM.<br />
Radcon should be in around noon.</p>
<p>12:43 M. Hattawy purges and refills Hydrogen target gas <a href="https://logbooks.jlab.org/entry/3820474">https://logbooks.jlab.org/entry/3820474</a></p>
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