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<a href="https://logbooks.jlab.org/entry/4425731" rel="bookmark">RC Summary July 23 - July 24 Owl</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4425731" class="lognumber" data-lognumber="4425731">4425731</a>. Submitted by <a href="https://logbooks.jlab.org/user/schmidta">schmidta</a> on <time datetime="2025-07-24T08:51:10-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1753357870&end_date=1753365070&book=HBLOG">Thu, 07/24/2025 - 08:51</a></time>. </p>
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<tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hblog">HBLOG</a></td></tr>
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<p>This is the RC summary for Day Shift July 23 through Owl shift July 24.</p>
<p>Yesterday was a maintenance and RF recovery day. The half-wave plate was taken out. The target gas was switched back to He-4. During the down time, several tasks were completed in the hall, including<br />
- The 2C24 vacuum gauge head was replaced (<a href="https://logbooks.jlab.org/entry/4424993">https://logbooks.jlab.org/entry/4424993</a>)<br />
- A PMT on the ECal was replaced. (<a href="https://logbooks.jlab.org/entry/4425062">https://logbooks.jlab.org/entry/4425062</a>)<br />
- The ice ball that had formed on the VCL was dealt with (<a href="https://logbooks.jlab.org/entry/4425093">https://logbooks.jlab.org/entry/4425093</a>)<br />
- A flow meter on the toroid was replaced (<a href="https://logbooks.jlab.org/entry/4425207">https://logbooks.jlab.org/entry/4425207</a>)</p>
<p>Restoration of beam began around 18:00. A Moeller run was conducted (<a href="https://logbooks.jlab.org/entry/4425284">https://logbooks.jlab.org/entry/4425284</a>), measuring a polarization of 89.4 +/- 1.3 %. Restoration was set back by an hour due to a comms error on a magnet in the hall (<a href="https://logbooks.jlab.org/entry/4425343">https://logbooks.jlab.org/entry/4425343</a>) but DC power got it sorted out. After an ATOF trip sequence (<a href="https://logbooks.jlab.org/entry/4425464">https://logbooks.jlab.org/entry/4425464</a>), production running was resumed in owl shift around 01:00, and data taking was smooth over night.</p>
<p>ABU for last 24h</p>
<p>- 6.9h of ABUs ~ 29% efficiency,</p>
<p>- Total ABUs since April 5th: 1163.4+6.9=1170.3 --> 1170.3 / (75.5 * 24) = 64.6% </p>
<p>- Day 110 of 151 scheduled: 110/151= 72.8%</p>
<p>- BANU: 6.1h due to restoring beam after the shut down, ATOF trips, DAQ crashes</p>
<p>Plan for today:<br />
* Production on He with 325nA</p>
<p>RC meeting:</p>
<p>The RC Meeting will be part of the weekly ALERT Meeting today, at 10:00 (EST) in CH Room 200C and online via Zoom</p>
<p>Zoom meeting ID: 981 7906 3617<br />
Passcode: 252073<br />
Zoom Link: <a href="https://ijclab.zoom.us/j/98179063617?pwd=NjVTaisxY1d6eTVjM25LNFlMUW9QZz09">https://ijclab.zoom.us/j/98179063617?pwd=NjVTaisxY1d6eTVjM25LNFlMUW9QZz09</a></p>
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