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</style><article id="node-1360274" 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/4287226" rel="bookmark">Run Plan update April 23 2024</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4287226/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4287226/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/4287226" class="lognumber" data-lognumber="4287226">4287226</a>. Submitted by <a href="https://logbooks.jlab.org/user/jcaylor">jcaylor</a> on <time datetime="2024-04-23T10:12:13-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1713877933&end_date=1713885133&book=HALOG">Tue, 04/23/2024 - 10:12</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr><tr><th>Entry Makers: </th><td>jcaylor</td></tr></table></div>
<div class="logentry node-content">
<p>Yesterday during the day shift we continued optics data taking with the sieve in. Beam delivery was a little more unstable than it had been the last few days so we were not able to get as many stats as we hoped but it should be good enough. </p>
<p>At the end of day shift the sieve was removed and more SBS GEM HV tweaks were done. These tweaks resulted in something like a 60% module efficiency in the back trackers. This efficiency was pretty stable overnight with high current production data. Roughly 50 % module efficiency was achieved in the front tracker but it seem like at the production currents occupancy is very high in the front tracker so efficiency dropped over night. We need to think about how we want to take production running and how much we need to worry about the front tracking efficiency. </p>
<p>After these HV tweaks a quick luminosity scan was done for the GEMs to check linearity with the new HV supplies. </p>
<p>Overnight we took production data with a BBCal threshold of 1.5 GeV. We were able to take 17 uA before running into the daq event rate limit. </p>
<p>Production went pretty smooth except for one extended communication loss when we had to reboot a bunch of things. - <a href="https://logbooks.jlab.org/entry/4286807">https://logbooks.jlab.org/entry/4286807</a> , <a href="https://logbooks.jlab.org/entry/4286948">https://logbooks.jlab.org/entry/4286948</a></p>
<p>The hall has just finished being swept for controlled access while Hall C is doing a pass change during the day shift today. Stop by the CH if you want to access the hall. </p>
<p>During the evening the readout window for the active analyzer was increased to check we did not have a significant timing difference. No peak was obvious in the extended window and it cut the DAQ rate in half so it was shorted back down to the original length. We still need to do some work to find the peak. - <a href="https://logbooks.jlab.org/entry/4286374">https://logbooks.jlab.org/entry/4286374</a> , <a href="https://logbooks.jlab.org/entry/4286441">https://logbooks.jlab.org/entry/4286441</a></p>
<p>After beam is restored we will continue production data. </p>
<p>Lets meet this afternoon at 3:30 for the RC meeting on the 2nd floor of the counting house and on zoom.</p>
<p>We will meet at 3:30 via zoom:</p>
<p><a href="https://jlab-org.zoomgov.com/j/1616220064">https://jlab-org.zoomgov.com/j/1616220064</a><br />
Meeting ID: 161 622 0064<br />
Passcode: 314159</p>
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