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</style><article id="node-1042862" 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/3969838" rel="bookmark">Preliminary efficiency results from UV layer 1</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3969838/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3969838/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/3969838" class="lognumber" data-lognumber="3969838">3969838</a>. Submitted by <a href="https://logbooks.jlab.org/user/jeffas">jeffas</a> on <time datetime="2022-01-11T08:40:47-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1641904847&end_date=1641912047&book=HALOG">Tue, 01/11/2022 - 08:40</a></time>. </p>
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Last updated on <time datetime="2022-01-11T08:44:02-0500" pubdate="pubdate">Tue, 01/11/2022 - 08:44</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr></table></div>
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<p>The table below is the results from the efficiency scan of UV layer 1. The efficiencies are all lower than we expected, but the timing distribution for this module seems broader than the others, <a href="https://logbooks.jlab.org/entry/3969801">https://logbooks.jlab.org/entry/3969801</a>, so there may be something going on. We see if we look at the same run, but remove the timing cuts the efficiency jumps up by 10%, <a href="https://logbooks.jlab.org/entry/3969830">https://logbooks.jlab.org/entry/3969830</a>. So right now I am skeptical of the absolute value numbers and suspect they can be improved in analysis. Hopefully Andrew has some ideas here.<br />
Regardless the shape of the curve shows a plateau starting around 3628 V, so we will set our voltage there for now.</p>
<p>UVa UV Layer 1 / Module 1<br />
Voltage Run Efficiency Error<br />
3653 13184 72.29 0.64<br />
3628 13186 71.52 0.66<br />
3608 13187 67.2 0.67<br />
3564 13188 62.17 0.73<br />
3519 13189 50.26 0.76<br />
3475 13190 38.86 0.71<br />
3430 13191 28.23 0.68<br />
3385 13192 17.00 0.56</p>
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