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</style><article id="node-1029871" 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/3956850" rel="bookmark">Follow-up Re: Follow-up Re: Question UVA UV GEM</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3956850/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3956850/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/3956850" class="lognumber" data-lognumber="3956850">3956850</a>. Submitted by <a href="https://logbooks.jlab.org/user/puckett">puckett</a> on <time datetime="2021-12-05T11:24:43-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1638717883&end_date=1638725083&book=BIGBITE&book=HALOG&book=SUPERBIGBITE">Sun, 12/05/2021 - 11:24</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2021-12-05T11:26:43-0500" pubdate="pubdate">Sun, 12/05/2021 - 11:26</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/bigbite">BIGBITE</a> <a href="https://logbooks.jlab.org/book/halog">HALOG</a> <a href="https://logbooks.jlab.org/book/superbigbite">SUPERBIGBITE</a></td></tr><tr><th>References: </th><td><a href="https://logbooks.jlab.org/entry/3956838">3956838 - Follow-up Re: Question UVA UV GEM</a></td></tr></table></div>
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<p>I would not lower the HV on this GEM. The HV setting on this GEM was already pretty close to optimal from the efficiency scan. Some saturation in some small fraction of events is inevitable. This plot does not indicate any problem. I do NOT think the gain is too high. In, fact, you see this in some fraction of events in EVERY module: </p>
<p><a href="https://logbooks.jlab.org/files/2021/12/3956832/summaryPlots_12569_GMN_critical.pdf">https://logbooks.jlab.org/files/2021/12/3956832/summaryPlots_12569_GMN_c...</a></p>
<p>So let's please understand what we're looking at before we start recommending changes in the experiment running conditions.</p>
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