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<p>People,</p>
<p>Please find the minutes below and <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_May_2,_2019#Minutes">here</a>.</p>
<p> -- Mark</p>
<p>________________________________________________________________</p>
<p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Minutes, GlueX Start Counter Meeting, May 2,
2019</span></h2>
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<p>Present:
</p>
<ul>
<li> <b> FIU: </b> Mahmoud Kamel</li>
<li> <b> JLab: </b> Mark Ito (chair), Simon Taylor,
Beni Zihlmann</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/erwvt/">recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to authenticate.
</p>
<h3><span class="mw-headline" id="Efficiency">Efficiency</span></h3>
<p>Mahmoud reported that Thomas Britton asked him for
efficiency numbers for the start counter as part of his
presentation to the Workshop on Comparison of Data and
Monte Carlo at the Collaboration Meeting. Mahmoud plans
to generate efficiency as a function of <i>z</i> for
recent data. He is hoping for the best as the code has
not been run for several months.
</p>
<h3><span class="mw-headline" id="SiPM_Dark_Current">SiPM
Dark Current</span></h3>
<p>Beni looked a bit more at the data collected during the
last run. There are slight variations counter to
counter. From the beginning to the end of the run he
sees slight degradation, but not enough to cause
concern.
</p>
<p>He recommends that we keep an eye on the dark current,
especially with the upcoming run at high intensity. We
should get into the habit of taking data to check the
dark rate.
</p>
<p>On a related issue, Beni notes that the nominal rates
per paddle have been 300 kHz. If we double the
intensity, that would present a challenge to the
counters.
</p>
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