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<p>Folks,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_8,_2020#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX TOF Meeting, April 8, 2020, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Edmundo Barriga, Eugene Chudakov, Paul
Eugenio, Mark Ito (chair), Simon Taylor, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/OyxUT/">recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to gain access.
</p>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_last_meeting">Review of
minutes from the last meeting</span></h3>
<p>We went over the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_March_11,_2020#Minutes"
title="GlueX TOF Meeting, March 11, 2020">minutes from
March 11</a>. Beni reminded us that changing out the
FADC fixed the issue seen in the monitoring plots that
we were dealing with at the time.
</p>
<h3><span class="mw-headline" id="Calibration">Calibration</span></h3>
<p>Beni reported that the calibration effort for the last
runs of the recent running period were stalled due to
lack of TOF root files. Sean got those jobs started
again on Monday, they are starting to come in, and Beni
has been processing them. He noted that the calibrations
for the beginning of the run have been complete for some
time and the reconstruction of those runs is not holding
on TOF constants.
</p>
<p>Beni also performed calibrations for the PrimEx running
period. Only a few of the runs can be tested since the
test requires tracking. For the runs that he was able to
check, the resolutions looks good.
</p>
<h3><span class="mw-headline" id="Software_Issues">Software
Issues</span></h3>
<p>Igal Jaegle has reported seeing "stripes" in the
spatial distribution of charged tracks matched to the
TOF that look like they are correlated with vertical
counters in the downstream layer of the TOF. Simon and
Beni are helping him understand the anomaly.
</p>
<h3><span class="mw-headline" id="TOF_NIM_paper">TOF NIM
paper</span></h3>
<p>Paul reported that work continues on the paper. Sasha
Ostrovidov is working on the section on testing.
</p>
<p>Beni reminded us of the <a rel="nofollow"
class="external text"
href="https://www.overleaf.com/project/5d5fe70448badb5a9fff112e">location
of the Overleaf site</a>.
</p>
<h3><span class="mw-headline"
id="PMT_Replacement_Capability">PMT Replacement
Capability</span></h3>
<p>Paul reminded that the last time he was a JLab, he
brought up a fixture for replacing TOF PMTs <i>in situ</i>.
He has initiated the project to make six of them;
materials have been ordered.
</p>
<p>Beni says some PMTs may need replacement soon. One in
particular is worrisome. Beni will go through the PMTs
individually and assess viability.
</p>
<h3><span class="mw-headline" id="Health">Health</span></h3>
<p>All participants reported that they are in good health.
</p>
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