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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,_2021#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p> _________________________________</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX TOF Meeting, April 8, 2021, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Eugene Chudakov, Paul Eugenio, Mark Ito
(chair), Simon Taylor, Tim Whitlatch, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/fMH4UnxOJx3/">recording
of this meeting</a>. Log into the <a rel="nofollow"
class="external text"
href="https://jlab.bluejeans.com">BlueJeans site</a>
first to gain access (use your JLab credentials).
</p>
<p>We discussed PMT repair.
</p>
<ul>
<li> Beni has identified two PMTs that he would like to
replace. During the last run he tried increasing their
HV, but that did not really fix their performance. One
of them is in the vertical plane, one in the
horizontal. The one in the vertical plane is at the
bottom of the array.</li>
<li> Paul told us the main difficulty in replacing a PMT
in situ is simply getting access to it. He does have
training on the scissor lift.</li>
<li> Paul has already purchase a new batch of the
Momentum RTV 615 used to attach PMTs to light guides.
There is some in the Hall, but he wants to use the new
stuff.</li>
<li> We discussed Paul traveling to the Lab to do the
work. He is willing to drive (avoiding a commercial
flight), he is fully vaccinated, and he is willing to
undergo any testing regime deemed necessary. Under
current Lab rules, he needs to get approval for the
trip as well as to quarantine for 14 days after he
arrives. This second point is the deal breaker. Eugene
will look into the possibility nonetheless. Paul will
send him a message describing the situation, for
reference.</li>
<li> Paul would like to spend a week at JLab, not only
to do the repairs, but also to look at a possibly
damaged light guide. His schedule is flexible (he is
not teaching this semester).</li>
<li> If Paul cannot travel then the job can be done with
local staff, of course. Perhaps with video-based
guidance from Tallahassee.</li>
<li> Tim reported that there is presently no schedule
constraints on when the work should be done.</li>
<li> In any case, Tim will get a member of the technical
staff to train on the PMT replacement procedure.</li>
<li> We agreed that it would be best if we could get the
work done before the end of May. We would not want to
delay until July.</li>
<li> Conditions and policies may or may not change over
the next weeks/months. We decided to continue to
explore options on when/how to do the work.</li>
</ul>
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