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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,_January_27,_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, January 27, 2021, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
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lang="en">
<p>Present: Eugene Chudakov, Mark Ito (chair), Sasha
Ostrovidov, Susan Schadmand, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/8GZxYxK2JpK/">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>
<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,_January_13,_2021#Minutes"
title="GlueX TOF Meeting, January 13, 2021">minutes
from January 13</a> without significant comment.
</p>
<h3><span class="mw-headline" id="PMT_Repair">PMT Repair</span></h3>
<ul>
<li> Prompted by Sasha's question at the last meeting,
Beni checked on the HV settings of the tubes that are
candidates for replacement. He found that they are all
on the low side, 1210 to 1290 V. Based on that, he
thinks that we should replace only two of the PMTs
(PMTs 69 and 113) rather than the five he identified
last time.</li>
<li> Sasha reminded us that all of the single-ended,
new-in-TOF-II modules have the end surface near the
beam hole blackened.</li>
<li> Sasha told us that Paul Eugenio is willing to come
up to the Lab to do the replacement, but the required
two-week quarantine makes that impractical.</li>
<li> The tubes will be replaced in situ (no need to
remove the entire array from the forward carriage).</li>
<li> Beni proposed practicing PMT replacement on one of
the unused modules in the Hall.</li>
<li> Mark suggested that as we learn how to do the
replacement, we also train a member of the technical
staff on the task.</li>
</ul>
<h3><span class="mw-headline" id="TOF_II_Trigger">TOF II
Trigger</span></h3>
<p>Beni ran down the activity in progress on standing up a
trigger with TOF II.
</p>
<ul>
<li> We want to present progress at the CPP/NPP
readiness review.</li>
<li> Hai Dong told Beni that all changes necessary to
support the TOF II geometry can be done in the crate
trigger processor (CTP). Nothing upstream of the CTP
need be modified.</li>
<li> Hai has written up a work plan. Elton presented it
at the CPP meeting this morning.
<ul>
<li> The work will take 4 weeks.</li>
<li> 2 to 3 weeks will be needed for bench testing.</li>
<li> Sascha Somov will have to test the system in
the Hall after that, either with cosmics or (most
likely) with beam.</li>
</ul>
</li>
<li> The plan puts us on track for having the system
ready for beam tests before the August run.</li>
<li> Beni and Mark will meet to confirm channel
assignments as transmitted to Hai. Mark has the map
that was used to create translation tables that have
worked in recent data taking.</li>
</ul>
<h3><span class="mw-headline" id="TOF_NIM_paper">TOF NIM
paper</span></h3>
<p>No known progress.
</p>
<h3><span class="mw-headline" id="Action_Item_Recap">Action
Item Recap</span></h3>
<ol>
<li> Decide on when to ship PMTs to JLab from FSU (Mark,
Paul Eugenio)</li>
<li> Prepare a complete draft of the TOF NIM paper.
(all)</li>
<li> Make a plan for TOF repair during the SAD,
including Paul in the discussion. (all)</li>
<li> Renew the equipment loan agreement between JLab and
FSU (Mark, Paul)</li>
</ol>
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