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<p>Correction to clarification 2, it should read:<br>
</p>
<p>For both simulations the two geometry arrangements were (1) with
shield, without DIRC and (2) without shield, with DIRC.</p>
<div class="moz-cite-prefix">On 2/13/19 12:37 PM, Mark Ito wrote:<br>
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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,_February_13,_2019#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p>_____________________________________</p>
<p> </p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX TOF Meeting Minutes, February 13, 2019</span></h2>
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<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
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<p>Present: </p>
<ul>
<li> <b> FSU: </b> Sasha Ostrovidov</li>
<li> <b> JLab: </b> Thomas Britton, Ashley Ernst,
Mark Ito (chair), Simon Taylor, Beni Zihlmann</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbluejeans.com%2Fs%2Foxwox%2F&data=02%7C01%7Cmarki%40jlab.org%7C6481c56ecb234ed16e8708d691da0075%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636856762829889999&sdata=5NkwLAmMq1SvP8mFJzWT0rBxiKt8klaA7qpG0OAL7MA%3D&reserved=0"
originalsrc="https://bluejeans.com/s/oxwox/"
shash="z9ZdIhLrOvHfe4CNDu9sKjg4JgBBhqSbZ6AgpLQ3FicSjjPLBAHb5zAibihux251fOs/sSlDxBYh3/RuvVO7jXm/WRy1ErURDC4U7WgZE6rfJElh8vkDSlZOVk2+/8SruS73/XwzveI7fcig1s79U2KgpwZZuvdkcUmgqZpSfyQ="
moz-do-not-send="true">recording of this meeting</a>
on the BlueJeans site. Use your JLab credentials to
access it. </p>
<h3><span class="mw-headline"
id="Announcement:_Machine_Learning_and_the_TOF">Announcement:
Machine Learning and the TOF</span></h3>
<p>Thomas told us that ML-based online monitoring needs
experts to label histograms. He has conscripted Beni
to do so for the Time-of-Flight. The automatic system
is trained on PNG files from the online monitoring
program. It is doing well on the FCAL occupancy plots,
with a false positive rate of less than 2%. Colin
Gleason did the training for the FCAL in 20 to 30
minutes. </p>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_January_30_meeting">Review
of minutes from the January 30 meeting</span></h3>
<p>We went over the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_January_30,_2019#Minutes"
title="GlueX TOF Meeting, January 30, 2019"
moz-do-not-send="true">minutes from last time</a>. </p>
<ul>
<li> Mark reported that Tim Whitlatch is going to <b>get
a designer</b> (probably Stephanie Worthington) <b>going
on Paul's upgrade ideas</b> sometime in the next
few weeks.</li>
<li> On Monday, Mark and Ashley made a <b>tagged
release of HDDS</b> with (a) the Lucite shielding,
(b) <b>no DIRC,</b> and (c) overlaps resolved. They
leveraged Richard Jones additions and corrections to
Ashley's initial draft of the shielding. The release
was produced by using version 3.13 as a base and
importing HDDS XML files from the CCDB for run
41000, i. e., a pre-DIRC run.</li>
</ul>
<h3><span class="mw-headline"
id="Lucite_Shield_Geometry">Lucite Shield Geometry</span></h3>
<p>Ashley ran us through slides from Richard that
detailed his validation of the shield geometry. He
identified and performed three classes of verification
(slide 4): </p>
<ol>
<li> alignment verification (look at pictures)</li>
<li> geometry verification (checks proper embedding,
overlaps)</li>
<li> functional verification (run HDGeant4 and analyze
hits)</li>
</ol>
<p>Please see <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2019/tof_shielding_sim-2-2019.pdf"
moz-do-not-send="true">his slides</a> for the
details and the plots. </p>
<p>Added in press: Ashley reported some clarifications
she obtained from Richard. </p>
<ol>
<li> There is a swap in plot positions between the low
energy photon simulation. and the coherent
bremsstrahlung beam simulation. The former shows the
situation with shielding on the left and without
shielding on the left. The latter is the reverse.</li>
<li> The DIRC was present in all simulations.</li>
</ol>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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