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<p>Folks,</p>
<p>Please find the minutes below and at this <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_October_18,_2018#Minutes">link</a>.</p>
<p> -- Mark</p>
<p>_____________________________________</p>
<p>
</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Minutes, GlueX Start Counter Meeting, October
18, 2018</span></h2>
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<p>Present:
</p>
<ul>
<li> <b> FIU: </b> Werner Boeglin, Mahmoud Kamel</li>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Thomas Britton, Mark Ito (chair),
Simon Taylor, Beni Zihlmann</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/gyEw8">recording of this
meeting</a> on the <a rel="nofollow" class="external
text" href="https://jlab.bluejeans.com/">BlueJeans
site</a>. Use your JLab credentials to authenticate.
</p>
<h3><span class="mw-headline"
id="Review_minutes_from_the_meeting_on_September_20">Review
minutes from the meeting on September 20</span></h3>
<p>We went over <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_September_20,_2018#Minutes"
title="GlueX Start Counter Meeting, September 20,
2018">the minutes</a>. Regarding the simulations that
Sean had announced last time, Mahmoud used them in his
presentation at the last collaboration meeting in the
section on comparison between data and Monte Carlo.
</p>
<h3><span class="mw-headline"
id="Calibration_and_Efficiency">Calibration and
Efficiency</span></h3>
<p>Mahmoud has checked the start counter time resolution
for run 50799 of the current run period. The resolution
is nominal at around 300 ps.
</p>
<h3><span class="mw-headline" id="Work_Packages">Work
Packages</span></h3>
<p>We reviewed the PID section of the <a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/wiki-private/index.php/2018_Work_Packages">Work
Packages</a> wiki page.
</p>
<ul>
<li> As mentioned at the last TOF meeting, there still
is a place for the detector working groups to develop
raw quantities, such as timing information, that can
be used to form higher level quantities used for
particle identification.</li>
<li> There are issues remaining in this working group.
<ul>
<li> Sean: quantifying detector response as a
function of location in phase space and capturing
those measurements in the simulation and
reconstruction.</li>
<li> Werner: transmission of Mahmoud's expertise in
calibration and performance measurement to new
students.</li>
<li> Geometrical alignment studies.</li>
<li> Refinement of comparisons between simulation
and data.</li>
</ul>
</li>
<li> Need for a new particle identification working
group.
<ul>
<li> Effort is needed to formalize how we combine
PID info from various detector systems on a
collaboration-wide basis.</li>
<li> Mark: this effort could be folded into a work
package of the software working group.</li>
<li> Thomas: when bringing new students into say π/K
ID efficiency and fake rates, existing detector
working groups not appropriate. The discussion
there is much lower level.</li>
<li> Werner: there are three new grad students from
FIU, candidates for getting plugged in</li>
<li> Sean: a dedicated meeting of a new group would
be best to address this issue.</li>
<li> Werner: it would be best for a JLab person to
convene a new working group. That provides
centrality, collaboration-wise, and continuity.</li>
<li> Thomas and Mark will discuss
working-group-convening responsibilities.</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="NIM_Paper">NIM Paper</span></h3>
<p>Eric Pooser has produced a new draft incorporating
comments from Beni and Elton Smith. This is good
progress. Mark will distribute the draft to those who
commented on the previous draft. This draft has been
shortened; more edits are probably needed.
</p>
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