<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Colleagues,</p>
<p>Please find the minutes of today's meeting reproduced below and
on the web at</p>
<p>
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_11,_2018#Minutes">https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_11,_2018#Minutes</a>
.</p>
<p> - Mark</p>
<p>____________________________________</p>
<p>
</p>
<div id="globalWrapper">
<div id="column-content">
<div id="content" class="mw-body" role="main">
<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX Start Counter Meeting, January 11, 2018</span><span
class="mw-headline" id="Minutes">, Minutes</span></h2>
<div id="bodyContent" class="mw-body-content">
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<p>Present:
</p>
<ul>
<li> <b> FIU </b>: Mahmoud Kamel</li>
<li> <b> JLab </b>: Thomas Britton, Mark Ito (chair)</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/vMWCP">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="Announcements">Announcements</span></h3>
<ul>
<li> Beam arrived in the Hall this morning.</li>
</ul>
<h3><span class="mw-headline"
id="Raw_Hit_Rate_vs._Photon_Flux">Raw Hit Rate vs.
Photon Flux</span></h3>
<p>Thomas reported that the rate of raw hits in the start
counter seems to scale reasonably well with photon flux.
He has been studying this for all detector systems. See
[[January_10,_2018,_Analysis_Working_Group#Analysis_Focus:_Total_Cross_Sections.2C_Acceptance_Corrections|minutes
of yesterday's Analysis Meeting].
</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_Start_Counter_Meeting,_November_16,_2017#Minutes"
title="GlueX Start Counter Meeting, November 16, 2017">minutes
from November 16</a>. Mahmoud noted that he found the
bggen events that Thomas has generated and used them for
his comparisons of MC and data.
</p>
<h3><span class="mw-headline"
id="Calibration_and_Efficiency">Calibration and
Efficiency</span></h3>
<p>We went over <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2017/sean_st_issues.pdf">Sean
Dobbs's list of start counter issues</a> from
November.
</p>
<ul>
<li> Mahmoud has been looking at bggen data (as
mentioned above) and comparing MC and data.</li>
<li> Work on resolution as a function of momentum has
not been reported.</li>
<li> Mahmoud sent Sean some results on the time
resolution as a function of z.</li>
<li> Progress on alignment has not been reported.</li>
</ul>
<h3><span class="mw-headline"
id="Collaboration_Meeting_Discussion">Collaboration
Meeting Discussion</span></h3>
<p>Mahmoud will give a short update on
calibration/efficiency/performance at the upcoming <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX-Collaboration-Feb-2018"
title="GlueX-Collaboration-Feb-2018">Collaboration
Meeting</a>.
</p>
<h3><span class="mw-headline" id="NIM.2FTDR">NIM/TDR</span></h3>
<p>A draft of the NIM paper has been <a rel="nofollow"
class="external text"
href="https://mailman.jlab.org/mailman/private/gluex-collaboration/2017-December/004717.html">circulated
to the collaboration</a>. the deadline for feedback
has passed, but we thought that comments might still be
accepted.
</p>
<h3><span class="mw-headline"
id="Meeting_time:_is_10_am_OK">Meeting time: is 10 am
OK</span></h3>
<p>Mark has a schedule conflict and proposed meeting at 10
am rather than 11:00 or 11:30 am. All agreed that this
is acceptable. Mark will make and announce the change.
</p>
</div>
</div>
</div>
</div>
</div>
<pre class="moz-signature" cols="72">--
Mark Ito, <a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, (757)269-5295
</pre>
</body>
</html>