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<p>Folks,</p>
<p>Please find the minutes below and by clicking <a
moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_July_26,_2018#Minutes">here</a>.</p>
<p> -- Mark</p>
<p>__________________</p>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Minutes, GlueX Start Counter Meeting, July 26,
2018</span></h1>
<div id="bodyContent" class="mw-body-content">Present:
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<ul>
<li> <b> FIU: </b> Werner Boeglin, Mahmoud Kamel</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/lvjhe/%E2%80%8E">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_July_12">Review
minutes from the meeting on July 12</span></h3>
<p>We went over <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_July_12,_2018#Minutes"
title="GlueX Start Counter Meeting, July 12, 2018">the
minutes</a>.
</p>
<p>Mahmoud talked to Sean Dobbs about updating the CCDB
with the new propagation time corrections. Sean would
prefer to leave the constants alone for now since the
upcoming reconstruction launch is so close. Mahmoud is
prepared to do the update for 2017 and 2018 at any time.
</p>
<h3><span class="mw-headline"
id="Time_Resolution_as_a_Function_of_Position">Time
Resolution as a Function of Position</span></h3>
<p>Mahmoud showed <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/talks/2018/SC_Meeting07_26_2018.pdf">slides</a>
presenting his latest work on measuring the time
resolution of the start counter as a function of
position along the counter. These values can be used in
mcsmear in favor of a single smearing constants as has
been done before. Please see his slides for plots and
the details.
</p>
<p>He has settled on a four-region parametrization of the
resolution. He is using this rather than a three-region
version since the 2018 data shows some variation in the
straight section not seen in 2017.
</p>
<h3><span class="mw-headline" id="NIM.2FTDR">NIM/TDR</span></h3>
<p>Both Werner and Mark spoke with Eric Pooser yesterday.
He has been sidetracked with requests from Hall A/C
management but will be able to return to working on the
paper soon.
</p>
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<li id="lastmod"> This page was last modified on 27 July 2018,
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<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
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