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<p>Please find the minutes below and <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_June_13,_2017#Minutes">on
the wiki</a>.</p>
<p>______________</p>
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<h2><span class="mw-headline" id="Minutes">Minutes</span></h2>
<p>Present:
</p>
<ul>
<li> <b>FSU</b>: Sasha Ostrovidov</li>
<li> <b>JLab</b>: Thomas Britton, Brad Cannon, Eugene
Chudakov, Mark Ito (chair), Simon Taylor, Beni Zihlmann</li>
</ul>
<p>There is a <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/ytbmb/">recording of this
meeting</a> on the BlueJeans site.
</p>
<h3><span class="mw-headline"
id="Review_of_minutes_from_the_previous_meeting">Review
of minutes from the previous meeting</span></h3>
<p>We went over the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_May_30,_2017#Minutes"
title="GlueX TOF Meeting, May 30, 2017">minutes from May
30</a>.
</p>
<p>Beni mentioned that although he completed calibration
pass through the Spring 2017 data with fine run
segmentation, he has not revised the calibrations
constants, derived from a previous pass, in the CCDB. We
are very close to the final configuration for the next
launch and there have been no problems reported with the
current set of constants. His current plan is to hold off
on updating the CCDB for now.
</p>
<h3><span class="mw-headline" id="Calibration_Status">Calibration
Status</span></h3>
<p>Brad and Beni have been reviewing our calibration
procedures. Two areas could potentially improve
performance.
</p>
<h4><span class="mw-headline" id="Time-Walk_Correction">Time-Walk
Correction</span></h4>
<p>Beni is switching to a scheme where pulse amplitude is
used in the walk correction rather than pulse integral
area.
</p>
<p>The current functional form does not do a great job of
fitting the data. Beni is trying a fit to two independent
regions of time vs. amplitude to get a better
representation of the data. The next step is testing to
see if there is any improvement.
</p>
<h4><span class="mw-headline" id="Energy_Calibration">Energy
Calibration</span></h4>
<p>Brad is looking into a repeat of our energy calibration.
Though the energy measurement from the TOF is not a
critical quantity, the calibration has not been done for a
while and needs an update.
</p>
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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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