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<p>Please find the minutes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_August_22,_2017#Minutes">https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_August_22,_2017#Minutes</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>: Brad Cannon, Sasha Ostrovidov</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/Bi_oO/">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 looked at the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_July_11,_2017#Minutes"
title="GlueX TOF Meeting, July 11, 2017">minutes from July 11</a>.
</p>
<p>The HV mainframe that Paul identified on his trip to JLab is
ready to go, pending signature on the shipping authorization
form.
</p>
<h3><span class="mw-headline" id="Calibration_Status">Calibration
Status</span></h3>
<h4><span class="mw-headline" id="Time_Calibration">Time
Calibration</span></h4>
<p>Beni gave a report.
</p>
<ul>
<li> The new timing calibration, using the pulse amplitudes
rather than the pulse integrals are now being used in the
default version of the software.</li>
<li> Last week, new tables were added to the MC variation. The
code was complaining about a lack of constants even though
they are not needed for simulated data.</li>
<li> Paul Mattione reported that in the plot of t<sub>TOF</sub>−t<sub>RF</sub>
vs. momentum there is a 300 ps. offset. Beni checked that with
the old calibration, there was still an offset of 100 ps.</li>
<li> Sean Dobbs reported that the new constants introduced an
offset in the times of the TDCs relative to corresponding ADC
time. Beni is doing a new channel-by-channel calibration which
is in progress. Since the calibration requires tracking and
retrieval of files from the tape library, this is taking a
while to get through (time scale weeks).</li>
<li> After this final calibration step is done, the next items
are to
<ol>
<li> clean up the code</li>
<li> update the documentation</li>
</ol>
</li>
<li> Runs 30,000-30,274 had no TOF calibration constants
defined. Although there are no real runs in this range, Beni
assigned constants in case simulated data needs them.</li>
</ul>
<p>At tomorrow's Analysis Meeting Beni will present the results of
his TOF efficiency study, based on material already published in
the wiki.
</p>
<h4><span class="mw-headline" id="Energy_Calibration">Energy
Calibration</span></h4>
<p>Brad will give us a report at the next meeting.
</p>
</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>
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