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Folks,<br>
<br>
Find the minutes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_September_8,_2015#Minutes">https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_September_8,_2015#Minutes</a>
.<br>
<br>
-- Mark<br>
___________________________________________________<br>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX TOF Meeting, September
8, 2015, </span><span class="mw-headline" id="Minutes">Minutes</span></h1>
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lang="en">
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Present:</p>
<ul style="list-style-type: square;">
<li><b>FSU</b>: Hussein Al Ghoul, Brad Cannon, Paul
Eugenio, Sasha Ostrovidov, Aristeidis Tsaris</li>
<li><b>JLab</b>: Mark Ito (chair), Simon Taylor, Beni
Zihlmann</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Announcements">Announcements</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">The run date is likely to be in
December, though nothing is certain.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Review_of_minutes_from_August_25">Review of minutes
from August 25</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We looked at the<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_August_25,_2015#Minutes"
title="GlueX TOF Meeting, August 25, 2015" style="color:
rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes</a>.</p>
<h4 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="ADC_charge_resolution_and_NSB.2FNSA">ADC charge
resolution and NSB/NSA</span></h4>
<ul style="list-style-type: square;">
<li>Beni updated his plots and<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://logbooks.jlab.org/entry/3350286"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">posted them in the logbook</a>.
He also included an example of a fit to the MIP peak and
an example waveform.</li>
<li>Sasha asked about conclusions drawn from the study.
Beni thought we should probably leave NSB at 5 but
shorten NSA from 50 to 30.</li>
<li>Sasha was concerned about the effect on large pulses
when the tail is cut-off, for example when studying
attenuation. Beni pointed out that in the limit that all
pulses are the same shape (geometrically similar) the
small pulses have the same fraction of tail area cut
out.</li>
</ul>
<h4 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Gain_vs._High_Voltage">Gain vs.
High Voltage</span></h4>
<ul style="list-style-type: square;">
<li>Gains measured at FSU were all done at 1750 V. We
might want to measure the exponent of the dependence of
gain on HV with the installed system. Sasha is going to
try and do that.</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Cosmic_Running_in_the_Hall">Cosmic
Running in the Hall</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sasha talked to Sascha Somov today.
He (Somov) will get the TOF stand-alone trigger going
sometime today.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Calibration_Automation">Calibration
Automation</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Brad is completely done with the
system for running timing calibration jobs. He sent his
constants to Beni and he put them in a private calibration
variation. Using the constants reproduced essentially the
same resolution those Beni had obtained some time ago.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We would like to run the system on
new data as soon as it becomes available. We might think
of an online system as well. Unfortunately the method
depends on having beam data; cosmic data is not useful for
this purpose.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="DTOFHitFactory">DTOFHitFactory</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Beni has been looking at the code. He
sees that there is a configuration parameter that can be
set to analyze cosmic data, that could change values.
Aristeidis implemented this branch of analysis in the
early installation and testing weeks. We need to evaluate
whether we want to continue to maintain it.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Energy_Calibration">Energy
Calibration</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Beni continues to look at attenuation
and gain calibration issues.</p>
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