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Please find the minutes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_14,_2016#Minutes">https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_14,_2016#Minutes</a>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX Start Counter Meeting,
January 14, 2016,</span> Minutes</h1>
<div id="bodyContent" class="mw-body-content"><span
class="mw-headline" id="Minutes"></span>
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
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>FIU</b>: Werner Boeglin, Mahmoud Kamel</li>
<li><b>JLab</b>: Mark Ito (chair), Eric Pooser, Simon
Taylor, Beni Zihlmann</li>
</ul>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">There is a<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://bluejeans.com/s/8_WI/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">recording of this meeting</a><span
class="Apple-converted-space"> </span>on the BlueJeans
site.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Announcement">Announcement</span></h3>
<ul style="list-style-type: square;">
<li>Eric has finished writing his thesis!</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Review_of_Minutes_from_the_Last_Meeting">Review of<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_December_3,_2015#Minutes"
title="GlueX Start Counter Meeting, December 3, 2015"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">Minutes
from the Last Meeting</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We looked at the minutes from
December 3. Items of note appear on the agenda of this
meeting.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Missing_channels_in_Fall_2015">Missing
channels in Fall 2015</span></h3>
<ul style="list-style-type: square;">
<li>We reviewed the<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://logbooks.jlab.org/entry/3369430"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">log entry from Nick Sandoval</a>.
Mark will follow up with Nick on any new news.</li>
<li>Eric mentioned that he has seen this kind of
disconnect of the low voltage before when the pre-amps
were not well seated.</li>
<li>Mark spoke with Tim about Tim's idea of adding a
fixture for ensuring that the pre-amps stay plugged in.
Tim thought that even though the problem this time had
nothing to do with those connections, he is going ahead
and has assigned a designer. In light of Eric's remark,
this makes sense.</li>
<li>[Added in press] Mark talked to Nick. The low-voltage
cable checked out fine. It is back in the system. Nick
mentioned that when this kind of disconnect occurs, it
shows up as a 10% reduction in current from the power
supply. That current is monitored in EPICS; we should
alarm on it.</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Calibration_Update">Calibration
Update</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mahmoud has done a complete
calibration of the light propagation delay on a
counter-by-counter basis. The code is contained in
plug-ins appropriate for inclusion in the calibration
challenge. He measures a time resolution for the start
counter of less than 300 ps. For details, please see<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="http://argus.phys.uregina.ca/gluex/DocDB/0029/002907/001/ST_propagation_correction.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">his slides</a>.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Run_Readiness">Run Readiness</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mahmoud went through the<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="http://argus.phys.uregina.ca/gluex/DocDB/0029/002904/001/Spring_2016_RunPlan.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">slides he presented</a><span
class="Apple-converted-space"> </span>at yesterday's Run
Coordination meeting. The bias scan we did last Spring
needs to be repeated because the FADC thresholds were
changed in the middle of the scan.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Collaboration_Meeting"><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX-Collaboration-Feb-2016"
title="GlueX-Collaboration-Feb-2016" style="color:
rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">Collaboration
Meeting</a></span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We agreed that Mahmoud should present
his calibration results, pending approval from his thesis
adviser.</p>
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<li id="lastmod">This page was last modified on 16 January 2016,
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