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<p>Folks,</p>
<p>An off-week meeting. Find the meeting page below and at
<a class="moz-txt-link-freetext" href="https://goo.gl/HU47Fj">https://goo.gl/HU47Fj</a> .</p>
<p> -- Mark</p>
<p>__________________</p>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX TOF Meeting, July 5, 2016</span></h1>
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<div id="siteSub">From GlueXWiki</div>
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lang="en">
<p>GlueX Time-of-Flight Meeting<br>
Tuesday, July 5, 2016<br>
11:00 am EDT<br>
JLab: CEBAF Center, Room F326/327
</p>
<h2><span class="mw-headline" id="Agenda">Agenda</span></h2>
<ol>
<li> Announcements</li>
<li> Review of <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_June_28,_2016#Minutes"
title="GlueX TOF Meeting, June 28, 2016">minutes
from the previous meeting</a></li>
<li> PMT Gains: The folowing plots show the signal peak
amplitude for hits that are matched to tracks<br>
the data are from different runs where we did a beam
current scan starting with 40nA and going up to 150nA.
At 40nA beam current the peak amplitudes look still
reasonable, but already at 80nA a degradation is
noticeable which becomes critical at even higher
currents(luminosities). The radiator was 50um diamond.
<ul>
<li> Run 11634 with 40nA beam current:<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run11634.gif"
class="image"><img alt="Adc peak run11634.gif"
src="cid:part2.63507FE7.44964B38@jlab.org"
srcset="/wiki/images/thumb/a/ae/Adc_peak_run11634.gif/450px-Adc_peak_run11634.gif
1.5x,
/wiki/images/thumb/a/ae/Adc_peak_run11634.gif/600px-Adc_peak_run11634.gif
2x" height="155" width="300"></a></li>
<li> Run 11635 with 80nA beam current:<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run11635.gif"
class="image"><img alt="Adc peak run11635.gif"
src="cid:part4.3899596A.ED786522@jlab.org"
srcset="/wiki/images/thumb/a/a9/Adc_peak_run11635.gif/450px-Adc_peak_run11635.gif
1.5x,
/wiki/images/thumb/a/a9/Adc_peak_run11635.gif/600px-Adc_peak_run11635.gif
2x" height="163" width="300"></a></li>
<li> Run 11637 with 110nA beam current:<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run11637.gif"
class="image"><img alt="Adc peak run11637.gif"
src="cid:part6.46279D10.3F9DD71E@jlab.org"
srcset="/wiki/images/thumb/1/1a/Adc_peak_run11637.gif/450px-Adc_peak_run11637.gif
1.5x,
/wiki/images/thumb/1/1a/Adc_peak_run11637.gif/600px-Adc_peak_run11637.gif
2x" height="164" width="300"></a></li>
<li> Run 11636 with 150nA beam current:<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run11636.gif"
class="image"><img alt="Adc peak run11636.gif"
src="cid:part8.320A1DC4.CFA6AEC8@jlab.org"
srcset="/wiki/images/thumb/f/f6/Adc_peak_run11636.gif/450px-Adc_peak_run11636.gif
1.5x,
/wiki/images/thumb/f/f6/Adc_peak_run11636.gif/600px-Adc_peak_run11636.gif
2x" height="158" width="300"></a></li>
</ul>
</li>
<li> The degradation of the PMTs over the spring run
period is illustated with the following plots shoing
the RAW ADC Signal amplitudes for an early run (run
10346) and a late run (run 11634 save as above low
current 40nA)
<ul>
<li>Raw TOF data Signal amplitude RUN 10346 (left)
track matching hits (right):<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Tofpmt_amp_raw_run10346.gif"
class="image"><img alt="Tofpmt amp raw
run10346.gif"
src="cid:part10.AAE2B22C.83C4AB87@jlab.org"
srcset="/wiki/images/thumb/c/ce/Tofpmt_amp_raw_run10346.gif/450px-Tofpmt_amp_raw_run10346.gif
1.5x,
/wiki/images/thumb/c/ce/Tofpmt_amp_raw_run10346.gif/600px-Tofpmt_amp_raw_run10346.gif
2x" height="169" width="300"></a> <a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run10346.gif"
class="image"><img alt="Adc peak run10346.gif"
src="cid:part12.55B058FA.CA5A56B7@jlab.org"
srcset="/wiki/images/thumb/9/97/Adc_peak_run10346.gif/450px-Adc_peak_run10346.gif
1.5x,
/wiki/images/thumb/9/97/Adc_peak_run10346.gif/600px-Adc_peak_run10346.gif
2x" height="154" width="300"></a></li>
<li>Raw TOF data Signal amplitude RUN 11634 (left)
track matching hits (right)::<br>
<a
href="https://halldweb.jlab.org/wiki/index.php/File:Tofpmt_amp_raw_run11634.gif"
class="image"><img alt="Tofpmt amp raw
run11634.gif"
src="cid:part14.381EC414.96A653B4@jlab.org"
srcset="/wiki/images/thumb/1/1c/Tofpmt_amp_raw_run11634.gif/450px-Tofpmt_amp_raw_run11634.gif
1.5x,
/wiki/images/thumb/1/1c/Tofpmt_amp_raw_run11634.gif/600px-Tofpmt_amp_raw_run11634.gif
2x" height="187" width="300"></a> <a
href="https://halldweb.jlab.org/wiki/index.php/File:Adc_peak_run11634.gif"
class="image"><img alt="Adc peak run11634.gif"
src="cid:part2.63507FE7.44964B38@jlab.org"
srcset="/wiki/images/thumb/a/ae/Adc_peak_run11634.gif/450px-Adc_peak_run11634.gif
1.5x,
/wiki/images/thumb/a/ae/Adc_peak_run11634.gif/600px-Adc_peak_run11634.gif
2x" height="155" width="300"></a></li>
</ul>
</li>
<li> Calibration Status</li>
<li> NIM paper: <a rel="nofollow" class="external text"
href="https://halldsvn.jlab.org/repos/trunk/publications/GlueXTOF%7C">svn
co
https://halldsvn.jlab.org/repos/trunk/publications/GlueXTOF</a></li>
</ol>
<h2><span class="mw-headline" id="Communication">Communication</span></h2>
<ul>
<li> The BlueJeans Meeting number is 350 531 998.</li>
<li> <a rel="nofollow" class="external text"
href="http://bluejeans.com/350531998">Enter
BlueJeans Meeting</a></li>
</ul>
<h3><span class="mw-headline" id="Slides">Slides</span></h3>
<p>Talks can be deposited in the directory <code>/group/halld/www/halldweb/html/talks/2016</code>
on the JLab CUE. This directory is accessible from the
web at <a rel="nofollow" class="external free"
href="https://halldweb.jlab.org/talks/2016/">https://halldweb.jlab.org/talks/2016/</a>
.
</p>
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