<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Folks,</p>
<p>Please find the minutes <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_March_5,_2020">here</a>
and below.</p>
<p> -- Mark</p>
<p>
</p>
<div id="globalWrapper">
<div id="column-content">
<div id="content" class="mw-body" role="main">
<h2 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">GlueX Start Counter Meeting, March 5, 2020, </span><span
class="mw-headline" id="Minutes">Minutes</span></h2>
<div id="bodyContent" class="mw-body-content">
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<p>Present:
</p>
<ul>
<li> <b> FSU: </b> Sean Dobbs</li>
<li> <b> JLab: </b> Rupesh Dotel, Tolga Erbora, Mark
Ito, Simon Taylor, Beni Zihlmann</li>
</ul>
<p>There is <a rel="nofollow" class="external text"
href="https://bluejeans.com/s/C9Djj/">a recording of
this meeting</a> on the BlueJeans site. Use your JLab
credentials to gain access. </p>
<h3><span class="mw-headline"
id="Review_minutes_from_the_last_meeting">Review
minutes from the last meeting</span></h3>
<p>We looked at <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_February_6,_2020#Minutes"
title="GlueX Start Counter Meeting, February 6, 2020">the
minutes from the February 6</a> without significant
comment.
</p>
<h3><span class="mw-headline"
id="Calibration_and_Efficiency">Calibration and
Efficiency</span></h3>
<p>Rupesh presented recent work on calibrating the
propagation delay for the start counter for the current
run. See <a rel="nofollow" class="external text"
href="https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4371">his
slides</a> for the details. From his talk, before and
after calibrations plots of start counter hit time vs.
position in paddle 1.
</p>
<p><a
href="https://halldweb.jlab.org/wiki/index.php/File:Sc_calibration_rupesh.png"
class="image"><img alt="Sc calibration rupesh.png"
src="https://halldweb.jlab.org/wiki/images/thumb/8/8f/Sc_calibration_rupesh.png/512px-Sc_calibration_rupesh.png"
width="512" height="273"></a>
</p>
<p>The timing resolution he gets is about 320 ps for
150 nA running and 330 ps for 350 nA running. Jobs take
a long time to run because he needs a full run of
statistics and tracking must be done to get a position
along the start counter paddle.
</p>
<p>Rupesh will update constants in the CCDB and re-do the
calibrations periodically to check stability.
</p>
<h3><span class="mw-headline" id="Dark_Rate_Studies">Dark
Rate Studies</span></h3>
<ul>
<li> Beni took some data earlier this week. Stay tuned
for results...</li>
<li> Young collaborators from Miami will look into
taking on more responsibility in this area.</li>
</ul>
</div>
<div class="printfooter">
Retrieved from "<a dir="ltr"
href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_Start_Counter_Meeting,_March_5,_2020&oldid=97113">https://halldweb.jlab.org/wiki/index.php?title=GlueX_Start_Counter_Meeting,_March_5,_2020&oldid=97113</a>"</div>
</div>
</div>
</div>
<div id="footer" role="contentinfo">
<ul id="f-list">
<li id="lastmod"> This page was last modified on 7 March 2020,
at 19:32.</li>
</ul>
</div>
</div>
</body>
</html>