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<h1 class="firstHeading">Minutes of the January 26 meeting</h1>
<h3 id="siteSub">From Lowqwiki</h3>
<p>Present: Rafayel, Yohann, F.-X., Carlos, Stepan, Hovanes, Bayram. </p>
<p>On the phone: Raphael, Marc, Raffaella, Eric
</p>
<p>Notes by Hovanes. </p>
<p><br>
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<h2>Contents</h2>
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<li class="toclevel-1"><a href="http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#RTPC_Calibrations">1 RTPC Calibrations</a></li>
<li class="toclevel-1"><a href="http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#DC_calibrations">2 DC calibrations</a></li>
<li class="toclevel-1"><a href="http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#CLAS_tracking_pattern_library_file">3 CLAS tracking
pattern library file</a></li>
<li class="toclevel-1"><a href="http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#Other">4 Other</a></li>
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<h2> RTPC Calibrations </h2>
<dl>
<dd> Raphael presented his <a href="http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/RTPC_Calibration"> plans for RTPC calibrations</a> and
discussed various options.
<ul>
<li> Main plan is to use the elastic runs to calibrate the drift
time parameters. </li>
<li> Reducing the noises is very important. Raphael has a list of
noisy channel. </li>
<li> Stepan suggested to use the source to monitor the stability
of the gains of RTPC. </li>
</ul>
</dd>
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<dd> Yohann presented <a href="http://clasweb.jlab.org/rungroups/lowq/wiki/images/c/c8/PerrinRTPC012610.pdf"> his vision for RTPC
calibrations</a>. The two schemes for drift time parameters
calibrations are similar.
<ul>
<li> Yohann had an interesting suggestion to calibrate the gains
of pads. </li>
<li> The proposed solution involved inverting a matrix with 3200
columns which caused some doubts about about viability of that
solution. </li>
<li> Carlos suggested solving the problem of determining the
gains using statistical methods, for instance fitting for the 3200
parameters. </li>
</ul>
</dd>
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<dl>
<dd> There will be a separate meeting on Thursday at 9:30am in F228
to discuss the details of the RTPC calibrations and software.
</dd>
</dl>
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<h2> DC calibrations </h2>
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<dd> The problem with the TBID bank was resolved.
</dd>
<dd> Proton and local angle cuts produce a good data sample to
perform a fit. </dd>
<dd> Bayram is close to completing the first iteration. </dd>
</dl>
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<h2> CLAS tracking pattern library file </h2>
<dl>
<dd> eg6 needs a separate PRLINK file since it has a long target
upstream of CLAS
</dd>
<dd> Stepan has a program and all fields to generate the library. </dd>
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<h2> Other </h2>
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<dd> We probably need to return three RCU to CERN. Raffaella will
find out which pieces of electronics which were borrowed should be
returned, and she will let Stepan know.
</dd>
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