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<p>Folks,</p>
<p>Please find the notes below and <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_January_7,_2019">here</a>.</p>
<p> -- Mark</p>
<p>_____________________________</p>
<p> </p>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Hall D Staff Meeting, January 7, 2019</span></h1>
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<div id="siteSub">From Gluex PRIVATE Wiki</div>
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lang="en">
<p>Present: Alex Austregesilo, Eugene Chudakov (chair), Mark
Dalton, Alexandre Deur, Hovanes Egiyan, Sergey Furletov,
Mark Ito, Lubomir Pentchev, Patrizia Rossi, David Lawrence,
Elton Smith, Sascha Somov, Simon Taylor
</p>
<h3><span class="mw-headline" id="Patrizia">Patrizia</span></h3>
<ul>
<li> Need slides from Eugene for Users Group Board of
Directors meeting. He has already sent them in.</li>
</ul>
<h3><span class="mw-headline" id="Eugene">Eugene</span></h3>
<ul>
<li> Today is Alexander's last day as JLab Staff. He is
transitioning to CMU, but will retain the same office, job
description, and overall demeanor as before.</li>
<li> A new staff position was promised to us quite some time
ago. Status unknown.</li>
<li> Position of Hall D Work Coordinator remains open.
Places additional load on Tim Whitlatch</li>
<li> Appraisals out for signatures by appraisees.</li>
<li> This calendar year we have two running periods
<ul>
<li> 68 days starting Jan. 30
<ul>
<li> first two weeks for DIRC commissioning, the
balance PrimEx-η</li>
</ul>
</li>
<li> 38 days starting Nov. 11</li>
</ul>
</li>
<li> Activities in the Hall
<ul>
<li> Today one quartz window for the DIRC arrived
<ul>
<li> another to come</li>
<li> Next item: electronics, should be done by
Monday</li>
<li> Then: install one optical box</li>
<li> Then: the other optical box</li>
<li> Schedule is tight, one optical box a <b>must</b></li>
<li> all four bar boxes are installed on the frame</li>
<li> DIRC testing at high intensity for some days
(2.5 × Fall 2018 intensity)</li>
<li> Target will stay in for DIRC commissioning</li>
</ul>
</li>
<li> Richard Jones and Jim McIntyre here from UConn to
install new microscope fibers</li>
<li> will test magnet in two weeks
<ul>
<li> cryostat will have 1.5 cubic meters more helium
than in years past!</li>
</ul>
</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Elton">Elton</span></h3>
<ul>
<li> Time desired for CPP tests
<ul>
<li> David has a plan, Tim has been consulted</li>
</ul>
<ol>
<li> passive shielding in front of TOF, lead</li>
<li> high-Z target</li>
<li> trigger studies</li>
</ol>
<ul>
<li> during DIRC commissioning, magnet will be on,
cannot use crane to install shielding</li>
</ul>
</li>
<li> calorimeter efficiency
<ul>
<li> Chinese collaborators have new method looking at
angle in COM frame for π<sup>0</sup> decays</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Alexandre">Alexandre</span></h3>
<ul>
<li> will start bi-weekly run coordination meetings</li>
</ul>
<h3><span class="mw-headline" id="Sascha">Sascha</span></h3>
<ul>
<li> CompCal
<ul>
<li> successful beam test completed</li>
<li> measured rates/cell, trigger rate</li>
<li> operated at low PMT voltage, gain of base-resident
amplifier higher than preference</li>
</ul>
</li>
<li> PrimEx run: target sequence needs decision soon
<ul>
<li> most likely: Be first, then L<sup>4</sup>He</li>
</ul>
</li>
<li> DIRC
<ul>
<li> two SSP's installed today
<ul>
<li> a lot of parameters</li>
</ul>
</li>
<li> crate can be read out, some residual problems</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Mark_I.">Mark I.</span></h3>
<ul>
<li> Justin Stevens has proposal for merging DIRC
reconstruction branches into the master branch
<ul>
<li> will discuss at tomorrow's software meeting</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Thomas">Thomas</span></h3>
<ul>
<li> monitoring for DIRC and CompCal will be ready to go</li>
</ul>
<h3><span class="mw-headline" id="Lubomir">Lubomir</span></h3>
<ul>
<li> greenish contamination found in defective mass flow
controller sent back to the manufacturer
<ul>
<li> CDC only</li>
<li> at end of run 60 μm filter installed in line,
inspection to come soon</li>
<li> MFC replaced with rotometer</li>
</ul>
</li>
<li> gas chromatographer has arrived
<ul>
<li> forming plan for installation</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Hovanes">Hovanes</span></h3>
<ul>
<li> DIRC controls
<ul>
<li> working on controls for optical box (interlocks,
temperatures)</li>
<li> bar box controls already running</li>
<li> voltage controls ready, not hooked to supplies yet</li>
<li> DIRC PMT boards have temp. readout; specs not clear</li>
<li> DIRC scalers need read-out as well</li>
</ul>
</li>
</ul>
<h3><span class="mw-headline" id="Alex_A.">Alex A.</span></h3>
<ul>
<li> Spring 2018 reconstructed started
<ul>
<li> 35 runs spread throughout run, 5% of data, done</li>
<li> there are still minor timing issues in FCAL, have
to be checked channel-by-channel, run-by-run</li>
<li> will look into whether gain constants for inner
FCAL blocks are included in current constants</li>
</ul>
</li>
</ul>
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