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<p>Folks,</p>
<p>Please find the notes <a moz-do-not-send="true" href="https://halldweb.jlab.org/wiki/index.php/%CE%A0_polarizability_Meeting_Aug_18,_2021#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p> ___________________________________</p>
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<h2 id="firstHeading" class="firstHeading" lang="en"><span dir="auto">Π polarizability Meeting Aug 18, 2021, </span><span class="mw-headline" id="Minutes">Minutes</span></h2>
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<p>Present: Alex Austregesilo, Mark Ito (chair), David
Hornidge, Ilya Larin, David Lawrence, Naomi Jarvis,
Ebode Onyie, Andrew Schick, Simon Taylor
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<h3><span class="mw-headline" id="AI_and_CDC_HV_Test.2C_Naomi">AI and CDC HV Test,
Naomi</span></h3>
<ul>
<li> Use AI to stabilize chamber gain</li>
<li> Employ more variables than just atmospheric
pressure, e.g., beam flux</li>
<li> Expect changes of ±20 V</li>
<li> Changes only at the start of run</li>
<li> Changes must be approved by shift person</li>
<li> In addition to dE/dx, time-to-distance relationship
can change with pressure</li>
<li> Will come back at a future meeting to give more
complete exposition</li>
<li> Preview her slides <a rel="nofollow" class="external text" href="https://halldweb.jlab.org/DocDB/0052/005221/001/AIEC_HV_plans.pdf">here</a>.</li>
</ul>
<h3><span class="mw-headline" id="BH_Generator_Comparisons.2C_Andrew">BH Generator
Comparisons, Andrew</span></h3>
<ul>
<li> Compares Richard's generator to Rory's. See his
slides <a href="https://halldweb.jlab.org/wiki/images/f/f1/Simple_Comparisons_between_Richard_and_Rory.pdf" class="internal" title="Simple Comparisons between
Richard and Rory.pdf">here</a>.</li>
<li> Generally good agreement, differences in the
details.</li>
<li> Asymmetry in azimuthal distribution between 0-π vs.
π-2π visible in Richard's model, similar to data.</li>
</ul>
<h3><span class="mw-headline" id="Plugin_for_.CF.80.2F.CE.BC_studies_with_muon_chambers.2C_Andrew">Plugin
for π/μ studies with muon chambers, Andrew</span></h3>
<ul>
<li> Working on it, will pass data to David L. and
Kishan.</li>
</ul>
<h3><span class="mw-headline" id="Chamber_Testing_at_JLab.2C_Alex">Chamber Testing
at JLab, Alex</span></h3>
<ul>
<li> Taking data for a week now, 40 million events
collect thus far</li>
<li> Albert will be analyzing data</li>
<li> Andrew has passed system for decoding EVIO chamber
data from David L. from 2015 on to Albert</li>
</ul>
<h3><span class="mw-headline" id="Cable_shielding_sleeve_grounding.2C_Alex">Cable
shielding sleeve grounding, Alex</span></h3>
<ul>
<li> Asked about plan for grounding of chambers at JLab</li>
<li> In advance of coming to JLab next week, Andrew will
ask Rory about the scheme. He may be doing the job
himself when he arrives.</li>
</ul>
<h3><span class="mw-headline" id="Next_Meeting_Time.2C_All">Next Meeting Time, All</span></h3>
<p>We agreed to meet in a week at 10 am again.
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