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<p>Please find the notes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_April_17,_2017">https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_April_17,_2017</a>
.<br>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Hall D Staff Meeting, April 17, 2017</span></h1>
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<div id="siteSub">From Gluex PRIVATE Wiki</div>
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<p>Present: Thomas Britton, Eugene Chudakov (chair), Mark
Dalton, Alexandre Deur, Hovanes Egiyan, Sergey Furletov,
Mark Ito, David Lawrence, Paul Mattione, Lubomir Pentchev,
Patrizia Rossi, Elton Smith, Sascha Somov, Simon Taylor,
Beni Zihlmann
</p>
<div id="toc" class="toc">
<div id="toctitle">
<h2>Contents</h2>
</div>
<ul>
<li class="toclevel-1 tocsection-1"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#David"><span
class="tocnumber">1</span> <span class="toctext">David</span></a></li>
<li class="toclevel-1 tocsection-2"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Sergey"><span
class="tocnumber">2</span> <span class="toctext">Sergey</span></a></li>
<li class="toclevel-1 tocsection-3"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Elton"><span
class="tocnumber">3</span> <span class="toctext">Elton</span></a></li>
<li class="toclevel-1 tocsection-4"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Simon"><span
class="tocnumber">4</span> <span class="toctext">Simon</span></a></li>
<li class="toclevel-1 tocsection-5"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Alex_A."><span
class="tocnumber">5</span> <span class="toctext">Alex
A.</span></a></li>
<li class="toclevel-1 tocsection-6"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Alexandre_D."><span
class="tocnumber">6</span> <span class="toctext">Alexandre
D.</span></a></li>
<li class="toclevel-1 tocsection-7"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Sascha_S."><span
class="tocnumber">7</span> <span class="toctext">Sascha
S.</span></a></li>
<li class="toclevel-1 tocsection-8"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Thomas"><span
class="tocnumber">8</span> <span class="toctext">Thomas</span></a></li>
<li class="toclevel-1 tocsection-9"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Hovanes"><span
class="tocnumber">9</span> <span class="toctext">Hovanes</span></a></li>
<li class="toclevel-1 tocsection-10"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Mark_I."><span
class="tocnumber">10</span> <span class="toctext">Mark
I.</span></a></li>
<li class="toclevel-1 tocsection-11"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Beni"><span
class="tocnumber">11</span> <span class="toctext">Beni</span></a></li>
<li class="toclevel-1 tocsection-12"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Lubomir"><span
class="tocnumber">12</span> <span class="toctext">Lubomir</span></a></li>
<li class="toclevel-1 tocsection-13"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Paul_M."><span
class="tocnumber">13</span> <span class="toctext">Paul
M.</span></a></li>
<li class="toclevel-1 tocsection-14"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Mark_D."><span
class="tocnumber">14</span> <span class="toctext">Mark
D.</span></a></li>
<li class="toclevel-1 tocsection-15"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#Senior_Staff.2C_Elton"><span
class="tocnumber">15</span> <span class="toctext">Senior
Staff, Elton</span></a></li>
<li class="toclevel-1 tocsection-16"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_April_17,_2017&printable=yes#OST.2FTOSP_Guidance.2C_Patrizia"><span
class="tocnumber">16</span> <span class="toctext">OST/TOSP
Guidance, Patrizia</span></a></li>
</ul>
</div>
<h2><span class="mw-headline" id="David">David</span></h2>
<ul>
<li> preparations for L3 mini-review
<ul>
<li> meeting held last week</li>
</ul>
</li>
<li> Geant3 vs Geant4 comparison work (with Elton)</li>
<li> creating a "back" button for the new event display</li>
</ul>
<h2><span class="mw-headline" id="Sergey">Sergey</span></h2>
<ul>
<li> work on L3 review -- performance improvements
<ul>
<li> CODA 3.07 testing
<ul>
<li> 2-stream writing, fixed now</li>
<li> multi-threaded event building, problems
encountered</li>
</ul>
</li>
</ul>
</li>
<li> TRD performance studies with Lubomir
<ul>
<li> getting agreement with MC</li>
<li> will report at future meeting</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Elton">Elton</span></h2>
<ul>
<li> CPP MC work, simulating ρ→π<sup>+</sup>π<sup>−</sup>
<ul>
<li> putting in S-wave</li>
<li> using MCwrapper</li>
<li> comparing Geant3 vs. Geant4
<ul>
<li> resolution for forward tracks much worse in
Geant4, issue not resolved</li>
<li> proton track in CDC comparable between G3 and
G4</li>
</ul>
</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Simon">Simon</span></h2>
<ul>
<li> preparations for resubmitting JEF proposal</li>
<li> cross section measurements</li>
<li> improved matching to start counter
<ul>
<li> change approach to swimming track toward start
counter plane</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Alex_A.">Alex A.</span></h2>
<ul>
<li> preparations for reconstruction launch
<ul>
<li> monitoring launches done</li>
<li> Sean D. working on calibrations</li>
<li> final test this week</li>
<li> yields higher for low intensity running, but
calibrations for high intensity behind</li>
</ul>
</li>
<li> started amplitude analysis working group
<ul>
<li> now: spin density matrix elements</li>
<li> GlueX-specific</li>
<li> meet every other Monday</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Alexandre_D.">Alexandre D.</span></h2>
<ul>
<li> writing review on spin structure functions</li>
<li> testing new perturbative QCD procedure, using α<sub>S</sub>
at medium energies</li>
<li> analysis of GDH experiment in Hall B</li>
<li> beam energy in Hall D, understanding</li>
<li> get Fast Access going for Hall D
<ul>
<li> all equipment in place now</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Sascha_S.">Sascha S.</span></h2>
<ul>
<li> trigger
<ul>
<li> long busy signal leads to crashes occasionally
<ul>
<li> TI/TD mis-communication</li>
</ul>
</li>
</ul>
</li>
<li> Primkoff
<ul>
<li> CompCal
<ul>
<li> Hall C ordering crystals, PMTs</li>
<li> testing dividers from Vladimir P.</li>
<li> can take 2 MHz with 2% deviation from linearity</li>
</ul>
</li>
<li> liquid helium target
<ul>
<li> Chris K. has liquefied helium at 4 K with
augmented heat shielding</li>
<li> will repeat with more realistic configuration</li>
<li> simulating method for monitoring target boiling</li>
</ul>
</li>
<li> ready for review in June, perhaps</li>
</ul>
</li>
<li> JEF
<ul>
<li> simulating rare decay</li>
</ul>
</li>
<li> Nuclear target proposal
<ul>
<li> worked on data analysis</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Thomas">Thomas</span></h2>
<ul>
<li> MCwrapper, designed with low barrier to entry</li>
<li> cross section for φ→KK</li>
<li> event viewer work with Dmitry R.</li>
<li> run browser performance speed-up work</li>
</ul>
<h2><span class="mw-headline" id="Hovanes">Hovanes</span></h2>
<ul>
<li> Goni repair work, with Tech Staff
<ul>
<li> work on pitch stage in EEL</li>
<li> took apart, changed electronics, re-assembled</li>
<li> can do maintenance/repair here at Lab</li>
<li> question on how to align stages, probably use
Survey Group</li>
</ul>
</li>
<li> TAC: incorporate into ROOTSpy for monitoring</li>
</ul>
<h2><span class="mw-headline" id="Mark_I.">Mark I.</span></h2>
<ul>
<li> added gluex ROOT analysis to standard build</li>
<li> worked on gluex_install
<ul>
<li> complete build from scratch</li>
<li> incorporate Geant4, HDGeant4, gluex ROOT analysis</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Beni">Beni</span></h2>
<ul>
<li> TOF calibration
<ul>
<li> re-do with finer data grid</li>
</ul>
</li>
<li> timing calibration help for PS hodoscope</li>
<li> TOF PMTs look OK, not replacing them this summer
<ul>
<li> continue to look at Vladimir's divider design
<ul>
<li> test counter set-up in ESB</li>
<li> can inject light from an LED into counter at
high rate</li>
</ul>
</li>
</ul>
</li>
<li> analysis: neutral events with π<sup>0</sup>'s -- look
for proton in start counter only
<ul>
<li> perhaps a way to access low t</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Lubomir">Lubomir</span></h2>
<ul>
<li> J/ψ from 2017 monitoring data
<ul>
<li> get 30 more J/ψ's</li>
<li> factor of 3 more φ's</li>
<li> using only angles, can avoid using kinematic fit</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Paul_M.">Paul M.</span></h2>
<ul>
<li> analysis library
<ul>
<li> re-factoring to make more efficient, core code only</li>
<li> ready for test in a few weeks</li>
</ul>
</li>
<li> CLAS paper
<ul>
<li> passed committee review</li>
</ul>
</li>
<li> Launches
<ul>
<li> waiting for alignment calibrations from Mike S.</li>
<li> will re-run 2016 golden period</li>
<li> 2017 data waiting on BCAL calibrations</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Mark_D.">Mark D.</span></h2>
<ul>
<li> BCAL calibration, 4 ns offset in 2017 data
<ul>
<li> need run-by-run calibration</li>
<li> looking at TDC as standard to find ADC shifts</li>
<li> after done, go on to attenuation length, gain,
end-to-end timing calibrations</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Senior_Staff.2C_Elton">Senior
Staff, Elton</span></h2>
<ul>
<li> ACC will try to run with 4 of 5 compressors for south
CHL
<ul>
<li> likely will result in more trips</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline"
id="OST.2FTOSP_Guidance.2C_Patrizia">OST/TOSP Guidance,
Patrizia</span></h2>
<ul>
<li> new web page in "For Scientists" section to guide
newbies in writing these</li>
</ul>
</div>
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<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, (757)269-5295
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