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Folks,<br>
<br>
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,_July_11,_2016">https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_July_11,_2016</a>
.<br>
<br>
-- Mark<br>
________________________<br>
<br>
<div id="content" class="mw-body" role="main">
<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Hall D Staff Meeting, July 11, 2016</span></h1>
<div id="bodyContent" class="mw-body-content">
<div id="siteSub">From Gluex PRIVATE Wiki</div>
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<p>Present: Alexander Austregesilo, Eugene Chudakov, Mark
Dalton, Alexandre Deur, Hovanes Egiyan, Sergey Furletov,
Mark Ito, Vanik Kakoyan, David Lawrence, Paul Mattione,
Lubomir Pentchev, Patricia Rossi, Elton Smith, Sascha Somov,
Justin Stevens, Simon Taylor, Tim Whitlatch, Zhenyu Zhang,
Beni Zihlmann
</p>
<div id="toc" class="toc"><br>
</div>
<h2><span class="mw-headline" id="Eugene">Eugene</span></h2>
<ul>
<li> Students who defended recently: Eric Pooser, Manuel
Lara, Aristeidis Tsaris, Hussein Al Ghoul, Will Levine</li>
</ul>
<h2><span class="mw-headline" id="Patrizia">Patrizia</span></h2>
<ul>
<li> returned from EIC Users' Group meeting at Argonne</li>
<li> discussion of how to prepare for National Academy of
Sciences review
<ul>
<li> heard from FRIB person on their experience</li>
</ul>
</li>
<li> discussion of how to involve international community
<ul>
<li> 2 reps from INFN, 1 from France, 1 from UK</li>
<li> proposal: users group meeting in Italy</li>
</ul>
</li>
<li> talks on machine design, one from JLab, one from BNL</li>
</ul>
<h2><span class="mw-headline" id="Tim">Tim</span></h2>
<ul>
<li> target cell removed, being measured today</li>
<li> issue with HVAC in Hall, got too chilly</li>
<li> crate issue today: running at 6,000 RPM</li>
<li> Aug. 9: Hall in controlled access for emergency
management exercise</li>
<li> solenoid: replacing transistor banks, finding new burnt
spots</li>
<li> StayTreat: discussion of gradients, cavities, radiation
damage to machine components, RF separator improvements
for Fall</li>
</ul>
<h2><span class="mw-headline" id="David">David</span></h2>
<ul>
<li> Level 3 work: 1/4 of physics events reconstructable
<ul>
<li> only 10% near beamline meet the criteria</li>
<li> BDT retains 25% of background, retains 90% of good
events</li>
</ul>
</li>
<li> simulation for CPP work</li>
<li> RAID server: need to re-specify for order</li>
</ul>
<h2><span class="mw-headline" id="Elton">Elton</span></h2>
<ul>
<li> worked on proposal for beamdump experiment behind Hall
A
<ul>
<li> 285 PAC days requested</li>
</ul>
</li>
<li> calorimeter reconstruction
<ul>
<li> split-off dealt with better after Will McGinley's
work</li>
<li> discrepancy between MC and data, MC pi0 peak wider</li>
</ul>
</li>
<li> reconstruction for pi+pi- for CPP
<ul>
<li> doing rho production</li>
<li> 17% reconstruction efficiency, needs to be
understood</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Simon">Simon</span></h2>
<ul>
<li> adding drift times to FDC track fitting
<ul>
<li> working now</li>
</ul>
</li>
<li> doing pass on recent reconstruction launch data,
re-doing multi-photon state analysis</li>
</ul>
<h2><span class="mw-headline" id="Alexander_A.">Alexander A.</span></h2>
<ul>
<li> took over reconstruction launches
<ul>
<li> batch 4 almost finished</li>
<li> link on main wiki page</li>
<li> only small problems</li>
</ul>
</li>
<li> FDC reconstruction, eye to implementing timing
<ul>
<li> found areas for improvements</li>
</ul>
</li>
<li> submitted abstract for APS meeting on rho polarization</li>
</ul>
<h2><span class="mw-headline" id="Justin">Justin</span></h2>
<ul>
<li> rho polarization as a function of beam energy
<ul>
<li> mysterious polarization below coherent peak</li>
<li> looking at diffs among diamonds, beam current
levels</li>
<li> experimental methods agree, see anomalous effect</li>
</ul>
</li>
<li> working with Jane on pi0 asymmetry measurement</li>
<li> Level 3: resurrected BDT algorithm
<ul>
<li> passed on the Adesh Subedi</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Sascha">Sascha</span></h2>
<ul>
<li> trigger efficiency, rho events
<ul>
<li> "not bad", 75% in data, must mask hot rings in FCAL</li>
<li> in MC 85%, after correcting for min. ionizing
effect, 90%</li>
<li> will look at other channels</li>
</ul>
</li>
<li> new FADC firmware
<ul>
<li> FCAL, BCAL, one crate each</li>
<li> doing tests</li>
</ul>
</li>
<li> with Josh Crafts, mag. field effect measurements for
PrimEx prototype calorimeter</li>
<li> tagger hodoscope repairs</li>
<li> preping for PrimEx readiness review</li>
</ul>
<h2><span class="mw-headline" id="Mark_I.">Mark I.</span></h2>
<ul>
<li> new release: 2.1.0</li>
<li> RCDB deployed as part of standard build</li>
<li> C++11 features now allowed for simulation and
reconstruction code, modifications in scripts setup, tests
(nightly, b1pi)</li>
<li> updated list of JLab shift takers</li>
<li> write-through cache adjustments
<ul>
<li> small files clean-up</li>
<li> forced write and pin</li>
<li> get and pin</li>
<li> leader board software for cache</li>
</ul>
</li>
<li> Advanced Scientific Computing Research (ASCR) case
study for GlueX and Hall D</li>
<li> preparations for sim1.1</li>
</ul>
<h2><span class="mw-headline" id="Beni">Beni</span></h2>
<ul>
<li> TOF: tested spare PMT
<ul>
<li> reproduce behavior seen in Hall with laser</li>
<li> at high rate, amplitude collapses</li>
<li> at 1300-1400 V, 150 mV pulses, PMT handles rates to
10 MHz</li>
<li> brighter pulses also collapse amplitude</li>
<li> tested 8-stage PMT from Paul Eugenio
<ul>
<li> same behavior, lower voltages OK up to 10 MHz</li>
</ul>
</li>
<li> effect on timing resolution no known</li>
<li> FSU doing test on cosmic test stand</li>
</ul>
</li>
<li> giving pizza seminar next week</li>
</ul>
<h2><span class="mw-headline" id="Paul">Paul</span></h2>
<ul>
<li> working on CLAS analysis last few weeks</li>
<li> will do analysis launch in a few weeks
<ul>
<li> run users analysis plugins against REST data</li>
</ul>
</li>
<li> preparing to analyze some channels</li>
<li> will look at track reconstruction efficiency</li>
</ul>
<h2><span class="mw-headline" id="Sergey">Sergey</span></h2>
<ul>
<li> looking at new improvements in software and in new CODA
software</li>
<li> performance testing planning underway</li>
<li> development of F125 firmware</li>
</ul>
<h2><span class="mw-headline" id="Lubomir">Lubomir</span></h2>
<ul>
<li> using genfit to look at performance of FDC in mag.
field</li>
<li> see resolution < 200 microns down to 150</li>
<li> single track comparison with Simon; differences
understood and corrected</li>
</ul>
<h2><span class="mw-headline" id="Hovanes">Hovanes</span></h2>
<ul>
<li> with Vanik, microscope support motion work
<ul>
<li> to adjust orientation with respect to electrons</li>
<li> one actuator acting differently, will swap encoder</li>
</ul>
</li>
<li> looking at MCB simulation code from Mainz
<ul>
<li> simulate photons at face of collimator</li>
<li> working, next: compare to scan taken during last
run</li>
</ul>
</li>
<li> modification to goniometer control
<ul>
<li> use wire for scans</li>
</ul>
</li>
<li> collimator stage will get reworked in Sep.
<ul>
<li> replace switches, add vertical motion</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Alexandre">Alexandre</span></h2>
<ul>
<li> with 4-operation will have additional source of
bleed-through
<ul>
<li> 4 lasers but only 3 slits</li>
<li> still will have bleed-through from old source</li>
</ul>
</li>
<li> problem with manpower in MCC during run
<ul>
<li> will be worse for 4-hall operation</li>
<li> fast access for Hall D will help</li>
</ul>
</li>
<li> looking at Hall D beam energy history
<ul>
<li> see 170 MeV drifts, some real, some fake</li>
<li> made a table, anti-correlated with energy drifts in
arcs</li>
<li> anti-correlated with Hall A</li>
</ul>
</li>
</ul>
<h2><span class="mw-headline" id="Mark_D.">Mark D.</span></h2>
<ul>
<li> simulation of Bethe-Heitler production</li>
<li> help with parity violation in resonance region proposal
in Hall C</li>
<li> next: BCAL efficiency study</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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