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Folks,<br>
<br>
Please find the notes below and at <a class="moz-txt-link-freetext" href="https://goo.gl/JkPW91">https://goo.gl/JkPW91</a> .<br>
<br>
-- Mark<br>
_________________<br>
<br>
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<h1 id="firstHeading" class="firstHeading" lang="en"><span
dir="auto">Hall D Staff Meeting, June 27, 2016</span></h1>
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<div id="siteSub">From Gluex PRIVATE Wiki</div>
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lang="en">
<p>Present: Alexander Austregesilo, Eugene Chudakov, Mark
Dalton, Alexandre Deur, Mark Ito, Vanik Kakoyan, David
Lawrence, Lubomir Pentchev, Sascha Somov, Justin Stevens,
Simon Taylor, Tim Whitlatch, 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,_June_27,_2016&printable=yes#Announcements.2C_Eugene"><span
class="tocnumber">1</span> <span class="toctext">Announcements,
Eugene</span></a></li>
<li class="toclevel-1 tocsection-2"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_June_27,_2016&printable=yes#Engineering.2C_Tim"><span
class="tocnumber">2</span> <span class="toctext">Engineering,
Tim</span></a></li>
<li class="toclevel-1 tocsection-3"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_June_27,_2016&printable=yes#TOF_PMTs.2C_Beni"><span
class="tocnumber">3</span> <span class="toctext">TOF
PMTs, Beni</span></a></li>
<li class="toclevel-1 tocsection-4"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_June_27,_2016&printable=yes#DIRC.2C_Justin"><span
class="tocnumber">4</span> <span class="toctext">DIRC,
Justin</span></a></li>
<li class="toclevel-1 tocsection-5"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_June_27,_2016&printable=yes#Level_3_Farm.2C_David"><span
class="tocnumber">5</span> <span class="toctext">Level
3 Farm, David</span></a></li>
<li class="toclevel-1 tocsection-6"><a
href="https://halldweb.jlab.org/wiki-private/index.php?title=Hall_D_Staff_Meeting,_June_27,_2016&printable=yes#Other_Items"><span
class="tocnumber">6</span> <span class="toctext">Other
Items</span></a></li>
</ul>
</div>
<h2><span class="mw-headline" id="Announcements.2C_Eugene">Announcements,
Eugene</span></h2>
<ul>
<li> Post-doc position advertised on SPIRES, 4 applications,
2 strong candidates</li>
<li> Staff position: 8 applications, 2 strong ones</li>
<li> APS mini-symposium, Jane and Alexander are giving
talks, apply for a slot if interested</li>
</ul>
<h2><span class="mw-headline" id="Engineering.2C_Tim">Engineering,
Tim</span></h2>
<ul>
<li> target survey done this morning
<ul>
<li> downstream window where it was supposed to be</li>
</ul>
</li>
<li> solenoid power supply transistor bank replacement 35%
done</li>
<li> DIRC mechanical design underway</li>
</ul>
<h2><span class="mw-headline" id="TOF_PMTs.2C_Beni">TOF PMTs,
Beni</span></h2>
<ul>
<li> we ran the TOF PMTs too hot, degradation during run
observed, especially in the central region</li>
<li> noticed in falling efficiency</li>
<li> away from beamline, gain fell from 5 to 20%</li>
<li> with too much current there is anode degradation</li>
<li> on innermost difference between PARA and PERP intensity
manifested in gain changes</li>
<li> need to reduce gain, set range for ADC to 500 mV max</li>
<li> 1300 V showed plateau, we ran at 1600 V</li>
<li> may have to replace PMTs</li>
<li> highest rate on inner thin counters: 1-1.5 MHz</li>
</ul>
<h2><span class="mw-headline" id="DIRC.2C_Justin">DIRC, Justin</span></h2>
<ul>
<li> Stephanie Worthington, Tim, John Frye are looking at
design
<ul>
<li> design program completed to minimize material in
front of FCAL</li>
</ul>
</li>
<li> Fernando looking at testing electronics
<ul>
<li> reviewing CLAS 12 system, first production boards
are in</li>
<li> INFN guy will come over and do testing</li>
</ul>
</li>
<li> optical box: MIT doing the design
<ul>
<li> a bit distracted by Dark Light, but catching up</li>
</ul>
</li>
<li> PMTs in budget for FY17
<ul>
<li> procurement planned for January, first ones should
arrive in March</li>
</ul>
</li>
<li> Will use box owned by Detector Group</li>
</ul>
<h2><span class="mw-headline" id="Level_3_Farm.2C_David">Level
3 Farm, David</span></h2>
<ul>
<li> procurement part of SciComp farm purchase</li>
<li> also will get new raid disk, another network switch</li>
</ul>
<h2><span class="mw-headline" id="Other_Items">Other Items</span></h2>
<ul>
<li> David: ROCs are on in Hall</li>
<li> Justin and Alexander: working on preparation for 3rd
batch of reconstruction processing</li>
<li> Justin: MC fix for FCAL corrections merged in</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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