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Folks,<br>
<br>
Find the notes below and at<br>
<br>
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_July_13,_2015">https://halldweb.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_July_13,_2015</a>
.<br>
<br>
-- Mark<br>
_________________________________________________<br>
<br>
<br>
<span dir="auto">Private:Hall D Staff Meeting, July 13, 2015</span><br>
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<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">Present: 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, Justin Stevens, Simon
Taylor, Tim Whitlatch, Beni Zihlmann
<br>
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<span class="mw-headline" id="Magnet_Review.2C_Eugene">Magnet
Review, Eugene</span><br>
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<ul>
<li> review tomorrow</li>
<li> charge:
<ol>
<li> evaluate evidence on quenches</li>
<li> review the current plan of action</li>
<li> assess risks of the plan</li>
</ol>
</li>
<li> panel/working-group has met before
<ul>
<li> second quench (low current, dI/dt = 0) rules
out some possibilities considered during analysis
of the first quench, e.g. a turn-to-turn short</li>
<li> current theory: combination of thermal event
and a flux jump</li>
<li> cryostable magnet implies flux jump alone
cannot cause quench</li>
</ul>
</li>
<li> two possible approaches
<ol>
<li> stay at 1200 A (conservative)</li>
<li> go back to 1300 A (higher with hysteresis
cycle), risk quench, try to understand behavior</li>
</ol>
</li>
<li> if it can be done, lower temperature should help in
any case</li>
</ul>
<br>
<span class="mw-headline" id="PAC_Results.2C_Eugene">PAC
Results, Eugene</span><br>
<ul>
<li> Patrizia: reports due back by tomorrow</li>
<li> Hall D had 2 LOIs
<ul>
<li> committee had little time to evaluate</li>
<li> Patrizia: K beam generated lots of discussion
<ul>
<li> could other facilities (e. g. J-PARC) do
better?</li>
<li> how is beam size controlled?</li>
</ul>
</li>
<li> Omega: physics case needs to be more explicit</li>
</ul>
</li>
<li> 8 proposals in all
<ul>
<li> 0 fully approved</li>
<li> 0 totally rejected</li>
</ul>
</li>
</ul>
<br>
<span class="mw-headline" id="S.26T_Review.2C_Eugene">S&T
Review, Eugene</span><br>
<ul>
<li> slides have been prepared, thanks to Matt Shepherd
and Justin</li>
<li> capital equipment projects
<ol>
<li> DIRC</li>
<li> FCAL upgrade (60x60 crystal insert)</li>
<li> polarized target (frozen spin?, HD-ice?)</li>
</ol>
</li>
</ul>
<br>
<span class="mw-headline"
id="Polarized_Target.2C_Alexandre">Polarized Target,
Alexandre</span><br>
<ul>
<li> discussed HD-ice with Andy Sandorfi
<ul>
<li> nose of cryostat needs modification, other than
that no fundamental difficulty</li>
</ul>
</li>
<li> CLAS6: proton polarization: 40%, deuterium
polarization: 20%
<ul>
<li> could do polarization transfer p -> d or
d->p, d could to to 30 or 40%</li>
</ul>
</li>
</ul>
<br>
<span class="mw-headline"
id="Spare_FDC_Package_Test_Configuration.2C_Tim">Spare
FDC Package Test Configuration, Tim</span><br>
<ul>
<li> shielding re-arranged near PS magnet</li>
<li> need to schedule installation of FDC package</li>
<li> need decision on pulling out target, planning
depends on whether or not there is CDC work
<ul>
<li> CDC leak fixing?</li>
<li> CDC noise reduction by re-working grounding of
HV boards</li>
<li> target group may have items</li>
</ul>
</li>
</ul>
<br>
<span class="mw-headline" id="Other_Topics">Other Topics</span><br>
<ul>
<li> Tim: magnet cool-down scheduled to start in August</li>
<li> Mark: Git conversion
<ul>
<li> scheduled for Wednesday</li>
<li> will create a succinct set of instructions</li>
</ul>
</li>
<li> Sergey: DAQ now writing most run info to RCDB</li>
<li> Beni: crates for FDC and CDC are on</li>
<li> Eugene: beam schedule: 1.5 weeks starting in
November</li>
</ul>
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