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Friends,<br>
<br>
Find the notes below and at
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_September_21,_2015">https://halldweb.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_September_21,_2015</a>
.<br>
<br>
-- Mark<br>
_______________________<br>
<br>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">Private:Hall D Staff
Meeting, September 21, 2015</span></h1>
<div id="bodyContent" class="mw-body-content">
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<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Present: Eugene Chudakov (chair),
Mark Dalton, Alexandre Deur, Hovanes Egiyan, Sergey
Furletov, Mark Ito, David Lawrence, Lubomir Pentchev,
Elton Smith, Justin Stevens, Simon Taylor, Beni Zihlmann<br>
</p>
<span class="mw-headline" id="Eugene"></span>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Eugene">Eugene</span></h2>
<ul style="list-style-type: square;">
<li>Hadron Conference was here last week
<ul style="list-style-type: square;">
<li>not clear how to distinguish particles from
threshold effects</li>
<li>perhaps observe multiplets</li>
<li>Stefan Powell: perhaps answer will emerge in
analogy to atomic spectral lines</li>
</ul>
</li>
<li>budget: it's the end of the FY and we spent everything</li>
<li>running in 2015
<ul style="list-style-type: square;">
<li>Rolf: no provision for running</li>
<li>plan: electron beam to tagger dump</li>
<li>fast feedback testing will require photons, so
plan may have to be amended</li>
<li>schedule has shrunk from 9 weeks to 5 weeks of
running</li>
<li>12 GeV is top priority, DOE mandated</li>
<li>January run still planned, for physics</li>
<li>in December, will go to Hall A dump as well</li>
<li>helium treatment of cavities far behind schedule</li>
<li>options for additional goals:
<ul style="list-style-type: square;">
<li>Hall D photon beam</li>
<li>high power to Hall A</li>
</ul>
</li>
</ul>
</li>
<li>solenoid
<ul style="list-style-type: square;">
<li>magnet still at 0 C
<ul style="list-style-type: square;">
<li>resistance is 13.6 Ohms, not 16 Ohms expected
at room temperature</li>
</ul>
</li>
<li>all coils at the same temp.</li>
<li>water sensor shows no anomalies</li>
<li>last weekend, George Biallas increase current on
heater, saw a 10 degree rise</li>
<li>work on mock-ups for changes going well,
procedures tested, practice welds done, scheme for
attaching Teflon pipe to stainless pipe worked out</li>
<li>after opening:
<ul style="list-style-type: square;">
<li>use boroscope to find out where the two pipes
go</li>
<li>when 2 inch helium pipe opened, process
irreversible, gasket cannot be re-used or
replaced</li>
</ul>
</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="David">David</span></h2>
<ul style="list-style-type: square;">
<li>Working on event tagging
<ul style="list-style-type: square;">
<li>mandated from software review</li>
<li>mark events suitable for use in calibration</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Sergey">Sergey</span></h2>
<ul style="list-style-type: square;">
<li>debugging hardware: start with F125s for FDC
<ul style="list-style-type: square;">
<li>works on bench for Cody, problem in real crates
for compression + multi-block read-out</li>
</ul>
</li>
<li>CODA bug was fixed</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Simon">Simon</span></h2>
<ul style="list-style-type: square;">
<li>working on sag of CDC straws
<ul style="list-style-type: square;">
<li>Spring run: 2 connectors worth of channels where
fit does not work, fixing these up</li>
</ul>
</li>
<li>did survey of multi-photon final states</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Beni">Beni</span></h2>
<ul style="list-style-type: square;">
<li>two knocking sensors purchased
<ul style="list-style-type: square;">
<li>hooked up to sound card on PC</li>
<li>connected to ADC, good signal to noise</li>
<li>will add 60 Hz canceling</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Alexandre">Alexandre</span></h2>
<ul style="list-style-type: square;">
<li>finishing analysis of beam data
<ul style="list-style-type: square;">
<li>will write summary note, send to Todd Satogata</li>
</ul>
</li>
<li>ordered sensors for fast access to Hall D</li>
<li>item ordered in Spring still not here
<ul style="list-style-type: square;">
<li>need 2 neutron and 2 photon detectors to replace
loan from RadCon</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Mark">Mark</span></h2>
<ul style="list-style-type: square;">
<li>started conversion of data challenge 3 to SWIF</li>
<li>first draft of scripts to run simulation for Spring
Commissioning II</li>
<li>working with Sean on automatic builds of pull requests</li>
<li>features added to build_scripts, documented in recent
GlueX note</li>
<li>hdgeant now runs on RHEL7. Changed compiler flags for
GCC 4.8</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Justin">Justin</span></h2>
<ul style="list-style-type: square;">
<li>DIRC review 3 weeks from Wed.</li>
<li>Technical Design Report
<ul style="list-style-type: square;">
<li>give collaboration 1 week to feedback</li>
<li>give to committee 1 week in advance</li>
</ul>
</li>
<li>work also on Budget and Management Plan</li>
<li>some progress on Spring data fits</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Lubomir">Lubomir</span></h2>
<ul style="list-style-type: square;">
<li>working on diagnostic software
<ul style="list-style-type: square;">
<li>monitor efficiencies</li>
</ul>
</li>
<li>rate estimate:
<ul style="list-style-type: square;">
<li>at 10 nA, 10<sup>-4</sup><span
class="Apple-converted-space"> </span>radiator,
near aging limit in 3 weeks with an organic gas
component, which we do not have</li>
<li>ratio of current on inner wires field-off vs.
field-on is about 40</li>
<li>concludes we do not want to run with HV on and
field off</li>
</ul>
</li>
<li>tests done with mass flow controllers
<ul style="list-style-type: square;">
<li>weird behavior</li>
<li>doubling setting does not double flow</li>
</ul>
</li>
<li>might be something wrong with the gas
<ul style="list-style-type: square;">
<li>using spare package with more charge collected,
see factor of 2 between Garfield prediction and data</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Mark_2">Mark</span></h2>
<ul style="list-style-type: square;">
<li>working on low-level BCAL calibration
<ul style="list-style-type: square;">
<li>attenuation lengths, gain factors</li>
<li>possible problem with late time hits generated by
firmware</li>
</ul>
</li>
<li>looking at simulation: photon reconstruction</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Hovanes">Hovanes</span></h2>
<ul style="list-style-type: square;">
<li>LED pulser for FCAL
<ul style="list-style-type: square;">
<li>CAEN 1495 board</li>
<li>high level software re-designed, now operational</li>
<li>now pair spectrometer wants one
<ul style="list-style-type: square;">
<li>forked another application, hardware connected
in Hall</li>
</ul>
</li>
</ul>
</li>
<li>VME board for RF pre-scaling
<ul style="list-style-type: square;">
<li>installed in tagger hall</li>
<li>using spare for developing EPICS application</li>
<li>sets pre-scale factor and duty factor</li>
<li>basic GUIs in place, user GUI to come</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Elton">Elton</span></h2>
<ul style="list-style-type: square;">
<li>muon decays in the BCAL
<ul style="list-style-type: square;">
<li>see correct lifetime in 2 microsecond window</li>
<li>peak energy of electrons 1/2 of expectation using
nominal calibration</li>
<li>looked at mode 8 data: problems there</li>
<li>Will McG. looked at mode 7 data, sees same factor
of 2</li>
<li>shape of spectrum wrong, looks like a peak
produced by a low-energy threshold</li>
</ul>
</li>
<li>Tegan B. showed significant eta peak
<ul style="list-style-type: square;">
<li>exclusive events, measured recoil proton and
missing mass cuts, 6 GeV data</li>
</ul>
</li>
<li>last week nitrogen flow changed and humidity went up
<ul style="list-style-type: square;">
<li>due to nitrogen diverted to solenoid</li>
<li>will want to monitor this</li>
</ul>
</li>
<li>FCAL turned on, several failed bases
<ul style="list-style-type: square;">
<li>some voltages drop during day</li>
<li>firmware upgraded but going back to old firmware
did not fix things</li>
<li>problem seen after installation of EPICS controls,
but removing them did not fix things</li>
</ul>
</li>
<li>stand-alone FCAL DAQ not working</li>
<li>read-out values seem wrong for short periods, e. g.,
nominal 1500 gives 1650 V</li>
<li>taking problem bases out and shipping to IU for test
and repair
<ul style="list-style-type: square;">
<li>concern that bases going bad</li>
</ul>
</li>
</ul>
<h2 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Cryotarget">Cryotarget</span></h2>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Alexandre asked if we want to run it
in December. Depends a lot on how hard it is for the
target group to get it running.</p>
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