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</style>Hi folks,<br>
<br>
Here are the BTeam notes from this afternoon's BTeam meeting. Many
thanks for<br>
your attendance and input on plans for tomorrow and next week.
Cheers!<br>
<br>
-Todd<br>
<h1 class="title">BTeam-2011-04-13</h1>
<div class="outline-2">
<h2 id="sec-1">1 4.5 weeks (?) remaining before 6-month SAD
(pending firm budget!!)</h2>
</div>
<div class="outline-2">
<h2 id="sec-2">2 2011-04-13 Wed 14:00 BTeam Meeting Agenda</h2>
<div class="outline-3">
<h3 id="sec-3">2.1 Strategic Priorities for BTeam</h3>
<div class="outline-4">
<h4 id="sec-4">2.1.1 <span class="done">DONE</span> Support
of current experiments</h4>
</div>
<div class="outline-4">
<h4 id="sec-5">2.1.2 <span class="todo">TODO</span> CEBAF
baseline</h4>
</div>
<div class="outline-4">
<h4 id="sec-6">2.1.3 <span class="todo">TODO</span> Mott
polarimeter precision</h4>
</div>
<div class="outline-4">
<h4 id="sec-7">2.1.4 <span class="todo">TODO</span>
ORFP/Troubleshooting Guide Update </h4>
</div>
<div class="outline-4">
<h4 id="sec-8">2.1.5 <span class="todo">TODO</span>
Pathlength Correction with MO</h4>
</div>
<div class="outline-4">
<h4 id="sec-9">2.1.6 <span class="done">DONE</span>
LOCO/RayTrace data, improvements</h4>
</div>
<div class="outline-4">
<h4 id="sec-10">2.1.7 <span class="done">DONE</span> Optics
machine/model improvements</h4>
</div>
<div class="outline-4">
<h4 id="sec-11">2.1.8 <span class="done">DONE</span>
Additional bunchlength measurement, optimization</h4>
</div>
</div>
<div class="outline-3">
<h3 id="sec-12">2.2 Optics-on-Call Report: Alicia(Balsa)/Reza
=> Todd/Jay</h3>
<p>Overall operations seems to be running well, with parity
quality readbacks
for QWeak within specifications. We continue to have injector
drift problems,
partly handled by tweaking prebuncher phase (<a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578470">e1578470</a>,
<a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578474">e1578474</a>
and <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578658">e1578658</a>)
and partly by injector autosteering at least once/shift (<a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578581">e1578581</a>).
There was
also a tweak of 0L03-6 PASK to handle some 0R04 BLM trips (<a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578586">e1578586)</a>.
Some
time was given up last week to cathode reactivation on
2011-04-07. Clyde noted
that GASKs on 0L03 are high (<a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578779">e1578779</a>);
is this related to the symptom
related to the DC blocks?
</p>
</div>
<div class="outline-3">
<h3 id="sec-13">2.3 Beam Studies Report</h3>
<div class="outline-4">
<h4 id="sec-14">2.3.1 <span class="todo">TODO</span>
Stripline BPM IPM1L27C electronics: Musson/Keith Cole/Trent
Allison (~1h)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11025">ATLis
11025</a> Partly done Wed 2011-04-06 <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1578039">e1578039</a>.
Collected about half the
required data. Still need to test low current (~10nA),
single-pass beam to
BSY, stripline with new electronics to establish low-current
threshold.
</p>
</div>
<div class="outline-4">
<h4 id="sec-15">2.3.2 <span class="done">DONE</span>
LOCO/RayTrace optics tests: Yves, Ryan, Tief</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10708">ATLis
10708</a>: Continued optics evaluation of machine,
particularly Arc7.
Done Tue 2011-04-05 <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1577866">e1577866</a>,
included LOCO measurements and various
RayTrace measurements from Ryan. Two RayTrace sets, one
baseline and one
in support of LOCO, measuring with various quad settings
early in transport.
Some occasional beam loss problems. Yves is presently
analyzing data for LOCO;
Ryan is presently analyzing data for RayTrace.
</p>
</div>
<div class="outline-4">
<h4 id="sec-16">2.3.3 <span class="todo">TODO</span> Measure
6T Kicker response vs. frequency: Mike Spata</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11002">ATLis
11002</a>: Done Tue 2011-04-05 <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1577817">e1577817</a>.
Made 4 magnets, installed in 6T,
observed previous gain problem was on boards; retested after
fix, good out
to at least 250 Hz. Will be ready for another beam study
earliest
2011-04-19 Tue. Oher three trim cards installed today.
</p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-17">2.4 Beam Studies Planning</h3>
<div class="outline-4">
<h4 id="sec-18">2.4.1 <span class="todo">TODO</span> Inj High
Current HA/HC: Jay/Yan (~4-5h)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11066">ATLis
11066</a>: Likely planned for Thu 2011-04-14 0830-1230.
PSS/MPS already
setup up per <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1576974">e1576974</a>.
Program driven, so will need to return to this Friday
if not handled on Thursday. Spot move frequencies will
increase with higher
gun current draw; HA will continue to want high current.
Compton background
scaling problems correlated to recent spot move according to
Jay, hence
motivation for another spot move before weekend. Matt
suggests doing Wien
flip without spot move and review on Friday. Discussions
ensue about program
priorities for high current operations division between
Halls A/C.
Conclusion appears to be Wien flip, no spot move Thursday,
review Friday.
</p>
</div>
<div class="outline-4">
<h4 id="sec-19">2.4.2 <span class="todo">TODO</span>
Stripline BPM IPM1L27C electronics: Musson/Keith Cole/Trent
Allison (~1h)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11025">ATLis
11025</a> Complete on Tue 2011-04-19. Still need to test
low current
(~10nA), single-pass beam to BSY, stripline with new
electronics to establish
low-current threshold. This is a closeout of this item.
</p>
</div>
<div class="outline-4">
<h4 id="sec-20">2.4.3 <span class="todo">TODO</span> Measure
6T Kicker response vs. frequency: Mike Spata (6h)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11002">ATLis
11002</a>: Complete on Tue 2011-04-19. Hall A will be in
third pass on
Tue which minimizes setup time, but this is still dedicated
beam time due
to orbit modulation put on beam. This is a closeout of this
item.
</p>
</div>
<div class="outline-4">
<h4 id="sec-21">2.4.4 <span class="todo">TODO</span> Mott TOF
detection technique development: Matt/Joe (8h)</h4>
<p>(No ATLis yet?) Thu 2011-04-20 start. Hardware-oriented,
strategic work
to develop improved Mott polarization measurements with
reduced backgrounds.
Matt and Joe will make their case at BTeam. Musson has nice
box to produce
low repetition beam for this study; being checked out by
Musson/Grames today
opportunistically behind the DIS tour.
</p>
</div>
<div class="outline-4">
<h4 id="sec-22">2.4.5 Outstanding/Tabled ToDo items from
previous beam studies</h4>
<ul>
<li>Review/establish planned 12 GeV optics match procedures
in spreaders/recombiners.<br>
</li>
<li>CASA review (Yves? Tief?) of Arc1/Arc2 data from <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1572645">e1572645</a>.
Done again Mar 11.<br>
</li>
<li>Discuss impact of inj fopt correctors, cost/benefit of
replacement<br>
Jay to work with Ron on developing the ATLis for making
this change during the summer.
</li>
<li>Revisit <a href="http://cebaf.jlab.org/atlis/task/8346">ATLis
8346</a>, PZT if parity quality deems this necessary<br>
</li>
<li>Measuring 0L03/0L04 and capture/quarter transport: Yves<br>
<a href="http://cebaf.jlab.org/atlis/task/9621">ATLis 9621</a>
and <a href="http://cebaf.jlab.org/atlis/task/9622">ATLis
9622</a>: Not needed unless Hall C parity quality does
not meet
specification. Brad reports that the beam is presently
within specification.
QWeak also has DAQ problems in front end that also need to
be resolved.
</li>
</ul>
</div>
</div>
<div class="outline-3">
<h3 id="sec-23">2.5 APEL Hall Liason Comments</h3>
<div class="outline-4">
<h4 id="sec-24">2.5.1 Hall A: Yves</h4>
</div>
<div class="outline-4">
<h4 id="sec-25">2.5.2 Hall B: Tief</h4>
</div>
<div class="outline-4">
<h4 id="sec-26">2.5.3 Hall C: Jay</h4>
</div>
</div>
<div class="outline-3">
<h3 id="sec-27">2.6 AOB?</h3>
<div class="outline-4">
<h4 id="sec-28">2.6.1 <span class="todo">TODO</span> Injector
configuration documentation: Reza</h4>
<p>Document proper operational injector configuration (6.3 MeV
energy,
crested within 5 degrees, etc): Reza et al (in log; will be
in tech note)
</p>
</div>
</div>
</div>
<div id="postamble">
<p class="author"> Author: Todd Satogata
<a href="mailto:satogata@Todd-Satogatas-MacBook-Pro.local"><satogata@Todd-Satogatas-MacBook-Pro.local></a>
</p>
<p class="date"> Date: 2011/04/13 15:41:13</p>
</div>
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