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<title>BTeam-2012-03-27</title>
BTeamers,<br>
<br>
Here are the notes from last Tuesday's BTeam meeting. Since we have
beam studies<br>
scheduled this week on Tuesday to align with Hall B activities, and
several people<br>
will be very busy with those studies at the usual meeting time,
there is no BTeam<br>
meeting tomorrow, Apr 3. BTeam will resume on Apr 10. Please send me
any comments<br>
or items you would like included in that agenda.<br>
<br>
-Todd<br>
<h1 class="title">BTeam-2012-03-27</h1>
<div class="outline-2">
<h2 id="sec-1">1 Optics on Call Report/Schedule</h2>
<ul>
<li>20 Mar-27 Mar: Fanglei/Geoff (swaped Yuhong to 10-17 Apr)<br>
<ul>
<li><span class="done">DONE</span> ? C100: 2L24 back to 90,
Weds 21 Mar hope to go to 95; 2L25 at 65 (?)<br>
</li>
<li>C100 recovery procedures are work in progress; Terry
Carlino working on screens for ops<br>
<ul>
<li>
This includes HV status when turning HV on (and only
some of four HV really are up)
</li>
<li>
From end of Weds beam studies to Sat vac event, each
C100 took out ~8h in recovery time
</li>
<li>
Speediest recovery time ~10 min at present
</li>
<li>
Shift program priority from high gradient to optimum
speed of recovery (lower gradient=>lower trip rate)
</li>
</ul>
</li>
<li>Pass change was expected for Thu 22 Mar Day but 5-pass
was problematic<br>
</li>
<li>Heat/activate on Mon 26 Mar (10h+), found arc9
quadrupole trim card bad (<a
href="https://cebaf.jlab.org/elog/entry/1717552">e1717552</a>)<br>
<ul>
<li>
Tief also found BPM response problems (<a
href="https://cebaf.jlab.org/elog/entry/1717544">e1717544</a>)
(Pete supercal'd)
</li>
<li>
TODO Scale factor in EPICS needs to be checked for
0R04 BPM (m15 can type, 18.81 scale factor; Tief,
Brian Bevens)
</li>
<li>
Tief backed out of MO FM input changes (<a
href="https://cebaf.jlab.org/elog/entry/1717582">e1717582</a>;
doubled phase noise wrt 1497 line, outside C100
target)
</li>
</ul>
</li>
<li>Outstanding pathlength scope issues from previous
meetings<br>
<ul>
<li>
DONE NL pathlength scope doesn't visibly change when
changing SL pathlength (repaired)
</li>
<li>
TODO Pathlength system sensitivity issue, biases?
(Musson)
</li>
<li>
TODO Phase knob for NL pathlength scope is
non-functional; SL works. (Musson/Tief)
</li>
<li>
TODO Complete setup of NL pathlength for 5-pass, since
present setup is not finalized
</li>
<li>
NL pathlength had been off o(10 degrees!) for entire
run up to recent NL pathlength repair ! (cabling, RF
coupling)
</li>
</ul>
</li>
<li>Yves available for LOCO measurements next week (see
opportunistic beam studies)<br>
</li>
<li><span class="todo">TODO</span> Traditional CMPQ (OptiM
vs elegant) completely disagree:<br>
resolve path forward for present run and 12 GeV
(Yves/Todd/AHLA)
</li>
</ul>
</li>
<li>27 Mar-03 Apr: Ed/Todd<br>
<ul>
<li>5-pass setup PM Tue 27 Mar for hall B (started ~1100,
with 3-beam setup)<br>
</li>
</ul>
</li>
<li>03 Apr-10 Apr: Todd/Jay (swapped with Yuhong/Mike 10-17 Apr)<br>
</li>
</ul>
</div>
<div class="outline-2">
<h2 id="sec-2">2 Beam studies program strategy and priorities:
less than 8 weeks calendar time left! (Arne Freyberger)</h2>
<ul>
<li>Energy change in last ~10 days of running; HC is nominally
off but trying to come up with 3/4th pass program<br>
<ul>
<li>That type of program would potentially support
interesting BBU studies (Todd in New Orleans May 15
onward)<br>
</li>
<li>QWeak and Hall B have asked for run extensions; no
yes/no from Mont yet (but likelihood trending downwards)<br>
</li>
</ul>
</li>
</ul>
</div>
<div class="outline-2">
<h2 id="sec-3">3 More m56 compression and relieving 0L04 voltage
(Alex Bogacz)</h2>
<ul>
<li>See attached slides<br>
</li>
</ul>
</div>
<div class="outline-2">
<h2 id="sec-4">4 Current RayTrace Analysis using SVD (Ryan
Bodenstein)</h2>
<ul>
<li>See attached slides<br>
</li>
</ul>
</div>
<div class="outline-2">
<h2 id="sec-5">5 Beam Studies Planning for Tuesday Apr 3 (to align
with Hall B down period)</h2>
</div>
<div class="outline-2">
<h2 id="sec-6">6 Opportunistic beam studies:</h2>
<ul>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12094">a12094</a>
2.0 Model: calibration tests (LOCO) in Arc4 (Roblin)
</li>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12095">a12095</a>
2.0 Model: calibration tests (LOCO) in Arc6 (Roblin)
</li>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12270">a12270</a>
4.0 PEPPo: First CW beam (Grames)
</li>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12231">a12231</a>
2.0 Mott: Target variations (Suleiman)
</li>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12235">a12235</a> —
C100: SL24 HOM Baseline (Satogata/Shin)
</li>
<li>
<b>[<span style="visibility:hidden;">X</span>]</b> <a
href="https://cebaf.jlab.org/atlis/task/12267">a12267</a> —
C100: SL25 C100 Test(3) </li>
</ul>
<p>======================================================================
</p>
</div>
<div class="outline-2">
<h2 id="sec-7">7 Measuring Bunch Length using 1A Sync Light
Monitor (Tief)</h2>
<ul>
<li>New BTeam elog entry on this procedure: <a
href="https://cebaf.jlab.org/elog/entry/1661304">e1661304</a><br>
</li>
<li><span class="todo">TODO</span> Prioritize and projectize for
long down (12 GeV cameras, Arne)<br>
</li>
</ul>
</div>
<div class="outline-2">
<h2 id="sec-8">8 Improvements to Krest vs manual cresting, impact
in 12 GeV era (Noel/Jay)</h2>
</div>
<div class="outline-2">
<h2 id="sec-9">9 Hall C compton orbit lock missing DOF
(Mark/Jay/Yves/Alicia)</h2>
</div>
<div class="outline-2">
<h2 id="sec-10">10 Online pathlength prototyping before long
shutdown (Tief)</h2>
</div>
<div class="outline-2">
<h2 id="sec-11">11 Injector bunch length and m56 optimization
group (Geoff/Alex/Reza/Todd/Arne)</h2>
</div>
<div class="outline-2">
<h2 id="sec-12">12 Upgrade ARC1 fOpt correctors? (Spata's
dissertation correctors could be used, currently in 6T)</h2>
</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: 2012/04/02 09:56:42</p>
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