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</style>Colleagues,<br>
<br>
Here are the BTeam Meeting agenda for this afternoon and notes from
last week. As usual,<br>
we'll meet at 2 PM after the scheduling meeting in the MCC
conference room. With limited<br>
time remaining, let's work to use our studies time productively and
address some of the<br>
remaining strategic considerations. In particular, I'll be pushing
for Joe to get some time to<br>
work on improvements in Mott Polarimetry starting next Thursday,
2011-04-21. We will<br>
also discuss current issues with QWeak Compton backgrounds and plans
for high-current<br>
two-hall run setup. See you there!<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: Shahid/Geoff =>
Alicia(Balsa)/Reza</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=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 0R03-6 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.
</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.
</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 (~4h)</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.
</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.
</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 (?)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11002">ATLis
11002</a>: Will be ready for another beam study earliest
2011-04-19 Tue
to complete this work.
</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?) Potentially Thu 2011-04-21.
Hardware-oriented, strategic work
to develop improved Mott polarization measurements with
reduced backgrounds.
Matt and Joe will make their case at BTeam.
</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>
<p>
======================================================================
BTeam
Meeting Notes 2010-04-06
</p>
</div>
</div>
</div>
<div class="outline-2">
<h2 id="sec-29">3 5.5 weeks remaining before 6-month SAD (pending
firm budget)</h2>
<p>We have ~1mo of carryover in the event of a (likely?)
government
shutdown. There will probably be a slew of people burning
vacation
over the summer.
</p>
</div>
<div class="outline-2">
<h2 id="sec-30">4 2011-04-06 Wed 14:00 BTeam Meeting Agenda</h2>
<div class="outline-3">
<h3 id="sec-31">4.1 Discussion of cathode heat/activate,
maintenance Thu 2011-04-07</h3>
<p>Conclude that 8h heat/activate, maintenance will occur on
Thursday.
BTeam reserves ability to recover some of this time at later
point.
If studies are run on Fri 2011-04-08, they should not end up
with a
new machine setup for weekend since experiments are happy and
looking
for steady high-current operation at present.
</p>
</div>
<div class="outline-3">
<h3 id="sec-32">4.2 Call for Strategic Priorities for BTeam</h3>
<p>Todd is soliciting input on priorities for studies before the
6
month SAD, emphasizing strategy rather than tactics. Items
currently on the list include:
</p>
<div class="outline-4">
<h4 id="sec-33">4.2.1 Support of current experiments</h4>
</div>
<div class="outline-4">
<h4 id="sec-34">4.2.2 CEBAF baseline</h4>
</div>
<div class="outline-4">
<h4 id="sec-35">4.2.3 Additional bunchlength measurement,
optimization</h4>
</div>
<div class="outline-4">
<h4 id="sec-36">4.2.4 ORFP/Troubleshooting Guide Update </h4>
</div>
<div class="outline-4">
<h4 id="sec-37">4.2.5 Pathlength Correction with MO</h4>
</div>
<div class="outline-4">
<h4 id="sec-38">4.2.6 LOCO/RayTrace data, improvements</h4>
</div>
<div class="outline-4">
<h4 id="sec-39">4.2.7 Optics machine/model improvements</h4>
</div>
<div class="outline-4">
<h4 id="sec-40">4.2.8 Mott polarimeter precision</h4>
</div>
</div>
<div class="outline-3">
<h3 id="sec-41">4.3 Optics-on-Call Report: Shahid/Geoff =>
Alicia(Balsa)/Reza</h3>
<p>Overall operations seems to be running well, with parity
quality readbacks
for QWeak within specifications. Does pager work? Page sent
and not received.
</p>
</div>
<div class="outline-3">
<h3 id="sec-42">4.4 Beam Studies Report</h3>
<div class="outline-4">
<h4 id="sec-43">4.4.1 <span class="done">DONE</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.
</p>
</div>
<div class="outline-4">
<h4 id="sec-44">4.4.2 <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.
</p>
</div>
<div class="outline-4">
<h4 id="sec-45">4.4.3 <span class="done">DONE</span>
Adjustment of MAT0L07H to steer around MBF0L07: Jay</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/11031">ATLis
11031</a>: Completed with readback issues 2011-04-02 <a
href="https://cebaf.jlab.org/elog/elog_item.php?elog_id=1577427">e1577427</a>.
Spectrometer
magnet failed a couple of times over the weekend, so this
was bucked with a
local corrector. Per elog, readback is 1/10 of setting, not
understood but can
run like this for now. Ron mentions that we could replace
this supply within 1h,
as it's run on the bench flawlessly for 2d.
</p>
</div>
<div class="outline-4">
<h4 id="sec-46">4.4.4 Low-current BPM test: John Musson</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10890">ATLis
10890</a> Check dynamic range of BCM/BPMs from 50-200 nA
with
good accuracy at Qweak helicity flip rate for g2p, Hall A.
Attempted 2011-04-05
yesterday but had some problems with low current beam. Will
consult with Musson
to evaluate status and reschedule.
</p>
</div>
<div class="outline-4">
<h4 id="sec-47">4.4.5 dp/p in chicane is unusually large (per
comment from Mike Spata); do we fix this?</h4>
<p>Jay thinks we shouldn't, Yves thinks we should. This is a
few percent, which is
unusually large. Last few slugs are dead on, so there's
little incentive to touch
this at present.
</p>
</div>
<div class="outline-4">
<h4 id="sec-48">4.4.6 Outstanding ToDo items from previous
beam studies</h4>
<ul>
<li><span class="todo">TODO</span> Review/establish planned
12 GeV optics match procedures in<br>
spreaders/recombiners.
</li>
<li><span class="todo">TODO</span> 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><span class="todo">TODO</span> 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><span class="todo">TODO</span> Revisit <a
href="http://cebaf.jlab.org/atlis/task/8346">ATLis 8346</a>,
PZT if parity quality deems this necessary<br>
</li>
</ul>
</div>
</div>
<div class="outline-3">
<h3 id="sec-49">4.5 Beam Studies Planning</h3>
<div class="outline-4">
<h4 id="sec-50">4.5.1 Continue 70 MHz MO Test Plan <a
href="http://cebaf.jlab.org/atlis/task/11002">AtLis 11002</a>
(?) (Curt and Tomasz)</h4>
<p>Earlier work was sufficent to lower the 60 Hz peaks by a
factor ten. </p>
</div>
<div class="outline-4">
<h4 id="sec-51">4.5.2 Measuring 0L03/0L04 and capture/quarter
transport: Yves</h4>
<p><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.
</p>
</div>
<div class="outline-4">
<h4 id="sec-52">4.5.3 Setup Inejctor for High Current (Yan and
Jay)</h4>
<p>Deferred until after April 18 when Hall A ramps up to 60 uA
while Hall C at 150 uA. </p>
</div>
<div class="outline-4">
<h4 id="sec-53">4.5.4 Hall B Multiharp: Jay</h4>
<p>Wants to set up 2nd pass to HB and take multiharp before
HDIce comes online.
Is this really setup time? Also evaluate/discuss other
multiharp data in BTeam
log.
</p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-54">4.6 APEL Hall Liason Comments</h3>
<div class="outline-4">
<h4 id="sec-55">4.6.1 Hall A: Yves</h4>
</div>
<div class="outline-4">
<h4 id="sec-56">4.6.2 Hall B: Tief</h4>
</div>
<div class="outline-4">
<h4 id="sec-57">4.6.3 Hall C: Jay</h4>
</div>
</div>
<div class="outline-3">
<h3 id="sec-58">4.7 AOB?</h3>
<div class="outline-4">
<h4 id="sec-59">4.7.1 <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 10:04:49</p>
</div>
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