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</style>All,<br>
<br>
Here is the agenda for this afternoon's BTeam meeting. A lot of the
discussion<br>
will surely be driven by the existing problems with stable
high-current setup for<br>
hall C. Please bring ideas for relevant test plans to the table; for
example, bunch<br>
length measurements seem to have a higher priority, but that will
depend on the<br>
final state of injector configuration during today's beam
development.<br>
<br>
-Todd <br>
<h1>
<center> BTeam-2011-01-26</center>
</h1>
<div class="outline-2">
<h2 id="sec-1">1 2011-01-26 Wed 14:00 BTeam Meeting Agenda</h2>
<div class="outline-3">
<h3 id="sec-2">1.1 Optics-on-Call Report: Yuhong/Tief =>
Byung/Yves</h3>
<p>This has been a very eventful week with serious struggles to
get high current operations back to hall C (1) and parity
quality beam back to hall B (5). Injector loss trips at 0R04
have limited us to <100uA at hall C often, with
hour-timescale drifts away whenever retuned. </p>
</div>
<div class="outline-3">
<h3 id="sec-3">1.2 Beam Studies Report</h3>
<div class="outline-4">
<h4 id="sec-4">1.2.1 <span class="done">DONE</span> 5s Motion
In Injector From Polling: Suleiman/Higgins (~1h)</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10739">ATLis
10739</a>: Done AM Wed 2011-01-26, confirmed polling/vert
motion correlation. Polling left off after study? </p>
</div>
<div class="outline-4">
<h4 id="sec-5">1.2.2 <span class="done">DONE</span>? LOCO
Model Calibration Tests in ARC3: Roblin (~2h) Tue 2011-01-18</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10700">ATLis
10700</a>: Measured, but BPM problems in center of arc.
Yves reported last week. Have some analysis upstream and
downstream of affected mux, but should restore good BPM
behavior and remeasure. </p>
</div>
<div class="outline-4">
<h4 id="sec-6">1.2.3 <span class="done">DONE</span>? RayTrace
in ARC3: Bodenstein (~30min) Tue 2011-01-18</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10708">ATLis
10708</a>: See above, should redo with LOCO model
remeasurement. </p>
</div>
<div class="outline-4">
<h4 id="sec-7">1.2.4 Double peaks in dispersive hall C BPMs:
Benesch</h4>
<p><a
href="http://opweb.acc.jlab.org/CSUEApps/elog/entry/1562549">elog
entry</a>: The differential (xdiff and ydiff) plots are
differences between helicity states. Nothing in ydiff. xdiff
shows something in 3C11 and 3C12 but not 3C14. Strange since
dispersion at 3C11=3C14. ypos (position) shows double peaks
at 3P03A and asymmetry at 3P02A. xpos shows the same. xpos
DOESN'T show anything at 3C12. </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-8">1.3 Beam Studies Planning</h3>
<div class="outline-4">
<h4 id="sec-9">1.3.1 <span class="todo">TODO</span>
Backphasing Bunch Length Measurement @100kV: Hofler (2-3h)</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10684">ATLis
10684</a>: Should be measured again before we leave 100 kV
injector voltage. We do not have a working bunchlength
measurement at 100 kV at present. IHA4D00 harp repaired Tue
2011-01-25 (<a
href="https://cebaf.jlab.org/atlis/task/10703">ATLis 10703</a>)
so measurement should be feasible. This may be a lower
priority depending on status of injector reconfiguration Wed
2011-01-26. </p>
</div>
<div class="outline-4">
<h4 id="sec-10">1.3.2 <span class="todo">TODO</span> Return
to Arc 1/2 New Optics: Arne (~2-4h)</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10652">ATLis
10652</a>: Attempted earlier in January. Want to put this
in and leave it in after a clean ORFP. </p>
</div>
<div class="outline-4">
<h4 id="sec-11">1.3.3 <span class="todo">TODO</span>
Determine multiharp masking requirements in tune/CW: Benesch</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10647">ATLis
10647</a>: New ATLis, not scheduled yet. Mainly hall C. </p>
</div>
<div class="outline-4">
<h4 id="sec-12">1.3.4 <span class="todo">TODO</span> Test
Hall C Energy Measurement Tool: Keesee/Wang (~1.5h)</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/7493">ATLis 7493</a>:
Old ATLis for new Hall C energy measurement tool. Some work
needed on analysis. Should be done before 6mo SAD. </p>
</div>
<div class="outline-4">
<h4 id="sec-13">1.3.5 <span class="todo">TODO</span> Hall B
PSS BCM Calibration: Mahoney</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10533">ATLis
10533</a>: Needs up to 500 nA CW to Hall B. Deferred due
to present Hall B current limit. </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-14">1.4 Bunch length team meeting report:
Kazimi/Hofler</h3>
<ul>
<li><span class="todo">TODO</span>: Bunch length group meeting
(Reza, Alicia, Tief)<br>
Is this necessary after 2011-01-26 injector reconfiguration?
Can we make bunch length phase configurations SW config
files? </li>
</ul>
</div>
<div class="outline-3">
<h3 id="sec-15">1.5 12GeV Pathlength Requirements Status:
Tiefenback</h3>
<div class="outline-4">
<h4 id="sec-16">1.5.1 <span class="todo">TODO</span> Need
conclusions document.</h4>
<p>In process. </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-17">1.6 AOB?</h3>
<div class="outline-4">
<h4 id="sec-18">1.6.1 <span class="todo">TODO</span>: Qweak
injector voltage 100 kV ok? Or do we move to 120 kV?</h4>
<p>
======================================================================
</p>
</div>
</div>
</div>
<div class="outline-2">
<h2 id="sec-19">2 2011-01-19 Wed 14:00 BTeam Meeting Agenda</h2>
<div class="outline-3">
<h3 id="sec-20">2.1 Optics-on-Call Report: Rui/MikeS =>
Yuhong/Tief</h3>
<p>Serious high current transport problems over weekend, work
done Sun 2011-01-16 over 4h to resolve; resteering injector
(Yan), retuning (Reza). High Compton backgrounds, BLM trips in
injector region. Injector multi-harp taken Sun and Tue. </p>
<p> Ambitious plan Tue 2011-01-18 included inj multiharp fits,
kHz spikes in BCM related to Pockel cells, transverse beam
noise vs prebuncher strength, quad center BPMs in 0L/0R and
adust SOF, maximize current to hall C. </p>
<div class="outline-4">
<h4 id="sec-21">2.1.1 <span class="done">DONE</span> FOPT to
end of C/B beamlines before Mott setup Thursday.</h4>
</div>
<div class="outline-4">
<h4 id="sec-22">2.1.2 <span class="todo">TODO</span>
Investigate Hall B energy.</h4>
<p>Hall B tagger setpoint is ~0.1% lower than December; is
energy the same or lower? </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-23">2.2 Beam Studies Report</h3>
<div class="outline-4">
<h4 id="sec-24">2.2.1 Mott Measurements: Grames/Suleiman
2011-01-13 Thu</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10588">ATLis
10589</a>: Completed? </p>
</div>
<div class="outline-4">
<h4 id="sec-25">2.2.2 LOCO Model Calibration Tests in ARC3:
Roblin (~2h) 2011-01-18 Tue</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10700">ATLis
10700</a>: Measured, but BPM problems in center of arc.
Yves will report; should repair and remeasure. </p>
</div>
<div class="outline-4">
<h4 id="sec-26">2.2.3 RayTrace in ARC3: Bodenstein (~30min)
2011-01-18 Tue</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10708">ATLis
10708</a>: Measured, but BPM problems in center of arc. </p>
</div>
<div class="outline-4">
<h4 id="sec-27">2.2.4 Double peaks in dispersive hall C BPMs:
Benesch</h4>
<p><a
href="http://opweb.acc.jlab.org/CSUEApps/elog/entry/1562549">elog
entry</a>: The differential (xdiff and ydiff) plots are
differences between helicity states. Nothing in ydiff. xdiff
shows something in 3C11 and 3C12 but not 3C14. Strange since
dispersion at 3C11=3C14. ypos (position) shows double peaks
at 3P03A and asymmetry at 3P02A. xpos shows the same. xpos
DOESN'T show anything at 3C12. </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-28">2.3 Beam Studies Planning</h3>
<div class="outline-4">
<h4 id="sec-29">2.3.1 LOCO Model Calibration Tests in ARC3:
Roblin (~2h)</h4>
<p><a href="http://cebaf.jlab.org/atlis/task/10700">ATLis
10700</a>: Needs checkout of BPMs. </p>
</div>
<div class="outline-4">
<h4 id="sec-30">2.3.2 Return to Arc 1/2 New Optics: Arne (~2h)</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10652">ATLis
10652</a>: Attempted earlier in January. Want to put this
in and leave it in after a clean ORFP. </p>
</div>
<div class="outline-4">
<h4 id="sec-31">2.3.3 Backphasing Bunch Length Measurement
@100kV: Hofler</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10684">ATLis
10684</a>: Should be measured again before we leave 100 kV
injector voltage. We do not have a working bunchlength
measurement at 100 kV at present. Last week a TODO item was
to have a bunch length team meeting; see below. </p>
<ul>
<li><span class="todo">TODO</span>: Qweak injector voltage
100 kV ok? Or to 120 kV? Alternatives?<br>
</li>
</ul>
</div>
<div class="outline-4">
<h4 id="sec-32">2.3.4 Determine multiharp masking requirements
in tune/CW: Benesch</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10647">ATLis
10647</a>: New ATLis, not scheduled yet. Mainly hall C. </p>
</div>
<div class="outline-4">
<h4 id="sec-33">2.3.5 Prebuncher control module swap, injector
retune</h4>
<p><a href="https://cebaf.jlab.org/atlis/task/10508">ATLis
10508</a>: To reduce 9.5 kHz noise when running prebuncher
above 2. This ATLis does not seem strongly motivated until
we go back to high injector voltage. </p>
<ul>
<li><span class="done">DONE</span> Should investigate now
we're at 100 kV w/lower prebuncher setting.<br>
This is done with the lower voltage. </li>
</ul>
</div>
</div>
<div class="outline-3">
<h3 id="sec-34">2.4 Bunch length team meeting report:
Kazimi/Hofler</h3>
<ul>
<li><span class="todo">TODO</span>: Bunch length group meeting
(Reza, Alicia, Tief)<br>
</li>
</ul>
</div>
<div class="outline-3">
<h3 id="sec-35">2.5 12GeV Pathlength Requirements Status:
Tiefenback</h3>
<div class="outline-4">
<h4 id="sec-36">2.5.1 <span class="todo">TODO</span> Need
conclusions document.</h4>
<p>In process. </p>
</div>
</div>
<div class="outline-3">
<h3 id="sec-37">2.6 AOB?</h3>
<p>USPAS tours are this Saturday afternoon, 2011-01-22. </p>
</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: 2011/01/26 09:49:11</p>
</div>
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