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<h1 class="title">NO BTEAM MEETING TODAY</h1>
<div id="outline-container-1" class="outline-2">
<h2 id="sec-1"><span class="section-number-2">1</span> <span
class="timestamp-wrapper"> <span class="timestamp">2009-09-23 Wed
14:00</span></span> No meeting </h2>
<div class="outline-text-2" id="text-1">
<p>There will not be a B-Team meeting today. </p>
<ul>
<li id="sec-1.1">Brief status Report <br>
Machine is running well since last Wednesday transport clean up. It
is unclear if the Compton rate reduction was due to shifting the
doglegs "out of the mud" and fixing the separator, or the thorough
cleaning up of separation and transport lines by MikeS and Yan. The
reason we are confused is due to the fact that the Compton detector
was in a non-standard configuration all day Wednesday. Nevertheless
the machine is in a "good place" due to all these efforts.
<p>The Beam Loss Accounting system is still has a large amount of
noise,
but the transport appears to be clean if one looks at the Beam Loss
Monitors, Beam Scraping monitors, Hall-B harp scans, Hall-A compton
rates. Yesterday the 500KeV kicker sensor was jumpered out to remove a
80Hz
intensity fluctuations in order to minimize the issues with BLA
system. With the this sensor jumpered out the 80 Hz noise was
removed, but the BLA still fluctuates between 0 and 1.7 μ A of loss.
</p>
<p>
The main issue this week have been establishing robust FFB
configuration
to both A and C. Sometime Monday morning, things drifted such that
disabling/enabling FFB in the A line caused ep ion chamber trips.
By carefully calibrating the FFB response matrix using low 5 to 10
μ A beam current, the FFB system appears to be more stable. Scott
Higgins, Pete Francis and Yan worked out the FFB subtleties yesterday.
</p>
<p>
There was a spurious, unexplained vacuum event in Arc1 earlier this
week. The excursion was not significant enough to close valves, but
three
ion pumps reported elated vacuum levels.
</p>
<ul>
<li id="sec-1.1.1">Parity Quality-Happex <br>
Happex is not reported any information on parity quality so we don't
know where we stand on this issue, only that the user claims there are
more pressing issues. The most pressing issue to Happex is the phase
advance at the last two BPMS, Alex and Jay have some plans to address
this at Happex's request.
</li>
<li id="sec-1.1.2">Energy Spread-HKS <br>
Energy spread appears to be reasonably under control. The OPS crews
need to keep running KREST and chase down pathlength errors as much as
possible to keep the energy spread under control. Without knowing the
η, ε and β and the 3C12 dipole the exact value
for the energy spread is unknown. The Synchrotron Light
Interferometer measures 3.5× 10<sup>-5</sup>, which is an upper limit
as
long as the η is near the design value of 4m.
<p>Beam transport to HKS has been routine over the week, no
issues other
than FFB.
</p>
</li>
<li id="sec-1.1.3">Hall-B <br>
Hall-B finished their experiment this morning and will down for the
next nine days to reconfigure. This experiment started in the Winter
run this year.
For this Fall09 run period Hall-B did not achieve its goals. </li>
</ul>
</li>
<li id="sec-1.2">On Call <br>
Reza was on-call last week. This week it is Geoff Krafft. </li>
</ul>
</div>
</div>
<div id="outline-container-2" class="outline-2">
<h2 id="sec-2"><span class="section-number-2">2</span> <span
class="timestamp-wrapper"> <span class="timestamp">2009-09-16 Wed
14:00</span></span> Agenda–Notes </h2>
<div class="outline-text-2" id="text-2">
<p>We will have a brief meeting after the 1:30 scheduling meeting to
discuss machine performance, list known problems and possible
solutions.
</p>
<p>
The machine has been running with issues over the week. Hall-A has
had a variable compton rate and the energy spread is not quite good
enough for Hall-C. With that said the Halls are "happy" with the
beam quality, but as the experimental issues subside the accelerator
issues will become more pressing.
</p>
<p>
The goal of the meeting will be to develop a plans. Execute the
non-invasive plans and lobby for time to execute the invasive plans
on Thursday.
</p>
</div>
</div>
<div id="postamble">
<p class="date"> Date: 2009-09-23 09:16:32 EDT</p>
<p class="creator">HTML generated by org-mode 6.30trans in emacs 23</p>
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