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don't think this got through...sorry for the repeat if it did<br>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Subject:
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<td>[New Logentry] Discussion of special running</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date: </th>
<td>Sat, 26 Mar 2016 22:00:03 -0400 (EDT)</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, <a class="moz-txt-link-abbreviated" href="mailto:halld@jlab.org">halld@jlab.org</a></td>
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<article id="node-465275" class="node node-logentry article
ia-n clearfix" role="article">
<header class="node-header">
<h1 class="node-title"> <a moz-do-not-send="true"
href="https://logbooks.jlab.org/entry/3392451"
rel="bookmark">Discussion of special running</a> </h1>
</header>
<div class="date-vitals">
<p class="author-datetime"> Lognumber <a
moz-do-not-send="true"
href="https://logbooks.jlab.org/entry/3392451"
class="lognumber" data-lognumber="3392451">3392451</a>.
Submitted by <a moz-do-not-send="true"
href="https://logbooks.jlab.org/user/marki">marki</a>
on <time datetime="2016-03-26T21:55:06-0400"
pubdate="pubdate">Sat, 03/26/2016 - 21:55</time>. </p>
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<th>Logbooks: </th>
<td><a moz-do-not-send="true"
href="https://logbooks.jlab.org/book/hdlog">HDLOG</a></td>
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<th>Entry Makers: </th>
<td>Mark Ito</td>
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</div>
<div class="logentry node-content"> At the run coordination
meeting on Friday, we discussed two proposals for special
runs once the beam comes back.
<h3>Zero-Field Running</h3>
<p>Lubomir presented a <a moz-do-not-send="true"
href="https://logbooks.jlab.org/entry/3392044">proposal</a>
for running at zero field, taking advantage of having
the solenoid ramped down. There are several goals, and
two sets of running conditions, one for four hours, one
for two.
</p>
<p>We agreed to go ahead with his plan. This will be done
after initial beam quality checks.
</p>
<h3>Tagger Quadrupole Test</h3>
<p>Richard presented a <a moz-do-not-send="true"
href="https://halldweb.jlab.org/wiki/images/d/de/Quadrupolestudy-3-25-2016.pdf">proposal</a>
for testing the effectiveness of the quadrupole upstream
of the tagger magnet for focusing the electron beam on
to the middle row of the microscope counters. For the
proposed study the quadrupole will be set at the target
current and a single row of the microscope will be
turned on with the process repeated for each of the five
rows. The estimate is that one hour of running per row
should suffice.
</p>
<p>We agreed to defer this running until after we
re-establish and sustain normal production running
(para/perp/amorphous runs) for a few days at least. This
will allow us to confront any problems that may have
crept in during the down-time as well as discuss details
of the plan.
</p>
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