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</style><article id="node-1199220" class="node node-logentry contextual-links-region article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/4126183" rel="bookmark">RC Report 7-2-23</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/4126183/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/4126183/delete?destination=email/send">Delete</a></li></ul></div>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4126183" class="lognumber" data-lognumber="4126183">4126183</a>. Submitted by <a href="https://logbooks.jlab.org/user/rmontgom">rmontgom</a> on <time datetime="2023-02-07T11:42:35-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1675784555&end_date=1675791755&book=HALOG">Tue, 02/07/2023 - 11:42</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr></table></div>
<div class="logentry node-content">
<p>Yesterday during day whilst ops worked on the accelerator, we accessed the Hall for the outstanding requests. Holly checked an SBS GEM DAQ cable; Jack collected some items; Todd checked the target oven heater; DC power checked on the Moller magnet trips. Early on in swing we closed up the Hall. Swing was then spent waiting for beam.</p>
<p>During owl, roughly ~1am, beam checkout started. Unfortunately the beam width was not acceptable (too wide, consistently in X) and there was some back and forth whilst the profile was de-bugged. This went on for roughly 5 hours and since then ops have been working on understanding beam issues. Ops reported that during this process the Hall A beam profile was not repeatable, and they were observing position fluctuations during tuning of our optics linked to injector discharges which were throwing off the profiles. They will need to investigate.</p>
<p>Although the other Halls established beam at different points throughout the night, it was noted that the beam degraded throughout the night (BLM trips).</p>
<p>Currently beam is down for optics debug and beam orbit tuning. Experts in ops are meeting to check the machine and make a plan. We are hoping to be able to checkout beam again later on during day shift today.</p>
<p>Meanwhile the target is patiently waiting and ready to go, currently with 52.2% polarisation out of beam.</p>
<p>Run Plan:<br />
Let's wait to hear from ops. When they are ready we will move on to full checkout and then production running on polhe3.</p>
<p>Meeting:<br />
It may be a quick one, but let's still meet at 3.30pm today (upstairs in the counting house) or on zoom:<br /><a href="https://jlab-org.zoomgov.com/j/1619032184?pwd=aWhTVWxya1ZZQzA1K2ZPSTd2ZX">https://jlab-org.zoomgov.com/j/1619032184?pwd=aWhTVWxya1ZZQzA1K2ZPSTd2ZX</a>...<br />
Meeting ID: 161 903 2184<br />
Passcode: 260715</p>
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