<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
<!--
html{color:#555555;}body{line-height:1.5;font-family:'Trebuchet MS','Helvetica Neue',Arial,Helvetica,sans-serif;font-size:87.5%;}h1{font-size:1.6em;}h2.field-label{display:inline-block;font-size:1em;padding-right:5px;min-width:10em;margin:0.3em;}.problem_report{line-height:1.5;max-width:60em;}fieldset.problem_report.resolved
legend{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAy0lEQVQ4jWP8//8/AyWAiZACd3f3/xYWFrht+f//P1a84t3e/0obff4rbfT5D1GGXR0LuoEr3+/7X3W4n2gvwA0gVSOKAcqbfPGGpImJCU45JgYGBoa7fpsZ22wLSbadgYGBgRE9GrF55Vf2BYbHjx8zYjWB0ljAcAGGExkZ/0MtwuoCggmJEBh4AzBS4pMnT/7fuXOH4dKlSwwnT56EiwcGBv43MDBgMDExYdDX12eQkZGBhAlyiC5YsOA/AwMDUXjLli3/iYoFQgAA+pSxZrXofD0AAAAASUVORK5CYII=);background-repeat:no-repeat;padding-left:18px;}fieldset.problem_report.needs_attention
legend{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAA9ElEQVR42sWTvUoDQRSFv9wMKWxSBVmzdhZJIwTWv9pyLWxTpbE1kBeJPoLxBazzBgGFKNqlHXAhsITUw1y7sMpmjER0YJrDPWcO556BPzhjYPJjlhfT82LUpxcK6Lo5U0JMgcu56tXy7BQajeBDpkAcAEdz1W6uyrLdYieK2DMmKCArcqczpH/ddc0msy+OkyQJC4h3N0ynx+Q5ALtUNs5q5U+8e+R+VPFi4kjk3NZqd++qUK+TZVnYwSfAOyvejeLXt/2qVG/dYoG1dqseBNco27bs/wXKWhIDB8AhcFLAH4Bn4Al4AUqT7RVC++6mv/JVPwDi3VGzomYvyAAAAABJRU5ErkJggg==);background-repeat:no-repeat;padding-left:18px;}.problem_report div.field-items{display:inline-block;}div.date-vitals p{font-size:87.5%;}a{text-decoration:none;}.Readme a:link,.Readme a:visited,.Readme
a:active{color:red;}
-->
</style>
</head>
<body id="mimemail-body" class="elog-logentry-notify">
<div id="center">
<div id="main">
<style>
<!--/*--><![CDATA[/* ><!--*/
div.field-vitals{
margin: 0.5em 0;
}
div.field-vitals .field-type-taxonomy-term-reference {
margin: 0.1em 0;
}
article.comment {
padding-left: 10px;
}
article.comment.odd {
background-color: #EEEEEE;
}
article.comment.even {
background-color: #DDDDDD;
}
div.node-content.logentry table{
width: auto;
border-collapse: collapse;
border-spacing: 0;
border-width: 1px;
}
div.node-content.logentry th{
border: inherit;
}
div.node-content.logentry blockquote{
background-color: #FFFFFF;
}
div.node-content.logentry caption{
font-size: 1em;
font-weight: normal;
}
table.field-vitals{
margin-top: 1em;
margin-bottom: 1em;
font-size: 87.5%;
}
table.field-vitals th{
vertical-align: middle;
text-align: left;
width: 15%;
padding: 0.1em;
}
table.field-vitals td{
vertical-align: middle;
text-align: left;
width: auto;
padding: 0.1em;
}
table.field-vitals td li {
margin-left: 0;
list-style-type: none;
list-style-image: none;
}
table.downtime {
width: 30em;
margin-bottom: 1em;
border: 1px black dotted;
}
table.downtime th {
text-align: center;
}
table.downtime td {
text-align: center;
}
tr.caption th {
border-bottom: none;
}
table.downtime tfoot{
background-color:#EEEEEE;
}
div.field-name-body{
margin: 1em 0;
font-size: 110%;
}
div.date-vitals p{
margin: .1em 0;
}
article div.ctools-collapsible-container{
margin-left: -5px;
clear: both;
}
#comment-form{
margin-left: 5px;
border: graytext outset medium;
-moz-border-radius: 15px;
border-radius: 15px;
padding: 1em;
}
div.comments-form-box {
margin-top: 2em;
margin-bottom: 5em;
}
h3.comment-title {
/* display: none; */
}
p.author-datetime{
font-weight: bold;
}
/*--><!]]>*/
</style><article id="node-922788" 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/3849805" rel="bookmark">Hall C RC Update (Sept 16)</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3849805/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3849805/delete?destination=email/send">Delete</a></li></ul></div>
<div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3849805" class="lognumber" data-lognumber="3849805">3849805</a>. Submitted by <a href="https://logbooks.jlab.org/user/brads">brads</a> on <time datetime="2020-09-16T18:57:34-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1600293454&end_date=1600300654&book=HCLOG">Wed, 09/16/2020 - 18:57</a></time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a></td></tr></table></div>
<div class="logentry node-content">
<p><strong>RC Daily Meetings are M-F at 4:15 PM</strong></p><pre>To join the Meeting: <a class="external free" href="https://bluejeans.com/861439920" rel="nofollow">https://bluejeans.com/861439920</a>
To join via phone : +1.408.740.7256 (US (San Jose)), +1.888.240.2560 (US Toll Free))
<br /><a class="new" title="RC Update and Run plan for Sep 16,2020" href="https://hallcweb.jlab.org/wiki/index.php?title=RC_Update_and_Run_plan_for_Sep_16,2020">RC Update and Run plan for Sep 16,2020</a></pre><p><strong> Wednesday 16 Sept 2020. </strong></p><h1><span id="General_updates" class="mw-headline">General updates</span></h1><p>(See <a title="D2n Run Plan 2020" href="https://hallcweb.jlab.org/wiki/index.php/D2n_Run_Plan_2020">d2n Run Plan 2020</a> for broader status/overview.)</p><ul><li>Lost SL 2K coldbox at 8am Tuesday morning <a class="external autonumber" href="https://logbooks.jlab.org/entry/3848721" rel="nofollow">[1]</a>; minimum 4 hour down, cryo identified the problem but machine wasn't back up until late swing<ul><li>QWP target optimization done this down <a class="external autonumber" href="https://logbooks.jlab.org/entry/3848806" rel="nofollow">[2]</a>, <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849677" rel="nofollow">[3]</a></li><li>NMR @ ~41--2% with calibration constant 5.04 (Note: calibration constant is estimated).<ul><li>Seems to be an overall improvement of a few percent. QWP work, or due to Target Oven temperature increased from 205 to 208 at 2338 on Mon <a class="external autonumber" href="https://logbooks.jlab.org/entry/3848466" rel="nofollow">[4]</a>?</li></ul></li></ul></li><li>Continued production running in Kin-A, Kin-X at transverse/270 (w/ T1 and T2 triggers) after standard beam profile checks during OWL</li><li>Moller measurement planned for Wednesday DAY starting at 8:30am<ul><li>Hall A's Moller will ran Wednesday DAY as well</li><li>Hall C result: 85.4% <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849516" rel="nofollow">[5]</a>; (Hall A: ~87% <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849466" rel="nofollow">[6]</a>, <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849477" rel="nofollow">[7]</a>)</li></ul></li><li>HMS dipole tripped at 8:10am <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849359" rel="nofollow">[8]</a>(Current lead mass flow fault triggered by unstable recovery pressure)<ul><li>HMS dipole PID loop adjusted by Heidi <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849434" rel="nofollow">[9]</a></li></ul></li><li>Setup spectrometers to Kin-C, Kin-Z (Target stays at transverse/270) <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849410" rel="nofollow">[10]</a>, <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849418" rel="nofollow">[11]</a></li><li>Production running in Kin-C, Kin-Z at transverse/270 (T1 trigger only) resumed around 1pm</li><li>We'll continue production data taking here until switch to 1-pass at 6am on Friday morning.</li></ul><p> </p><h2><span id="Notes_for_the_Future" class="mw-headline">Notes for the Future</span></h2><ul><li><a title="D2n Run Plan 2020" href="https://hallcweb.jlab.org/wiki/index.php/D2n_Run_Plan_2020#1-pass_Running">1-pass running</a>transition scheduled for 6am Friday, Sept 18<ul><li>RadCon is aware of the plans</li><li>Hall A will setup the charge-asym feedback system for us (P. King, et al)\</li><li>Junhao has some estimates of the NMR calibration coeffs for 1-pass 0 and 180 settings <a class="external autonumber" href="https://logbooks.jlab.org/entry/3849028" rel="nofollow">[12]</a></li></ul></li></ul><ul><li>Melanie, Murchhana, Chao, Sylvester: please check good electron yields per Coulomb for Kin-A/X runs with T1 vs. T3 (T2)<ul><li>Mostly complete. Early results don't show any surprises..</li></ul></li></ul><ul><li>EPR calibrations cross checks [Melanie]<ul><li>So far it all looks good, checks ongoing</li><li>Summary log entries: EPR(270, Kin-Z) <a class="external autonumber" href="https://logbooks.jlab.org/entry/3847972" rel="nofollow">[13]</a>, EPR(90, Kin-X) <a class="external autonumber" href="https://logbooks.jlab.org/entry/3848215" rel="nofollow">[14]</a></li></ul></li></ul><ul><li>Bill, Murchhana check compass/field measurements<ul><li>Also checking with Jixie re: modeled fields</li><li>Need to make a write-up that clearly defines all the different coordinate systems used, swapped power supply/polarity issues, etc.</li></ul></li></ul><ul><li>Start prepping for post-run work<ul><li>See <a title="D2n Run Plan 2020" href="https://hallcweb.jlab.org/wiki/index.php/D2n_Run_Plan_2020#POST-run_Calibrations.2FMeasurements">POST-run Calibrations/Measurements</a> for list</li></ul></li></ul><h2><span id="Pending_Issues" class="mw-headline">Pending Issues</span></h2><ul><li>Review and do any final prep/planning for 1-pass running<ul><li>Paddle optimization for 3He Elastic xsec running [Chao?]</li><li>EPR calibration for 1-pass 8.5deg setting (estimate from prior calibration?)</li></ul></li></ul><ul><li>Beam energy drifts<ul><li>Should confirm that MCC remembers to shift the energy lock to Hall C when Hall A turns off</li><li>Just something to keep an eye on. Has not been a problem lately.</li><li>Hall C 5-pass polarization goes down as energy (HALLC:p) goes up <a class="external autonumber" href="https://logbooks.jlab.org/entry/3844493" rel="nofollow">[15]</a></li></ul></li></ul></div>
<div class="attachment-box">
</div>
</article> </div>
</div>
</body>
</html>