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<article id="node-1465013" class="node node-logentry article ia-n clearfix" role="article">
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<h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/4391949" rel="bookmark">ECal heater controls power restored</a>
</h1>
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<div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/4391949" class="lognumber" data-lognumber="4391949">4391949</a>. Submitted by <a href="https://logbooks.jlab.org/user/jonesdc">jonesdc</a> on <time datetime="2025-06-06T10:20:08-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1749216008&end_date=1749223208&book=HALOG">Fri, 06/06/2025 - 10:20</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2025-06-06T10:59:59-0400" pubdate="pubdate">Fri, 06/06/2025 - 10:59</time> </p>
<table class="field-vitals">
<tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr>
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<div class="logentry node-content">
<p>Around 7:30AM the RC called to say ECal alarms were going off and it appeared to be a communication issue. I came in expecting to quickly reboot the power strip but could not find it on the login screen. After logging into hareboot39 there was no power strip connected. However, it was reachable by pinging it. I realized this likely meant the power strip saw too much radiation. The camera showed no lights in the controls rack meaning that even the process controllers were out. Most sensors were reading 0 on the GUI.<br />
I took an escorted access into the hall and pulled the plug on the power strip and plugged it back it. Everything immediately returned to working. Temperatures began recovering. With heaters off for an hour, it will take the better part of 24hrs to fully recover.<br />
Looking at the placement of the rack, I noticed how vulnerable this power strip is to radiation from the target. Attachment 1 shows a photo of the power strip and the roof and interior of the bunker. The horizontal strip of green lights is the power strip. The crack of light just above that is a gap between the bunker wall and roof and you can see a strip that is about 20" below the target. Obviously, the shielding is non-optimal and it would have been better to either have a taller wall or have these electronics tucked into the bunker further.<br />
For now, we will continue running as is.</p>
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<div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="https://logbooks.jlab.org/files/styles/plentybig/public/2025/06/4391949/Screen Shot 2025-06-06 at 9.22.54 AM.png" width="960" height="1269" alt="" /></div> </div>
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