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</style><article id="node-1275485" 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/4202439" rel="bookmark">initial thoughts on repairing SBS GEM HV issue layer 6</a>
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Lognumber <a href="https://logbooks.jlab.org/entry/4202439" class="lognumber" data-lognumber="4202439">4202439</a>. Submitted by <a href="https://logbooks.jlab.org/user/hszumila">hszumila</a> on <time datetime="2023-10-18T12:58:29-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1697644709&end_date=1697651909&book=HALOG">Wed, 10/18/2023 - 12:58</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2023-10-18T12:58:59-0400" pubdate="pubdate">Wed, 10/18/2023 - 12:58</time></p>
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<div class="ctools-collapsible-container"><div class="ctools-collapsible-handle"><a href="#">There is 1 comment...</a></div><div class="ctools-collapsible-content"><a id="comment-46372"></a>
<article class="comment comment-new comment-by-node-author even clearfix"><header class="comment-header"><h3 class="comment-title">
<a href="https://logbooks.jlab.org/comment/46372#comment-46372" rel="bookmark">I will add that we still do</a> </h3>
<em class="new">new</em>
</header><footer class="submitted"><p class="author-datetime">by <a href="https://logbooks.jlab.org/user/hszumila" title="View user profile." class="username">hszumila</a> on <time datetime="2023-10-18T12:59:56-0400" pubdate="pubdate">Wed, 10/18/2023 - 12:59</time></p>
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<div class="field field-name-comment-body field-type-text-long field-label-hidden view-mode-elog_email"><div class="field-items"><div class="field-item even"><p>I will add that we still do not suspect a short. It seems that the HV from the divider is entirely disconnected from the layer. It is unclear why this would happen during the recent SAD, but that is the timeline we observe.</p>
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<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td></tr><tr><th>Entry Makers: </th><td>vimukthi, bhasitha</td></tr></table></div>
<div class="logentry node-content">
<p>We went into Hall A to get a look at what goes into repairing or inspecting the HV problem on the very top GEM module of layer 6 (second from end, highlighted here in yellow). Essentially, we would require a JLG+insertion of the sliding rail at the bottom to pull the layer out (it's impossible to access otherwise). However, as seen in this photo, it is impossible to slide out this layer at all due to the bracing for SBS running right next to the layer. Therefore, the HV problem on this GEM cannot be understood until the SAD.</p>
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