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</style><article id="node-787676" 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/3714738" rel="bookmark">T-Gun: Plug to Bias Grid During HV Processing</a>
</h1>
</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3714738/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3714738/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/3714738" class="lognumber" data-lognumber="3714738">3714738</a>. Submitted by <a href="https://logbooks.jlab.org/user/mstefani">mstefani</a> on <time datetime="2019-08-04T15:43:01-0400" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1564944181&end_date=1564951381&book=GTSLOG">Sun, 08/04/2019 - 15:43</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2019-08-04T15:43:51-0400" pubdate="pubdate">Sun, 08/04/2019 - 15:43</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/gtslog">GTSLOG</a></td></tr><tr><th>Entry Makers: </th><td>mstefani</td></tr></table></div>
<div class="logentry node-content">
<p>Our DC bias still remotely operates only in negative voltages. When we resume HV processing, the cathode is going to need to be heated to prevent contamination. This means that, with HV present, we will need to suppress electron emission. This will be achieved remotely by biasing the grid with the negative DC bias we have. The plug and cables in the attached images will be used in place of the RF transmission line during the HV processing. </p>
<p>The red and black wire will carry the current that heats the cathode and the white wire (which is completely isolated) will contact the grid and supply the negative bias.</p>
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<div class="attachment-box">
<div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="https://logbooks.jlab.org/system/temporary/styles/plentybig/temporary/plug.jpg" width="960" height="1280" title="Attachment 1" /></div> <div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="https://logbooks.jlab.org/system/temporary/styles/plentybig/temporary/plug_face.jpg" width="960" height="1280" title="Attachment 2" /></div> <div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="https://logbooks.jlab.org/system/temporary/styles/plentybig/temporary/wires.jpg" width="960" height="1280" title="Attachment 3" /></div> </div>
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