<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body dir="auto"><div>Glenn,</div><div id="AppleMailSignature">Thanks</div><div id="AppleMailSignature">Mont<br><br>Sent from my iPhone</div><div><br>On Sep 15, 2017, at 12:48, Glenn Young <<a href="mailto:gyoung@jlab.org">gyoung@jlab.org</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<p>Dear Mont,<br>
It is in the fast daq files that Brian Eng recovers and
circulates.<br>
The first morning quench was at 1059 amps and the second at 1066
amps. Coil 3 both times.<br>
We have thus had, in order, quenches in coil 3,4,4,3,3.</p>
<p>Should try again about 2PM today once cryo has finished
recovering.<br>
Regards, Glenn<br>
</p>
<br>
<div class="moz-cite-prefix">On 9/15/2017 11:38 AM, Hugh Montgomery
wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Dave,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Where
do I read the current at which the dump occurred?<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose" moz-do-not-send="true"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Mont<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a class="moz-txt-link-abbreviated" href="mailto:kashy@jlab.org">kashy@jlab.org</a> [<a class="moz-txt-link-freetext" href="mailto:kashy@jlab.org">mailto:kashy@jlab.org</a>] <br>
<b>Sent:</b> Friday, September 15, 2017 11:25 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:hallb-engineering@jlab.org">hallb-engineering@jlab.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:stuart@jlab.org">stuart@jlab.org</a>;
<a class="moz-txt-link-abbreviated" href="mailto:mont@jlab.org">mont@jlab.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:ent@jlab.org">ent@jlab.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:rossi@jlab.org">rossi@jlab.org</a>;
<a class="moz-txt-link-abbreviated" href="mailto:gomez@jlab.org">gomez@jlab.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:rfair@jlab.org">rfair@jlab.org</a>; <a class="moz-txt-link-abbreviated" href="mailto:hogan@jlab.org">hogan@jlab.org</a>;
<a class="moz-txt-link-abbreviated" href="mailto:gyoung@jlab.org">gyoung@jlab.org</a><br>
<b>Subject:</b> [New Logentry] Solenoid "Training
Quench" and Recovery<o:p></o:p></span></p>
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<h1><span style="font-size:17.0pt;font-family:"Trebuchet
MS",sans-serif;color:#555555"><a href="https://logbooks.jlab.org/entry/3484541" moz-do-not-send="true">Solenoid "Training Quench" and
Recovery</a> <o:p></o:p></span></h1>
<div>
<p class="author-datetime1"><span style="font-size:9.0pt;font-family:"Trebuchet
MS",sans-serif;color:#555555">Lognumber <a href="https://logbooks.jlab.org/entry/3484541" moz-do-not-send="true">3484541</a>. Submitted by <a href="https://logbooks.jlab.org/user/kashy" moz-do-not-send="true">kashy</a> on Fri, 09/15/2017
- 11:23. <o:p></o:p></span></p>
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<o:p></o:p></span></b></p>
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1.2pt" width="340">
<p class="MsoNormal" style="mso-margin-top-alt:12.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:0in"><span style="font-size:9.0pt;font-family:"Trebuchet MS",sans-serif"><a href="https://logbooks.jlab.org/book/hbsolenoid" moz-do-not-send="true">HBSOLENOID</a>
<a href="https://logbooks.jlab.org/book/clog" moz-do-not-send="true">CLOG</a><o:p></o:p></span></p>
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<p><span style="font-size:10.5pt;font-family:"Trebuchet
MS",sans-serif;color:#555555">We started ramping
at 08:30 and at 9:08 the magnet fast dumped. Cryogenic
recovery took about 1hr and 50 minutes so total was
2.5 hrs start ramp to ready again<br>
We are ramping again.<o:p></o:p></span></p>
<p><span style="font-size:10.5pt;font-family:"Trebuchet
MS",sans-serif;color:#555555">We implemented a
manual version of a pressure venting system that is
designed to keep from blowing relief valve RV8670
which does not reseat w/o shutting off the helium.
This should keep the time to recover lower and allow
no intervention recovery as we just did.<br>
This also reduces peak load and pressure on warm
return and thus have less impact on other magnet lead
flows.<br>
At 11:05 we started ramp #2 for today<o:p></o:p></span></p>
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