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</style><article id="node-601291" class="node node-logentry article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3528416" rel="bookmark">Root Cause Search for ESR Trip 2/6/2018</a>
</h1>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3528416" class="lognumber" data-lognumber="3528416">3528416</a>. Submitted by <a href="https://logbooks.jlab.org/user/kashy">kashy</a> on <time datetime="2018-02-06T22:41:20-0500" pubdate="pubdate">Tue, 02/06/2018 - 22:41</time>. </p>
<p class="last-update">
Last updated on <time datetime="2018-02-06T23:42:23-0500" pubdate="pubdate">Tue, 02/06/2018 - 23:42</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/halog">HALOG</a> <a href="https://logbooks.jlab.org/book/hblog">HBLOG</a> <a href="https://logbooks.jlab.org/book/hclog">HCLOG</a> <a href="https://logbooks.jlab.org/book/clog">CLOG</a> <a href="https://logbooks.jlab.org/book/elog">ELOG</a></td></tr><tr><th>Entry Makers: </th><td>kashy</td></tr><tr><th>Backlinks: </th><td><a href="https://logbooks.jlab.org/entry/3528425">Follow-up Re: Root Cause Search for ESR Trip 2/6/2018</a></td></tr></table></div>
<div class="logentry node-content">
<p>I looked though many signals in the Mya Viewer Archive. I found the following:<br />
In time order (times per the data logger, there may be time shifts due to data collection rates etc.)<br />
At 16:34:33 the SHMS Dipole started 1 rampdown that lasted about 1 minute<br />
At 16:34:40 the lead flow of the Hall C SHMS HB magnet went from 100 steady up to 113 then back down to 100 at 13:35:17<br />
At 16:35:18-23 all other Hall C SHMS started rampdowns that lasted sless than 1 minute<br />
At 16:35:19 the helium level in the Hall C SHMS HB went from 70 to 51<br />
At 16:35:26 the lead flow in the Hall C SHMS Q3 went form 88 to 85 (not a big change)<br />
At 16:35:37 the three pressure sensors on the quench headers of Halls A, B, C (CPI603QA, QB, QC) started to slowly rise from their flatline values<br />
At 16:35:40 the helium level of the Hall C SHMS Q3 went from 70% to 35%<br />
At 16:35:48 the Hall B Solenoid magnet resevoir started to slowly loose helium level<br />
At 16:36:02 the Hall A Right Dipole started to slowly ramp down but at 16:37:31 it started to ramp up<br />
At 16:36:08-12 All Hall C HMS magnets started rundowns that lasted 1-3 minutes<br />
At 16:37:42 the helium level in the Hall A right dipole started to climb then at 16:39:09 ti dopped form 96% to 26%<br />
At 16:44:56 ESR Turbines T1 and T2 tripped<br />
At 16:54:00 the Hall B solenoid fast dumped<br />
At 17:22:02 the ESR Turbine T2 was restarted<br />
AT 17:28:25 the Hall B Torus fast dumped<br />
At 17:30:54 the ESR Turbine T1 was restarted</p>
<p>I can't make any firm conclusions, because I do not know the accuracy of the time stamps on the above data...<br />
I do not know all the interlocks on the Turbines but see no big events really close in time to the turbine trips</p>
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