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<font face="Helvetica, Arial, sans-serif">It may be associated with
Loop 3, liquid deuterium. This loop was left with its JT valve
cracked open, to keep things cold. It appears that earlier in the
day, some liquid condensed and then boiled away, probably due to
beam heating on a solid target. The solid targets are thermally
attached to Loop 3. I don't see anything happening at 10:35 PM
however. I see some minor fluctuations on our measurement of the
coolant return temperature, but less than 1/2 K out of 20 K. <br>
<br>
<br>
Chris<br>
<br>
<br>
<br>
</font>
<div class="moz-cite-prefix">On 2/19/18 1:53 PM, David Meekins
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1516957271.10723039.1519066387683.JavaMail.zimbra@jlab.org">
<div style="font-family: arial,helvetica,sans-serif; font-size:
14pt; color: #000000">
<div>The supply pressure also showed this fluctuation. No
changes at the target control end explain this (i.e. JT valves
and power were nearly constant)</div>
<div><br data-mce-bogus="1">
</div>
<div>The supply pressure ranged nearly +/- 0.5 atm about a
~12.9 atm average throughout this time. This oscillation
stopped about ~1100 yesterday.</div>
<div><br>
</div>
<div data-marker="__SIG_PRE__">David Meekins<br>
Staff Scientist<br>
Thomas Jefferson National Accelerator Facility<br>
12000 Jefferson Ave<br>
Newport News Va. 23606<br>
<br>
Office: 757-269-5434<br>
Cell: 757-968-9076</div>
<br>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b>"Dave Kashy"
<a class="moz-txt-link-rfc2396E" href="mailto:kashy@jlab.org"><kashy@jlab.org></a><br>
<b>To: </b><a class="moz-txt-link-abbreviated" href="mailto:brads+cdaq@jlab.org">brads+cdaq@jlab.org</a>, "esr-users"
<a class="moz-txt-link-rfc2396E" href="mailto:esr-users@jlab.org"><esr-users@jlab.org></a><br>
<b>Sent: </b>Monday, February 19, 2018 11:04:47 AM<br>
<b>Subject: </b>Re: [Esr-users] [New Logentry] 15K flow
acting strange<br>
</div>
<br>
<div data-marker="__QUOTED_TEXT__">Dave M or Chris K.<br>
Can you or someone else explain this?<br>
<br>
Thanks<br>
Dave<br>
<br>
----- Original Message -----<br>
From: <a class="moz-txt-link-abbreviated" href="mailto:brads+cdaq@jlab.org">brads+cdaq@jlab.org</a><br>
To: "kashy" <a class="moz-txt-link-rfc2396E" href="mailto:kashy@jlab.org"><kashy@jlab.org></a><br>
Sent: Sunday, February 18, 2018 2:30:04 AM<br>
Subject: [New Logentry] 15K flow acting strange<br>
<br>
Logentry Text:<br>
--<br>
Around 10:35 pm on 2/17/18 the 15K flow started jumping from
~16.5 to 20 g/s and now it is happening more frequently.
CFI6731C<br><br>
<br>
<br>
---<br>
<br>
This is a plain text email for clients that cannot display
HTML. The full logentry can be found online at
<a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3533730">https://logbooks.jlab.org/entry/3533730</a><br>
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</div>
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<br>
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<br>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
______________________________________________________
Christopher D. Keith, PhD
Jefferson Lab, Suite 6 email: <a class="moz-txt-link-abbreviated" href="mailto:ckeith@jlab.org">ckeith@jlab.org</a>
12000 Jefferson Ave. ph: 757-269-5878
Newport News VA 23606 fax: 757-269-5235
______________________________________________________</pre>
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