<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hi Joe,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Eric S, Amy C and myself were present during the test, beside the magnet when the quench-back occurred. There was only one Quench-back event within Hall C at around 10:50a this morning. After that event, the magnet power supply was turned off to allow magnets
to recover.<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
SHMS Q2 is slowly re-filling.<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Steven<br>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Joe Wilson <jwilson@jlab.org><br>
<b>Sent:</b> Monday, October 28, 2019 1:58 PM<br>
<b>To:</b> Probir Ghoshal <ghoshal@jlab.org>; Steven Lassiter <lassiter@jlab.org>; Eric Sun <qsun@jlab.org><br>
<b>Cc:</b> Cryo <esr-users@jlab.org><br>
<b>Subject:</b> Re: More SHMS Q2 dump test</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div style="color:rgb(0,0,0); font-family:"Times New Roman",Times,serif; font-size:12pt">
<p style="margin:0in 0in 8pt; line-height:107%; font-family:"Times New Roman",serif; font-size:12pt">
Steven,</p>
<p style="margin:0in 0in 8pt; line-height:107%; font-family:"Times New Roman",serif; font-size:12pt">
How did you confirm that no relief valve lifted, because ESR corrective actions may have been needed? As 1330 28Oct19, the ESR warm return line pressures have not yet recovered from the events at 1055 and 1153.</p>
<p style="margin:0in 0in 8pt; line-height:107%; font-family:"Times New Roman",serif; font-size:12pt">
Thanks!</p>
<br>
</div>
<div style="color:rgb(0,0,0); font-family:"Times New Roman",Times,serif; font-size:12pt">
<br>
</div>
<div id="x_Signature">
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif">
<p style="margin-top:0px; margin-bottom:0px; margin-top:0; margin-bottom:0"><span id="x_ms-rterangepaste-start"></span></p>
<div>
<p style="margin-top:0px; margin-bottom:0px; margin:0px 0px 10.66px; line-height:105%">
<span style="margin:0px; line-height:105%; font-family:"Times New Roman",serif; font-size:12pt">-----------------</span></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><b><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Joe D. Wilson, Jr.</span></b></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Cryogenic Operations Engineer</span></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"> </span></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><b><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">Jefferson Lab</span></b></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><a href="http://www.jlab.org/"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"><font color="#0563c1">www.jlab.org</font></span></a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"></span></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">office desk: 757-269-7722</span></p>
<p style="margin-top:0px; margin-bottom:0px; margin:0px"><a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt">jwilson@jlab.org</span></a><span style="margin:0px; font-family:"Times New Roman",serif; font-size:12pt"></span></p>
</div>
<span id="x_ms-rterangepaste-end"></span><br>
<p style="margin-top:0px; margin-bottom:0px"></p>
</div>
</div>
<div id="x_appendonsend"></div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Esr-users <esr-users-bounces@jlab.org> on behalf of Probir Ghoshal <ghoshal@jlab.org><br>
<b>Sent:</b> Monday, October 28, 2019 11:13 AM<br>
<b>To:</b> Steven Lassiter <lassiter@jlab.org>; Eric Sun <qsun@jlab.org><br>
<b>Cc:</b> Cryo <esr-users@jlab.org><br>
<b>Subject:</b> Re: [Esr-users] More SHMS Q2 dump test</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Steve, Eric,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
What's the temperature of the magnet and shied went up to?</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Eric - what is the hot spot temp you expected with fast dump from full current..?</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
I am curious about the data..!</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Speak to you later.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Regards</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Probir</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div id="x_x_appendonsend"></div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Esr-users <esr-users-bounces@jlab.org> on behalf of Steven Lassiter <lassiter@jlab.org><br>
<b>Sent:</b> Monday, October 28, 2019 11:02 AM<br>
<b>To:</b> Eric Sun <qsun@jlab.org>; Cryo <esr-users@jlab.org><br>
<b>Subject:</b> Re: [Esr-users] More SHMS Q2 dump test</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
At the highest current the dump test induce Quench back and pressures in SHMS Q2 rose to 4.757atm</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Almost to the relief setting.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
System is recovering now.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
testing is concluded.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Steven<br>
</div>
<div id="x_x_x_appendonsend"></div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Esr-users <esr-users-bounces@jlab.org> on behalf of Eric Sun <qsun@jlab.org><br>
<b>Sent:</b> Monday, October 28, 2019 9:51 AM<br>
<b>To:</b> Cryo <esr-users@jlab.org><br>
<b>Subject:</b> [Esr-users] More SHMS Q2 dump test</font>
<div> </div>
</div>
<style type="text/css" style="display:none">
<!--
p
{margin-top:0;
margin-bottom:0}
-->
</style>
<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
Howdy,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div id="x_x_x_x_appendonsend"></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
Hall C will be performing more Dump test of the SHMS Q2 magnet today.</div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
Do not expect any cryo issues from the test.</div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
<br>
</div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
Thanks a lot</div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
<br>
</div>
<div style="margin:0px; font-size:12pt; font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255)">
Eric</div>
<br>
</div>
<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>