<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Okay, then the interlock screen lines up with what was done.</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hopefully with the shorting leads installed we can be done with dealing with these switches causing faults!</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I wonder if we should look into an alternative part for them? The idea of the panel is a good one and they are useful to have for doing the checkouts as well as diagnostics. I'm pretty sure they're all C&K switches which are normally pretty reliable. Maybe
should try a different family from them or try something from a different company? Although with the shorting leads maybe it isn't needed?</div>
<div id="appendonsend"></div>
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<hr style="display: inline-block; width: 98%;">
<div id="divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Sunday, December 10, 2023 5:49 PM<br>
<b>To:</b> Brian Eng <beng@jlab.org>; Probir Ghoshal <ghoshal@jlab.org>; dsg-hallb magnets <dsg-hallb_magnets@jlab.org><br>
<b>Subject:</b> Re: [Dsg-hallb_magnets] Hall B magnets trip</span>
<div> </div>
</div>
<div style="direction: ltr;">We installed the shorting leads today and just reset everything for the Torus. </div>
<div style="direction: ltr;"><br>
</div>
<div style="direction: ltr;">When we were installing the leads we found 4 switches that were flaky.</div>
<div id="x_ms-outlook-mobile-signature"></div>
<hr style="display: inline-block; width: 98%;">
<div id="x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Brian Eng <beng@jlab.org><br>
<b>Sent:</b> Sunday, December 10, 2023 5:45:48 PM<br>
<b>To:</b> Probir Ghoshal <ghoshal@jlab.org>; dsg-hallb magnets <dsg-hallb_magnets@jlab.org>; Tyler Lemon <tlemon@jlab.org><br>
<b>Subject:</b> Re: [Dsg-hallb_magnets] Hall B magnets trip</span>
<div> </div>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Did the shorting leads for the VT panel of the Torus get installed?</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Also, was the QD already reset for the Torus? If not, it is kind of odd that there are no QD faults in the interlocks.</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I'm pretty sure this has the same faults when it tripped on 10/10 and we couldn't find anything in the VT data that time either, but maybe this one is different?</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
The one on 10/10 had nearly all the Torus QDs tripping at the same time and then a Solenoid QD ~400 ms later.</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">I made a logbook entry with some screenshots:
<a href="https://logbooks.jlab.org/entry/4232495" id="OWA6cfc357d-931e-053b-7e16-daf9f28cd5a7" class="OWAAutoLink" data-auth="NotApplicable">
https://logbooks.jlab.org/entry/4232495</a></span></div>
<div id="x_x_appendonsend"></div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<hr style="direction: ltr; display: inline-block; width: 98%;">
<div id="x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Dsg-hallb_magnets <dsg-hallb_magnets-bounces@jlab.org> on behalf of Tyler Lemon via Dsg-hallb_magnets <dsg-hallb_magnets@jlab.org><br>
<b>Sent:</b> Sunday, December 10, 2023 1:49 PM<br>
<b>To:</b> Probir Ghoshal <ghoshal@jlab.org>; dsg-hallb magnets <dsg-hallb_magnets@jlab.org><br>
<b>Subject:</b> Re: [Dsg-hallb_magnets] Hall B magnets trip</span>
<div> </div>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Probir, You're completely right.</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I misread the columns I guess.</div>
<div id="x_x_x_appendonsend"></div>
<hr style="direction: ltr; display: inline-block; width: 98%;">
<div id="x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Probir Ghoshal <ghoshal@jlab.org><br>
<b>Sent:</b> Sunday, December 10, 2023 1:48 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org>; dsg-hallb magnets <dsg-hallb_magnets@jlab.org><br>
<b>Subject:</b> Re: Hall B magnets trip</span>
<div> </div>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I disagree...I see that that Torus Sum2 ent earlier than solenoid...!</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Please confirm..</div>
<div id="x_x_x_x_Signature">
<p style="direction: ltr; margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></p>
</div>
<div id="x_x_x_x_appendonsend"></div>
<hr style="direction: ltr; display: inline-block; width: 98%;">
<div id="x_x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Sunday, December 10, 2023 1:33 PM<br>
<b>To:</b> dsg-hallb magnets <dsg-hallb_magnets@jlab.org>; Probir Ghoshal <ghoshal@jlab.org><br>
<b>Subject:</b> Hall B magnets trip</span>
<div> </div>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hi Probir,</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
The SOE screen for the Hall B magnets show that Solenoid QD2 tripped first. Photo of screen attached.</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I'm currently pulling up the VT archived data to see if there's any more info there.</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
-Tyler</div>
</body>
</html>