[Dsg-hallb_magnets] Hall B magnets trip

[Brian Eng]

Okay, then the interlock screen lines up with what was done.

Hopefully with the shorting leads installed we can be done with dealing with these switches causing faults!

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?

________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Sunday, December 10, 2023 5:49 PM
To: Brian Eng <beng at jlab.org>; Probir Ghoshal <ghoshal at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnets trip

We installed the shorting leads today and just reset everything for the Torus.

When we were installing the leads we found 4 switches that were flaky.
________________________________
From: Brian Eng <beng at jlab.org>
Sent: Sunday, December 10, 2023 5:45:48 PM
To: Probir Ghoshal <ghoshal at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>; Tyler Lemon <tlemon at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnets trip

Did the shorting leads for the VT panel of the Torus get installed?

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.

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?

The one on 10/10 had nearly all the Torus QDs tripping at the same time and then a Solenoid QD ~400 ms later.

I made a logbook entry with some screenshots: https://logbooks.jlab.org/entry/4232495

________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Tyler Lemon via Dsg-hallb_magnets <dsg-hallb_magnets at jlab.org>
Sent: Sunday, December 10, 2023 1:49 PM
To: Probir Ghoshal <ghoshal at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnets trip

Probir, You're completely right.

I misread the columns I guess.
________________________________
From: Probir Ghoshal <ghoshal at jlab.org>
Sent: Sunday, December 10, 2023 1:48 PM
To: Tyler Lemon <tlemon at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Subject: Re: Hall B magnets trip

I disagree...I see that that Torus Sum2 ent earlier than solenoid...!
Please confirm..


________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Sunday, December 10, 2023 1:33 PM
To: dsg-hallb magnets <dsg-hallb_magnets at jlab.org>; Probir Ghoshal <ghoshal at jlab.org>
Subject: Hall B magnets trip

Hi Probir,

The SOE screen for the Hall B magnets show that Solenoid QD2 tripped first. Photo of screen attached.

I'm currently pulling up the VT archived data to see if there's any more info there.


-Tyler
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