[Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

[Brian Eng]

Should I change the limits for that PT from something other than 1-1.5 then?

________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of David Kashy <kashy at jlab.org>
Sent: Wednesday, July 15, 2020 9:53 AM
To: Tyler Lemon <tlemon at jlab.org>; Ruben Fair <rfair at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Hi Tyler,
1.5 is the setpoint for control so it will read that most of the time.

Dave
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Wednesday, July 15, 2020 9:37 AM
To: Ruben Fair <rfair at jlab.org>; David Kashy <kashy at jlab.org>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Cc: Probir Ghoshal <ghoshal at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Ruben, Dave,

The "failure" for PT8554 is that the script expects the sensor's reading to be between 1 atma and 1.5 atma. Since the value the script saw for PT8554 was 1.5 atma, it put the status as "FAIL".

Tyler
________________________________
From: Ruben Fair <rfair at jlab.org>
Sent: Wednesday, July 15, 2020 9:27 AM
To: Tyler Lemon <tlemon at jlab.org>
Cc: Probir Ghoshal <ghoshal at jlab.org>
Subject: Fw: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Hi Tyler,

Could you comment on Dave's question below?

Cheers

Ruben

________________________________
From: David Kashy <kashy at jlab.org>
Sent: Wednesday, July 15, 2020 8:46 AM
To: Ruben Fair <rfair at jlab.org>; Probir Ghoshal <ghoshal at jlab.org>; Denny Insley <dinsley at jlab.org>
Cc: Nicholas Sandoval <sandoval at jlab.org>
Subject: Re: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Hi All,
It is correct that TD8522TR has been very unreliable in the past, especially when below 10K. During warm up and cooldown it seems to work better. It is also true that it is not used for control so running without it is not a big deal.

As far as PT8554, that is another story. This sensor is the input parameter for the LN2 reservoir back pressure control. It seems to be working fine at least now when I looked.

What was the indication that caused it to be "failed" during the checkout?

Thanks
Dave


________________________________
From: Ruben Fair <rfair at jlab.org>
Sent: Tuesday, July 14, 2020 3:27 PM
To: David Kashy <kashy at jlab.org>; Probir Ghoshal <ghoshal at jlab.org>; Denny Insley <dinsley at jlab.org>
Cc: Nicholas Sandoval <sandoval at jlab.org>
Subject: Fw: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Dave,

See elog below from the magnet pre-check today - I believe neither the temp or press sensor is being used to control anything?

https://logbooks.jlab.org/entry/3814661

[cid:a085db29-3ee8-43e5-9b24-e8fabd360697]

[cid:9d782124-1718-4ea5-b08f-00251ddc11b5]

Probir,

I think we did at one time try swapping leads to activate the spare TD8522TR but saw the same behavior?

Ruben

________________________________
From: Dsg-hallb_magnets <dsg-hallb_magnets-bounces at jlab.org> on behalf of Tyler Lemon <tlemon at jlab.org>
Sent: Tuesday, July 14, 2020 2:59 PM
To: dsg-hallb magnets <dsg-hallb_magnets at jlab.org>
Subject: [Dsg-hallb_magnets] Hall B magnet interlock and instrumentation checkouts complete

Hello

Pablo, Probir, and I have completed the pre-power-up interlock and instrumentation checkouts for the Hall B Solenoid and Torus. The checkout results have been posted to the logbooks at the links below.

Torus interlock - https://logbooks.jlab.org/entry/3814708
Torus instrumentation - https://logbooks.jlab.org/entry/3814474 , https://logbooks.jlab.org/entry/3814475
Solenoid interlock - https://logbooks.jlab.org/entry/3814709
Solenoid instrumentation - https://logbooks.jlab.org/entry/3814661

Tyler
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