[Hallb-engineering] [Dsg-hallb_magnets] Hall B magnet (solenoid and torus) - Check list to be completed before switching on the MPS

Probir Ghoshal ghoshal at jlab.org
Fri Jan 11 10:37:34 EST 2019

Hi Brian,

Nick and I have now completed the hardware QD checks all excellent (both Torus and solenoid), no drifts even in the solenoid QD pots (Thanks to DC power and you all for the work carried out in the fall).

The controlled power is connected to the solenoid MPS but switched off and ADM lock is on the MPS's.

Please let us know (nick or me) when you are done with the solenoid then we can connect the controlled power o the torus mps.

The jumper leads on the solenoid VT panel is off for the voltage injection and I would personally like to be there to put it back or witness the leads been jumpered...can do this first thing on Monday morning.

Please get the sheets signed so that we can get together to complete the check list on Monday and prepare for switching on the MPSs for 500 A run on Tuesday..



From: Hallb-engineering <hallb-engineering-bounces at jlab.org> on behalf of Probir Ghoshal <ghoshal at jlab.org>
Sent: Thursday, January 10, 2019 4:13 PM
To: Brian Eng
Cc: Onish Kumar; hallb-engineering at jlab.org; dsg-hallb magnets; Mark Todd
Subject: Re: [Hallb-engineering] [Dsg-hallb_magnets] Hall B magnet (solenoid and torus) - Check list to be completed before switching on the MPS

Thanks Brian,

I will be there..!



From: Brian Eng
Sent: Thursday, January 10, 2019 3:56 PM
To: Probir Ghoshal
Cc: dsg-hallb magnets; Mark Todd; hallb-engineering at jlab.org; Onish Kumar
Subject: Re: [Dsg-hallb_magnets] Hall B magnet (solenoid and torus) - Check list to be completed before switching on the MPS

Hi Probir,

Most of DSG be busy with Hall C and HDIce work next week so we'll try and get the checklists done tomorrow (probably in the afternoon so we aren't trying to work in the same space as you and Nick).

Brian Eng
Detector Support Group

> On Jan 10, 2019, at 3:14 PM, Probir Ghoshal <ghoshal at jlab.org> wrote:
> Dear DSG HallB team,
> Happy new year to all.
> As we are preparing the magnets for run, the necessary modifications that was planned with the remote control crates of the MPS (both solenoid and torus) are complete and bench tested. But the the full test can only be accomplished upon switching on the MPS's and running to a lower current ~500A.
> In preparation of the same, the necessary check list are required to be signed off. The MPS check list is completed (signed copy is yet to be received, Onish), now will be checks to be completed on the hard-wired QD thresholds, and then followed by PLC/software limits for both Torus and solenoid.
> Nick and I will be carrying out the hard-wired checks, SOE mod and interlocks tomorrow morning (Magnets are already in the process of cool down to 4.5 K, lead by D Kashy).
> Suggest you all to please plan out the PLC/software checks in parallel or in the afternoon (if available). Else be advised to please do this at the earliest on Monday next week.
> Plan to run the magnet to lower current on Tuesday morning (if all cryo and hall activities permit).
> This will help all to prepare for the run in time and mitigate any actions that will be required to mitigate in a day or two.
> Please confirm your schedule and will work accordingly. Thanks for your support.
> Regards
> Probir
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