[Dsg-hallb_magnets] Hall B Sc magnets run

[Marco Battaglieri]

Dear Probir,
thanks for carefully taking care of our magnets! I agree with Stepan: we shall have a smooth and safe start next week.
Finger crossed to get the beam in schedule!
Thanks again
Marco

On 22 Nov 2019, at 15:16, Probir Ghoshal <ghoshal at jlab.org<mailto:ghoshal at jlab.org>> wrote:

Hi Stepan,
Okay agreed..!
We should plan to run both magnets on Monday morning (Dec 2nd 2019).
Thanks and have wonderful weekend.

Regards

Probir
________________________________
From: Stepan Stepanyan <stepanya at jlab.org<mailto:stepanya at jlab.org>>
Sent: Friday, November 22, 2019 1:52 PM
To: Probir Ghoshal <ghoshal at jlab.org<mailto:ghoshal at jlab.org>>
Cc: Denny Insley <dinsley at jlab.org<mailto:dinsley at jlab.org>>; Ruben Fair <rfair at jlab.org<mailto:rfair at jlab.org>>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org<mailto:dsg-hallb_magnets at jlab.org>>; Eugene Pasyuk <pasyuk at jlab.org<mailto:pasyuk at jlab.org>>; Bob Miller <rmiller at jlab.org<mailto:rmiller at jlab.org>>; David Kashy <kashy at jlab.org<mailto:kashy at jlab.org>>; Marco Battaglieri <battagli at jlab.org<mailto:battagli at jlab.org>>
Subject: Re: Hall B Sc magnets run

Hello Probir,

Technically I understand that “it is safe" to leave the magnet unattended at 250 A, but unexpected things can happen. But the main point here should be the need to have them ON. I did not hear a good motivation to do so. By next Tuesday/Wednesday we will know more about the machine schedule, but even optimistically, if we start on Monday 8 am, as it is on the white board now, we will not need that magnets until late afternoon.
Another point I want to make is about taking cosmic date, straight tracks, is this arrangement with the magnets at 250 A was discussed and agreed upon with everyone. People (central tracker for example) may want to run cosmic calibrations over the long down time before the start of the run.

Regards, Stepan

On Nov 22, 2019, at 10:49 AM, Probir Ghoshal <ghoshal at jlab.org<mailto:ghoshal at jlab.org>> wrote:

Dear Stepan,
The magnet is at 250A, as mentioned if the magnet trips because of any reason not going tp cause any heating or cryo-event.
We intend to run the magnets as soon as we come back from holidays and avoid the magnet sweep and to restrict people working around the magnet (if this is not adm. controlled that we have seen and experienced in the past).
But again it is your choice...hence asked to confirm.
Please let me know. Then we can plan every thing upon our return because we have already run both magnets to field last month to ensure magnet performance for the Fall run.

Regards
Probir
________________________________
From: Stepan Stepanyan <stepanya at jlab.org<mailto:stepanya at jlab.org>>
Sent: Friday, November 22, 2019 10:43 AM
To: Probir Ghoshal <ghoshal at jlab.org<mailto:ghoshal at jlab.org>>
Cc: Denny Insley <dinsley at jlab.org<mailto:dinsley at jlab.org>>; Ruben Fair <rfair at jlab.org<mailto:rfair at jlab.org>>; dsg-hallb magnets <dsg-hallb_magnets at jlab.org<mailto:dsg-hallb_magnets at jlab.org>>; Eugene Pasyuk <pasyuk at jlab.org<mailto:pasyuk at jlab.org>>; Bob Miller <rmiller at jlab.org<mailto:rmiller at jlab.org>>; David Kashy <kashy at jlab.org<mailto:kashy at jlab.org>>; Marco Battaglieri <battagli at jlab.org<mailto:battagli at jlab.org>>
Subject: Re: Hall B Sc magnets run

Hello Probir,

I have an issue with leaving magnets ON over thanksgiving breaks with no one in the counting room and the hall in “Restricted access”. What is the purpose of leaving them ON over that period.

Thanks, Stepan

On Nov 22, 2019, at 9:03 AM, Probir Ghoshal <ghoshal at jlab.org<mailto:ghoshal at jlab.org>> wrote:

Dear Denny and Team

As discussed this morning, HallB is scheduled to get the beam on Dec2nd 2019.
Denny on Vacation till 2nd Dec and Dave and Bob will also be away from Lab.
In order to run the magnets to full field on Dec 2nd, the following is suggested-

  1.  HOT check out (magnets) - Eugene P (sign off) Wednesday Morning/afternoon (27th Nov 2019)
  2.  Magnet Sweep - Probir G and others (if available)
  3.  Run both magnets to full field and back down to 250 A and park over the Thanksgiving time. This will not impact any other system, members needs to be aware off the magnets at field and no work is allowed within the boundary.

Please let me know if you have concerns, else we go ahead with this as our schedule going ahead.
Please find the attached Fall 2019 run rota list for your ready reference.

All information regarding the checks carried out earlier last month is saved at the following location-
M:\hallb_eng\CLAS12\Magnets\Operations\Fall 2019 Run

Regards

Probir
<Physics Fall 2019_Spring 2020 Run_Cover for Halls_B-C-D v2.xlsx>

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