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-----Original Message-----
From: McCormick, Jeremy I. 
Sent: Monday, February 02, 2015 4:43 PM
To: 'Nathan Baltzell'
Cc: Graham, Mathew Thomas; Graf, Norman A.
Subject: RE: Bfield conditions

Hi, Nathan.

I'll CC a couple people who might be interested in this...

It was requested that I add B-field information to the conditions system.

https://jira.slac.stanford.edu/browse/HPSJAVA-312

So I was planning to just add a single table with...

current - the beam current in amps

field - measured field value in tesla or kG

scale - scaling factor of field map for the run

But I'm not sure where this information all comes from...

current - Will this be in the data stream for the upcoming runs?  Or should we access it through the MYA command line tool?  (Obviously prefer into the data stream.)

field - Field value at the IP or some other position?  When is this measured?  How do we get it automatically?  Or do we just input this manually?

scale -  I don't know how we get this number.  Is it derived from the current?  If it is derived should we even store it separately or just compute on the fly?

I can add the API regardless of whether we know how to get the information, but we should discuss how to access/load this information up front.

Thanks.

--Jeremy

-----Original Message-----
From: Nathan Baltzell [mailto:[log in to unmask]] 
Sent: Monday, February 02, 2015 4:33 PM
To: McCormick, Jeremy I.
Subject: Re: Bfield conditions

Chicane setting relative to nominal is in data catalog, done manually from the spreadsheet this time.  We also have magnet currents in epics.

This will be something that will be in the jlab mysql run db next time (in progress ...).



On Feb 2, 2015, at 7:23 PM, "McCormick, Jeremy I." <[log in to unmask]> wrote:

> I might have missed this someplace....
> 
> Do we have any B-field conditions for the runs?
> 
> Like current, scaling, etc.

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