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Hello Stepan,
 Thanks for the confirmation. I will produce a scaled field for use
in simulating and reconstructing the data taken during the 2014
commissioning run.
 When you say "Tosca maps reproduce field in the region of 
the yoke very well " I assume that you mean that propagating
to the ECal should be fine.
Norman

-----Original Message-----
From: Stepan Stepanyan [mailto:[log in to unmask]] 
Sent: Thursday, February 12, 2015 1:31 PM
To: Graf, Norman A.; 'Stepan Stepanyan'
Cc: hps-software
Subject: Re: Field Map

Hi Norman,

This is correct, but both maps will need some scaling.
For example we run at 503.325A in December that will be 0.3279T central field, therefore values in 125acm2_3kg should be multiplied by 0.3279/0.303.

Also, please note that we now discovered the known old problem - Tosca maps reproduce field in the region of the yoke very well, but overestimate tails. This will not be important for the tracker, but effects beam direction and relative setting of the frascaties and the analyzing magnet.

Stepan

On 2/12/15 2:53 PM, Graf, Norman A. wrote:
> Hello Stepan,
>   Is the field map data in
>
> 125acm2_3kg.table
>
> the most current values to use for the commissioning run in December 2014?
>
> And is
>
> 209acm2_5kg.table
>
> the appropriate file to use for the upcoming engineering run?
> Thanks,
> Norman
>

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