[Halld-tagger] PS magnet mapping requirements

[Alexander Somov]

Hello Richard,

As there are 5 hole probes mounted on the mapper (1 cm apart from
each other), I think that it would make sense to rotate 2 of them to 
measure Bz and Bx just for  consistency check. As the mapping
area is small, I would make the step size 1 cm.

If TOSCA agrees well for By, we'll use the whole map from TOSCA.

Cheers,
        Alex



On Wed, 26 Feb 2014, Richard Jones wrote:

> Alex,
>
> The plan looks good.  You ask at the bottom of the page whether one can
> rotate two of the probes to measure Bx and By.  You should be able to
> compute those from a map of Bz only, using the symmetry of the field and
> the fact that (del x B) = 0 in the region outside the coils and the iron.
> Is that what you want to check?
>
> -Richard J.
>
>
> On Tue, Feb 25, 2014 at 9:26 AM, Alexander Somov <somov at jlab.org> wrote:
>
>>
>> Hi,
>>
>> I've started putting requirements for mapping
>> the PS magnet to
>>
>> https://halldweb1.jlab.org/wiki/index.php/Plan_for_mapping_PS_magnet
>>
>> Please take a look.
>>
>> Cheers,
>>         Alex
>>
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>