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Re: specification for the uniform field region




Thanks, Jim, for correcting it ... I just looked at your drawing and 
compared to previous mails, asking myself why requiring a homogeneity 
better than 'perfect': 3x10^-4 is great! Now we have some real 
quantification - not only our Mainz-based estimates as in earlier 
versions.

Thanks

Franz

On Wed, 18 Feb 2009, Jim Stewart wrote:

>
> Sorry it should read 3 parts in 10,000 not 2 parts in 10,000.  Jim
>
>
> Jim Stewart wrote:
>> Hello Everyone
>> 
>> I have attached a sketch for what I propose for the uniform field region to 
>> use in the specification
>> for the tagger magnet. The required field uniformity would be 2 parts in 
>> 10,000 for any 2 points in
>> the hatched area less than 100mm apart and 1% over the whole hatched area. 
>> I would also like to
>> require the uniformity +/- 2mm above and below the horizontal plane.
>> 
>> Please let me know what you think?
>> 
>> Jim
>> 
>> ------------------------------------------------------------------------
>> 
>
>

===============================================================
                   Franz J. Klein, Associate Professor
                   CUA, Department of Physics
                   Washington, DC 20064
   office: Hannan Hall 206          phone: 202-319-6190
   or: Jefferson Lab,CC F-243       phone: 757-269-6671
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