specification for the uniform field region

[Jim Stewart <jstewart@jlab.org>]

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