[Halld-tagger] plot of tagger orbits in mapping coordinate system

[Daniel Sober]

For guidance in mapping, here is a plot of electron orbits for 0.3, 1, 
3, 6, 9, 12 GeV in mapping coordinates.  The x and y scales differ by 
about a factor of 10 for ease in reading. The rectangle is the pole root 
(base of chamfer.)
For example, while we need field values extending to x = -14.5 cm to 
cover the full-energy orbit, we need measure only to about x = -10 cm 
for y > 200 cm or y < -200 cm.
Unfortunately, in the hard-to-measure region behind the flange near y = 
-300 cm, x > 0 we can use all the points we can get.

-- 
/Daniel Sober
Professor
Physics Department
The Catholic University of America
Washington, DC 20064
Phone: (202) 319-5856, -5315
E-mail: sober at cua.edu/
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