[Halld-tagger] First look at endpoint counters

[Daniel Sober]

I am finally back in production.  Here is a first look at the focal 
plane endpoint region with counters spanning equal energy widths of 30 
MeV, starting at a photon energy of 11.88 GeV.  The first "sensible" 
counter is number 7, which begins at 11.7 GeV,  but the goal of this 
study is to see whether we can extend closer to the endpoint.
The x axis scale is position relative to the nominal end of the focal 
plane, using the drawings sent by Alex.  Note that the 11.70 GeV ray 
crosses the focal plane very close to x=0, as it should.
The circles represent 1-inch-diameter PMTs.

Dan

-- 
/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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