Hi Tancredi,
I have a couple of questions and a suggestion. First, from Chris'
analysis, which TOF gives the peak count rate? The cross section goes
up at smaller angles but the solid angle goes down. Is there an
"optimum" angle? If there is, then we should recalculate the asymmetry
for that angle as a function of the lab angle of the target orientation,
as Jason did for the 23 deg scattering angle. We can then choose an
orientation angle where the asymmetry is maximum and fairly flat over
a range of orientation angles of 10-15 deg. At this setting, the
asymmetry from adjacent TOF paddles should be about the same over
a similar angular range because the q-angle changes about the same
as the scattering angle. Then we can add the contribution from
adjacent TOFs without significantly diluting the asymmetry and gain
a lot in statistics in a shorter running time.
John
-- John R. Calarco Dept. of Physics Univ. of New Hampshire Durham, NH 03824 phone: (603)862-2088 FAX: (603)862-2998 email: calarco@unh.edu
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