hey john and tancredi,
i just wanted to send you this plot. it shows the number of events in each tof from monte carlo. the largest number of events comes in the first tof (#0). note that in the data i think TOF#1 typically has more events in TOF#0, so... chris and i are working on this comparison tonight, so presumably we'll have more to say tomorrow.
have fun,
jason
John Calarco wrote:
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
-- -------------------------------------------------------------------- jason seely 26.650.b massachusetts institute of technology 77 massachusetts avenue cambridge, ma 02139-4307 email: seely@mit.edu phone: 617.253.4772/6734 html: web.mit.edu/seely/www --------------------------------------------------------------------
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