Hi Michael,
Please note that in those runs you applied Cherenkov's cut they were
disconnected, instead of one box you had one tube!!!!!!!
After run# 2060 the Cherenkovs are back! :-))
Operators: kohlm yxiao karpiusp
Hi,
smooth data taking during shift from 16-24.
Switched to empty-target runs with run 2061, flipping helicity once per
run.
All good runs 1979-1986 1988-1994 1997 2000-2001 2003-2005 2007-2009
2011-2016 2018-2024 2026-2030 2032 2036 2037
2039 2041-2044 2047-2048 2050 2052-2053 2055-2060 analyzed with lrn.C,
flrn.C and charge.C.
Tried some analysis of cut variations. Without cuts, there are two
satellite peaks in zwl and zwr visible, presumably caused by a combination
of beam halo and ion polarimeter lenses.
The ghost peaks almost disappear after applying "good" cuts
"thetaw+momw+coplaw+zlrw+pleftw+erightw+InvMass_elas_R" (right sector)
"thetaw+momw+coplaw+zlrw+eleftw+prightw+InvMass_elas_L" (left sector).
Additionally, a tighter "zlrw" cleans up the rest of the satellite peaks.
Asymmetry and counts spectra are attached. The asymmetries are very small.
I applied a loose Cerenkov cut on the electron arm (ncl/r>-1). This cut
cleans up most of the satellite peak even without the other cuts, however
the efficiency seems to be small. Corresponding asymmetry/counts plots for
this addidtional cut on the Cerenkov is attached, too.
MK
-----------------------
Octavian F Filoti
Nuclear Physics Group
Univ. of New Hampshire
9 Library Way
Durham, NH 03824
phone: (603)862-1691
FAX: (603)862-2998
email: ofiloti@unh.edu
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