The ytar cuts were restriced to reduce events from multiple scattering from being used in the optimization.  The graphical ytar cuts were previously approximately 1mm wide, and were reduced to approximately 0.5mm.  The new matrix element file is new_sos_matrix_1200.dat.  The delta matrix elements in the new matrix are the SAME as the 900 matrix.

CMOP optimization results 06/15/05

The SOS was at 1.2 GeV for the plots below.
Follow the link for the template for the xptar and yptar plots.
All plots include beam and target offsets

• The blue line in ytar corresponds to y of the foil in the sos frame at z_sos=zzero (the sos z coordinate where the beam intersects the target).
• The light blue line in xptar and yptar is the difference between the reconstructed quantities and the value calulated from the sieve hole and the beam-target intersection point.

The zeroth order matrix element (a constant offset) is not included.  This is due to spectrometer mispointing and needs to be inserted into SIMC.  Spectrometer mispointing can be determined from runs with the z=0 target, Al dummy or possibly even the cell walls of cryotargets.  The SOS can swing by up to 2mm during rotations, which is not repeatable, and so the mispointing needs to be determined at each spectrometer setting.