Subject: 2pass elastic resolution-simulation
From: "Konrad A. Aniol" Date: Wed, 17 Oct 2007 11:48:56 -0400
 To: "Guido.Maria.Urciuoli@roma1.infn.it" , Arun Saha , Jose M Udias , Juan Carlos Cornejo , Joaquin Lopez

Dear colleagues, Here are the geant results for the resolutions for the 2 pass elastic run.
The beam energy is 1344 MeV, 12.5 deg, 83.5 mg/cm2 carbon target, assumptions:

 horizontal angle resolution = 0.3e-3 radians
 vertical angle resolution = 1.0e-3 radians
 dp/p = 1.0e-4 raster correction is perfect for a 4mmx4mm raster.
 target angle = 30 deg full acceptance in angle

HRSR FWHM = 0.4 MeV, HRSL FWHM = 0.5 MeV

The attached ps file shows the superposition of the spectra. The elastic scattering has been kinematically corrected in the paw analysis. The spectrum in HRSL is shifted to lower energies presumably because of the target angle which provides a shorter path for HRSR compared to HRSL. HRSR is the solid line, HRSL is the dashed line. We have Jose's elastic scattering calculations which we will incorporate into the paw analysis to calculate the average cross sections.

 Konrad

2pass elastic spectra