Figure 7.

Monte-Carlo simulations performed with the FLUKA MC code. (a) The protons enter through the entrance slit, are deflected by the $B_y=1.2$ T magnetic field, and 500 keV protons are selected by the exit pinhole. (b) Propagation of protons and deflection by the $B_x=0.2$ T magnetic field of MCP spectrometer. (c) and (d) Equivalent simulations including a 2 $\mathrm{\mu }$m Mylar target. Scattering in the target increases the proton divergence and only part of the beam is sampled by the entrance pinhole of the spectrometer.