Flux effect on an aligned second foil due to multiple scattering of 800-MeV protons in the leading foil

The high penetrating power of 800-MeV protons in metal samples invites considering aligning several samples along the beam direction in order to best utilize available experimental volume and to achieve uniform dose, sample to sample. Multiple scattering of the protons within each foil is the limit on the number and/or the geometry of the foils that will receive uniform dose. This calculation estimates the flux effect on an aligned second foil due to multiple scattering in a leading foil. The numerical results shown are for a given geometry of aluminum foils. Determination of a particular geometry and knowledge of the radiation length of a given material allows extension of this calculation