Deflection efficiency and energy loss distributions for high energy protons in a bent crystal

Abstract

Energy loss distributions and the deflection efficiency of 450 GeV protons during their passage through a (111) bent silicon crystal have been calculated by computer simulation. The path dependent stopping power and local electron density averaged along the particle trajectories were used to construct the energy loss spectra for the considered crystal layers. It was shown that the most probable energy loss for deflected particles and their straggling increase during the passage through the crystal part with increasing curvature. The observed characteristics of the calculated energy loss distributions for deflected and undeflected particles are in good agreement with experiment.