Kyryllin I. Mechanisms of deflection of high-energy charged particle beams by bent crystals

The thesis focuses on the process of scattering of high-energy charged particles in straight and bent crystals oriented with respect to the incident particle at a small angle to one of the main crystal axes or planes, and comparative analysis of the main mechanisms of high-energy charged particles deflection by means of bent crystals. The analytical expression for the continuous potential and field strength of crystal atomic strings and crystal atomic planes in the Doyle-Turner model of atomic potential was obtained. The model of incoherent scattering of fast charged particles on the nuclei of the crystal atoms and crystal electronic subsystem account was developed. Theoretical analysis of the formation of angular distributions of charged particles in an oriented crystal and diffusion of fast charged particles in a crystal in the plane that is orthogonal to one of the main crystal axes were developed. The theoretical model in which it is possible to carry out a comparative analysis of different mechanisms of charged particles deflection by a bent crystal was proposed. The equation of motion of fast charged particle in the field of bent crystal atomic strings and bent crystal atomic planes was obtained. A comparative analysis of the efficiency of deflection of positively and negatively charged particles by bent crystals through three main deflection mechanisms was carried out.