Work

The goal of the project is the participation of young specialists from NSC KIPT in the research work conducted at CERN, GSI, DESY and other accelerator centers aimed at studying the effects which occur during high-energy charged particles passage through oriented crystals. The main objectives of the work are to study the processes of scattering of high-energy particles, the orientational dependences of their ionization energy loss and characteristic radiation in straight and bent crystals, as well as to develop new methods for determining the crystal orientation and monitoring the particle dechanneling process. The main tasks of the work: to find the dependence of distribution of the ionization energy loss of charged particles on the crystal orientation and basing on this dependence formulate the method for determining the crystal orientation relative to the charged particle beam; to find the dependence of distribution of the ionization energy loss of charged particles on the curvature radius of the bent crystal; to derive the cross section of fast charged particle scattering on a single plane in a thin bent crystal in the Born approximation of quantum electrodynamics, compare it with the corresponding cross section for a straight crystal, find the application limits for the Born approximation in this case; to obtain the interference term for the scattering cross section of fast charged particles on a crystal atomic plane in the eikonal approximation and analyze its contribution to this scattering cross section; to develop the method of computer simulation of the process of characteristic radiation by particles in an oriented crystal and on the basis of this method investigate the orientational dependence of characteristic radiation intensity at the particles incidence on the crystal and the influence of dechanneling process on characteristic radiation of the beam inside the crystal.