COHERENT PROCESSES IN BENT SINGLE CRYSTALS

摘要

Coherent process of scattering of ultrarelativistic particles by bent crystallo-graphic planes (volume reflection) is considered. The main characteristics of the process (as mean and mean squared angles of scattering and different distributions of scattered particles) are presented in the analytical form. Influence of incoherent stochastic process (volume capture) on the coherent particle scattering is studied. Another coherent process known as radiation of particles moving in an area of volume reflection is investigated. Calculations show the high value of radiation energy losses of electron and positron beams in a relatively large angle range. The peculiarities of this process in comparing with characteristics of well-known radiation processes in straight single crystals are discussed. On the basis of published experimental results the comparison of calculated and measured data is presented.