Karas' I. Excitation of Wake-Fields in Plasmas and their Applications for Charged Particle Acceleration and Formation of Kolmogorov Type Non-equilibrium Distribution

The dissertation is devoted to the theoretical study and numerical simulation of the excitation of wake-fields in plasma and their applications. It is first shown that in the magnetoactive plasma the accelerated bunch energy can appear essentially higher than the exciting bunch energy even if the longitudinal REB charge density profiling is not used. With the help of 2.5 D-numerical simulation of wake-fields excited by a single REB or a REB sequence it has first been established the folowing: i) the ion channel is formed in self consistent fields; ii) the self-modulation of a long pulsed REB is a very promising way both to obtain high rates of charged particle acceleration and to modulate the bunch and plasma densities. These results make it possible to clarify the prospects and to evaluate the possibility of creating new -type charged particle accelerators which will have acceleration rates much higher (2-3 orders) than the conventional resonant accelerator has.