Absorption of plasma waves in a tokamak

For the distribution of the particle density and magnetic field inherent in the tokamak type systems the results of the trajectories calculation are presented and also collisional and collisionless damping of plasma waves arising due to linear transformation of electromagnetic waves in the neighbourhood of the upper hybrid resonance. The decrement of collisional damping of waves has been calculated by the frequency of electron collisions, and for estimating collisionless damping connected with the presence of the wave vector projection on the magnetic field direction two factors have been taken into consideration: finiteness of the radiation pattern for electromagnetic waves producing a plasma mode of oscillations, and the rotational transformation of the magnetic field in a tokamak. A number of graphs is presented which show the position of the maximum energy release regions. A number of formulas for estimating wave absorption near the upper hybrid resonance is given