Excitation of generalized Bernstein mode by interaction of two extraordinary electromagnetic waves

The excitation of a generalized Bernstein mode is studied by coupling two electromagnetic extraordinary modes, the frequencies of which are much higher than that of plasma. The complete dispersion relation is used to describe the Berstein mode propagation. In order to simplify the problem only the case of three co-linear waves is studied. Relativistic effects are not considered and it is assumed that the plasma is collisionless with a Maxwellian velocity distribution. (author)