ON THE NONLINEAR-THEORY OF THE CYCLOTRON MASER RADIATION - THE DOMINANT MODE

The linear growth rates of the high-frequency modes are calculated for strongly magnetized plasma with rapid non-equilibrium electrons chara cterized by the power energy distribution and the two-side loss cone. It is shown that within the wide-range electron energy spectrum (10 ke V < E < 200 keV) the first-harmonic extraordinary wave is the dominant mode for Y = omega(pe)/omega(Be) < 0.2 - 0.3, the lower hybrid wave i s the dominant mode for 0.2 - 0.3 < Y < 0.5 - 0.6, and the slow extrao rdinary wave is the dominant mode for 0.5 - 0.6 < Y < 0.9. All these m odes are shown to be generated by the different groups of the rapid el ectrons. The ranges of the parameters corresponding to the quasi-linea r relaxation of instability due to the quasi-longitudinal waves are de rived.