NONLINEAR-THEORY OF CYCLOTRON MASER RADIA TION

Cyclotron maser radiation, which according to a present knowledge is r esponsible for some kinds of radiofrequency emission from the Sun, pla nets and stars was considered. Using a three-wave representation, a se t of equations for energy density of high-frequency modes were derived with account for the main nonlinear effects. Along with known effects , the equations obtained also describe those, not discussed in the lit erature previously. Some quantitative estimates, showing the relative role of different terms in the equations, were given for the case of t he solar flares.