Quasilinear theory of the inversionless generation of electron cyclotron radiation

A study is made of the parametric generation of cyclotron radiation by a modulated electron ensemble that is stable against the generation of a monochromatic field - the classical effect characteristic of an inversionless maser. A quasilinear theory of inversionless cyclotron instability is developed. It is shown that, during quasilinear diffusion, the system of a modulated electron beam and an electromagnetic field relaxes to a certain steady state.