Dependence of microwave generation on beam plasma system length

It is known from experiments [1, 2] that microwave oscillators on beam-plasma (BP) instabilities have the highest efficiency when exceeding of interaction space length or beam current over the threshold of BP systems takes place. The present work deals with numerical simulation research of the radiation dynamics dependence on interaction space length in the case of the Compton BP instabilities mechanism. The Compton instability in stabilized by capture of beam electrons by plasma wave [3].