Numerical Study of the Instability in a Maxwellian Beam‐Plasma System II. Many Wave Regime

Abstract

The relaxation of the beam-plasma system with several preliminarily ercited unstable waves in its spectrum is investigated on the basis of computer simulations. The nature of the waves and particles interaction during the instnbility development is analysed. It is shown that the destroying of the nmplitude oscillations of the single wave after saturation in the presence of additional waves is caused by tho well known effect of resonance overlapping. A chaotization of the motion of the beam pnrticles occurs even in the case when the amplitudes of the neighbouring waves are small.