Strong turbulence effects on the kinetic beam-plasma instability

The results of a series of one-dimensional fully kinetic Vlasov simulations on the effect of strong turbulence on the kinetic beam-plasma instability are presented. Previous results on the initial stabilization of the instability from a different simulation code are confirmed. Past this initial stabilization, it is shown that if the energy in the beam resonant waves at stabilization exceeds 0.1 to 0.2 of the initial thermal energy, strong coupling of the high frequency fields to the electrons takes place. The localized field structures and ion cavities that are formed are short-lived and the beam-plasma instability can periodically reappear. If this level is not exceeded, the coupling to the electrons is reduced and the structure formed by the strong turbulence is more stable. The variations in time of the beam resonant waves are also reduced.