等离子体中大幅波与低频振荡粒子非线性相互作用效应

本文从Vlasov-Maxwell方程组出发,保留高频场到四级项,导得了纵、横波大幅高频场与低频振荡粒子拍频作用的动力学方程组。结果表明,在空间一维情况下,对亚声波,高阶大幅高频场的存在使形成Soliton的有质动力凝聚作用削弱,而对超声波则更不存在Soliton解;在三维情况下,似乎使Caviton形成变慢。关键词：

NON-LINEAR EFFECT ON THE LARGE AMPLITUDE WAVES INTERACTION WITH PARTICLES OF LOW FREQUENCY OSCILLATION IN PLASMA

In this paper, retaining high-frequency fields up to fourth order, the kinetic and hydrodynamic equations for the beat frequency interaction between longitudinal, transverse high-frequency fields and particles in low-frequency oscillation were derived from Vlasov-Maxwell equations. The results show that, in the case of one dimension, the large amplitude high order fields in sub-acoustic waves weaken the ponderomotive force which causes solitons. In three dimensions, it possibly makes the formation of cavitons slower.