平面电磁波在均匀非磁化冷等离子体中传播过程的粒子模拟

The Particle Simulation of Planar Electromagnetic Waves Transmitting in Symmetrical Unmagnetized Cold Plasma

从磁流体动力学方程出发,计算均匀非磁化冷等离子体的色散关系,并采用PIC粒子模拟方法动态观察电磁波在其中的传播规律。理论和模拟结果均表明,只有在入射电磁波的频率高于等离子体频率(即ω>ω_p)时,平面电磁波才能在等离子体中传播;当0<ω<ω_p时,电磁波不能在等离子体中传播。

On the basis of magnetic hydrokinetic equations,this paper calculates the dispersion relations of symmetrical unmagnetized cold plasma,and observes the transmission rules of electromagnetic waves in it by the dynamic PIC parti- cle simulation method.Both the theory and simulation results show that it can transmit in plasma only when the frc quency of incidence electromagnetic waves is higher than that of plasma(ω>ω_p);under the condition of 0<ω<ω_p.it is impossible.