多光子非线性Compton散射对等离子体平面反射电磁波的影响

Influence of multi-photon nonlinear Compton scattering on plasma planar reflect electromagnetic wave

应用多光子非线性Compton散射模型和电磁波与等离子体相互作用模型,研究了Compton散射对等离子体平面反射电磁波特性的影响,提出了将Compton散射作为影响等离子体平面反射电磁波的机制,给出了等离子体平面反射电磁波反射率的修正方程,并进行了仿真实验.结果表明:不同频率下,低频段等离子体密度随电场强度增大而迅速增大,到达平衡态时间明显缩短,这是因散射使场强迅速增大,等离子体中粒子发生电离几率增大的缘故.高频入射波使反射波强度减低最多,最后几乎趋于0,这是因散射使等离子体频率高于入射波频率的成分大大增加的缘故.不同频率入射波的反射波频率有微小增大,这是因散射使信号与等离子体复合扩散时间尺度差距缩小,反射波的非线性效应逐步显现的缘故.随碰撞频率增大,低密度等离子体密度增加最快,到达平衡态时间最短,这是因散射使等离子体碰撞频率增大,有更多粒子参与电离的缘故.

By using the model of multi - photon nonlinear Compton scattering and the model of the effect between the electromagnetic wave and particle, the influence of Compton scattering on the characteristic of plasma planar reflect electromagnetic wave is studied, a mechanism of Compton scattering on the electromagnetic of plasma pla- nar reflect electromagnetic wave is produced, a revised equation of Compton scattering on the reflect rate of plas- ma planar reflect electromagnetic wave has been given out, and the equation is simulated by used the replica ex- perimentation. The results show that the plasma density in the low frequency part is quickly increased along with the increasing of the electric field intensity under the different frequencies, the time reached a parity is clearly cut, and the cause is that this field intensity is quickly increased by Compton scattering, the ionization probabili- ty of the particle in the plasma is increased. The reflect wave intensity is cut down at the most by the high fre- quency incident wave, the final intensity almost is O, and the cause is that the high plasma frequency produced by Compton scattering than the incident hght frequency. The reflect wave frequencies of the different frequencies incident waves are meagerly increased, the cause is that the gap of the time measure between the signal and the complex and diffusion of the plasma is decreased by Compton scattering, and the nonlinear effect of the reflect wave is progressively appeared. The density of the low density plasma is fastest increased along the collision fre-quency increasing, and the time to parity is the minimum, the cause is that the plasma collision frequency is in- creased by scattering, and the more particles are ionized.