Compton散射对斜入射激光脉冲在等离子体中传输的影响  

Influences of the propagation of obliquely incident laser pulse in plasma by Compton scattering

作　　者：刘安辉[1] 郝晓飞[2] 郝东山[2] 

机构地区：[1]黄淮学院电子科学与工程系,驻马店463000 [2]黄淮学院信息工程学院,驻马店463000

出　　处：《原子与分子物理学报》2011年第6期1075-1081,共7页Journal of Atomic and Molecular Physics

基　　金：河南省基础与前沿技术研究基金(092300410227)

摘　　要：应用多光子非线性Compton散射模型和等效折射指数模型,研究了Compton散射对斜入射激光脉冲在等离子体中传输特性的影响,提出了将入射光和Compton散射光形成的耦合光脉冲作为在等离子体中传输的新机制,用等效耦合折射指数和折射定律分别计算和数值模拟了等离子体中耦合光的反射和折射,结果表明,散射使等离子体中法拉第效应增强,产生了一个与折射界面平行的、较小等幅度附加折射波平面;使等效耦合折射指数的实部和虚部的实参数、折射角和等效折射指数之间的差异明显减小;使用等效耦合折射指数和折射定所得到的反射系数几乎均表现出相同的先增大后迅速减小的规律;使等离子体的反射系数随碰撞频率的增大而迅速减小,透射增强,透射增强的频率位置向高频明显移动.Using the multi-photon nonlinear Compton scattering model and effective refracted index mod- el, the influences of the propagation of the obliquely incident laser pulse in plasma by Compton scattering are studied,a new propagation mechanism in plasma on the coupling optical pulses formed by the incident light and scattered optical has been given out,and the refraction and reflection of the coupling optical in the plasma are computed and simulated by using the effective coupling refracted index and reflection low. The results show that the Faraday effect in the plasma is increased by Compton scattering, and a additional planes of the refraction wave of the parallel with the refraction surface and the littler and same extent are produced. The differences of the real parameter between the real part of the coupling refracted index and imaginary part and refracted angles and effective refracted index are clearly decreased. The changing law of the first increasing and then fast decreasing on the reflection coefficients gotten by using the effective coupling refracted index and reflection low are nearly same. The plasma reflection coeffi- cients are quickly decreased by Compton scattering along the refracted is increased,and the frequency places of the with the increasing of the collision frequency, refraction increasing are clearly moved to the high frequencies.

关 键 词：等离子体 等效折射指数 斜入射 耦合 多光子非线性COMPTON散射 

分 类 号：O431[机械工程—光学工程]