利用一维Vlasov和Maxwell方程模拟激光等离子体相互作用

应用一维Vlasov和Maxwell耦合程序详细研究了激光等离子体相互作用中的基本问题——受激拉曼散射(SRS). 通过研究发现, SRS的产生与电子速度分布函数在相空间中的结构密切相关, 当电子速度分布函数形成相空间涡旋时,背向SRS光大幅增加,而当电子等离子体波相速度附近的电子速度分布函数曲线变平坦后, 背向SRS光基本停止发生. 在模拟中观测到了SRS的爆发、电子速度分布函数形成相空间涡旋、电子俘获等清晰的物理图像. 关键词： Vlasov-Maxwell模拟 受激拉曼散射

Study of laser plasma interactions using Vlasov and Maxwell equations

Stimulated Raman scattering (SRS), which is the basic problem in laser plasma interactions, was studied by a Vlasov-Maxwell code developed by us. It was found that, there is a close relation between the occurrence of SRS and the electron velocity distribution. When a vortex is formed in the phase space of electron velocity distribution, the amplitude of back SRS increases, and when the distribution function is flattened in the phase velocity of plasma waves, the SRS ceases. In our simulation, we clearly observed the pictures of the burst of SRS, the formation and vanishing of the vortex in the phase space of electron distribution function and electron trapping, etc.