超强激光与等离子体作用中的能量输运  

Energy transport on effect of extra-intensity laser and plasma

作　　者：郝东山 姚迎乐 

机构地区：[1]郑州工业应用技术学院信息工程学院,河南新郑451150

出　　处：《光学技术》2015年第1期22-26,共5页Optical Technique

基　　金：河南省基础与前沿技术研究资助项目(092300410227)

摘　　要：应用多光子非线性Compton散射模型和数值计算方法,研究了Compton散射对超强激光与等离子体作用中能量输运的影响,提出了将Compton散射光和入射超强光作为电子能量输运的新机制,给出了电子热传导新模型和能量输运数值计算结果。结果表明:散射使等离子体中Weibel不稳定性和自生磁场增强效应导致耦合光传输方向的电子密度显著减小,更多激光能量以热流形式分布在横向方向。散射使电子吸收能量的时间缩短和自生磁场线性阶段最大增长率增大效应导致等离子体表面处沿耦合激光横向方向的热流几乎被完全限制,电子在激光传输方向的能量显著增加。By using the model of multi-photon nonlinear Compton scattering and value computing means,the influences of Compton scattering to the energy transport in the effect of the extra-intensity laser and plasma is studied. A new mechanism on the of electron energy transport produced by Compton scattering optical and incident extra-intense light is given. A new model of the electron thermal propagation and the number result of energy transport are given out. The results show that the electron density in the coupling propagation direction is markedly decreased by the Weible instability and the increased effect of the saturated self-genetic magnetic field produced by Compton scattering,and even more laser energy is dispersed on transverse direction with thermal current form. The all thermal current along the transverse direction of the coupling laser near plasma surface is almost limited by the effects of the time cutting short and the maximum rise rate increasing in the linear stage of the self-genetic magnetic field produced by Compton scattering. The electron energy in the laser propagation direction is markedly increased.

关 键 词：超强激光 激光等离子体 自生磁场 耦合 Weibel不稳定性 多光子非线性COMPTON散射 

分 类 号：O524[理学—高压高温物理] O434[理学—物理]