Compton散射下超强激光等离子体中的坍塌  

Collapse in extra-intense laser plasma under Compton scattering

作　　者：张凯萍 毛建景 郝东山 

机构地区：[1]郑州工业应用技术学院信息工程学院,新郑451150

出　　处：《原子与分子物理学报》2016年第5期863-867,共5页Journal of Atomic and Molecular Physics

基　　金：河南省基础与前沿技术研究资助项目(142300410283)

摘　　要：应用强场理论、多光子非线性Compton散射模型和场论方法,对非线性Compton散射对超强激光在等离子体中坍塌的影响进行了理论分析,提出了将入射超强激光和多光子非线性Compton散射光作为超强激光在等离子体中坍塌的新机制,通过构造超强激光非线性控制方程的拉格朗日密度函数,给出了激光包络尺度变化的修正方程.结果表明:多光子非线性Compton散射加剧了激光包络调制不稳定性的非线性发展及物质密度局部稀化形成密度空穴的进程,使横等离激元和局部场强迅速增强,从而导致初始均匀分布激光场的剧烈坍塌.By using strong field theory,the model of multi-photon nonlinear Compton scattering and field theory means,the influences of the multi-photon nonlinear Compton scattering on the collapse of the extra-intense laser in plasma were analyzed theoretically,a new mechanism of the collapse produced by the extra-intense laser formed by incident extra-intense laser and the multi-photon nonlinear Compton scattering optical in plasma was put forward,then Lagrange’s density function on the nonlinear control equation of the extra-intense laser was structured,and the revised equation on the measure change of the wave packet of the laser field was given out.The results show that the nonlinear developing of the modulation instability on the laser field collapse and the progress of the density holes formed by the part density rarefied are accelerated by multi-photon nonlinear Compton scattering,and the transversal plasmons and the part field intense are quickly increased.Therefore,the acute collapse of the laser field of the initial uniform distribution is taken place.

关 键 词：超强激光 等离子体 坍塌 拉格朗日密度函数 多光子非线性COMPTON散射 

分 类 号：O534[理学—等离子体物理]