摘要
为了深入理解激光与等离子体相互作用时产生的密度孤波和自生磁场的形成机制,从动力论出发,数值模拟了从波-波、波-粒相互作用出发的轴对称柱坐标下的密度扰动非线性控制方程,得到了密度孤波和自生磁场的形成和演化过程。数值结果表明,强度为4×1014W/cm2的激光打靶时形成的孤波最大密度扰动率达到82%,并产生30T的自生磁场,与实验测量结果相符合,为密度孤波和自生磁场的形成提供了理论依据。
For exploring the mechanism of formation of density solitons and self-generated magnetic field in laser plasma, their evolution is numerically simulated by using of nonlinear equation for density disturbance in axial-symmetric cylindrical coordinate. The simulation results show that laser with intensity of 4 × 10^14 W/cm^2 irradiation on target produces solitons with density disturbance rate of 82%. At the same time, self-generated magnetic field about 30T along the propagation axes is induced. These results are consistent with observed results.
出处
《激光技术》
CAS
CSCD
北大核心
2007年第1期8-11,共4页
Laser Technology
基金
国家自然科学基金资助项目(10445007)
关键词
激光物理
密度孤波与自生磁场
模拟
坍塌
laser physics
density soliton and self-generated magnetic field
simulation
collapse
