Self-generated magnetic field in an amplitude modulated laser filament in a plasma
Self-generated magnetic field in an amplitude modulated laser filament in a plasma
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DOI：
10.1063/1.870757
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发表时间：
1994-04
影响因子：
2.2
通讯作者：
V. Tripathi;Chuan-Sheng Liu
中科院分区：
文献类型：
--
作者：
V. Tripathi;Chuan-Sheng Liu
有限光斑尺寸的短脉冲激光器被建模为在时间和横向维度上的振幅调制。激光对电子施加一个与时间相关的无旋有质动力Fp，赋予它们一个横向速度。当平衡等离子体密度有梯度时，电子流密度是无旋的，产生准静态磁场。等离子体加速器和移动电离前沿的过程的相关性进行了讨论。
A short pulse laser of finite spot size is modeled as an amplitude modulation in time and transverse dimension. The laser exerts a time‐dependent curl‐free ponderomotive force Fp on the electrons, imparting to them a transverse velocity. When equilibrium plasma density has a gradient ∇n0⊥Fp the electron current density is irrotational, producing a quasistatic magnetic field. The relevance of the process to plasma accelerators and moving ionization fronts is discussed.