多光子非线性Compton散射对等离子体中电子运动的影响

Influence on electron movement in laser-plasma produced by multi-photon nonlinear Compton scattering

应用多光子非线性Compton散射模型,研究了多光子非线性Compton散射对激光等离子体中电子运动的影响,提出了将入射激光和Compton散射光形成的耦合光、耦合光与等离子体产生的自生磁场形成的混合场作为加速电子的新机制,对电子动量和能量方程进行了修正和数值模拟。结果表明,当混合场的电场振幅与磁场振幅相等时,回旋共振电子在与混合场作用时间内能被加速到很高的能量;电子加速能量随耦合光幅值的增大而增大,随电子耦合初始角度的增大而周期变小,随电子横向耦合归一化初始速度的增大,开始时较快增加,之后缓慢增加,最后趋于稳定。

Using the model of multi-photon nonlinear Compton scattering, the influences on the electron movement in the plasma produced by the multi-photon nonlinear Compton scattering are studied, a new mechanism of the acceleration electrons in a mixed field produced by the coupling optical formed by the incident laser and scattered optical and the self-magnetic field formed by the action of the coupling optical and the plasma has been given out, and the momentum and energy equations of electrons are revised and simulated. The results show that when the amplitude of the electric field of the mixed field and its magnetic field amplitude is equal, the circle round resonance electron can be accelerated to very high energy in the action times of the circle round resonance electron and the mixed field. The electron accelerated energy is increased along with the increasing of the coupling optical peak value, the cycles of the energy change are decreased along with the increase of the coupling initial angle of the electron, and the accelerated energy is faster increased at the initial stage, then slowly increased, finally hastened stability state along with the increase of the coupling initial transverse speed of the electron.