?????????????ж????????? Compton?????????????

研究了强激光等离子体中多光子非线性Compton效应下阻尼电子与光子的散射特性,推出了其微分散射截面表达式。研究表明,尾波场的涨落和随机误差是电子发生纵向群聚的根本原因,且能引起电子更剧烈的群聚。电子横向动量的变化是引起电子和光子散射的根本原因,其微分散射截面随与一个电子同时作用的光子数的增大而减小,随散射非弹性成分的增大而迅速减小,但比激光场中的情况来得慢一些。只有当与电子同时作用的光子数与散射非弹性成分相等时电子才能被光场俘获。

Differential scattering section of multi-photon nonlinear Compton effect in high power laser-plasma

The scattering of the damped electron and photon with the multi-photon nonlinear Compton effect in the high power laser-plasma is studied.Its differential scattering section is also given.The result shows that the fluctuation and random error of Wiggler field are the basic factors which cause electron clustering in vertical direction in the plasma and can lead a consequent acuter electron clustering.The changes of the electron transverse momentum are the basic factors of electron and photon scattering,and their differential scattering sections are decreased with increasing of the quantity of photons which are active with an electron at the same time,and they are quickly decreased with the increasing of the inelastic scattering composition,but their change are slower than that in the situation dominated by laser field.When the active photon number with an electron at the same moment is equal to the inelastic scattering composition,the electrons can only be captured by the laser field.