激光极化态对激光等离子体中电子所受有质动力的影响

从理论上研究了线极化和圆极化超短超强激光脉冲对激光等离子体中电子所受有质动力的影响，得到了相应的解析表达式；通过单电子模型，比较了两种极化态的激光电场有质动力对电子纵向速度的影响．结果表明，线极化激光电场有质动力由于其振荡分量的存在要比圆极化对电子的加热更有效；电子因受振荡分量的作用而剧烈振荡，形成一个很强的纵向振荡静电场，产生静电场有质动力．

Effect of Polarization States of Laser on Ponderomotive Forces of the Laser-Produced Plasma Electrons

The influence of an ultra - short and ultra - intense laser pulse on the ponderomotive forces of the laser-produced plasma electrons is examined theoretically. Both linear and circular polarizations of the laser pulse are considered. Analytical equations of both polarization states of laser are derived. Using single - electron model, the influence of the ponderomotive forces produced by both polarized laser pulses on the longitudinal velocities of electrons is compared. The calculations show that the oscillation component of the pondermotive force produced by linear laser pulse is advantageous for hot electrons generation compared with the case of the circular polarization; the oscillation of electron is driven acutely because of the oscillation component, which a very strong longitudinal oscillating electrostatic field is obtained. In the same way, the electrostatic oscillating result simultaneously on an electrostatic pondermotive force.