摘要
为了研究多光子非线性Compton散射对飞秒激光退吸附作用对等离子体通道寿命的影响,应用多光子非线性Compton散射模型和强飞秒激光在空气中产生等离子体通道内带电粒子动力学模型,提出了多光子非线性Compton散射是影响等离子体辐射阻尼和通道寿命的一个重要机制,给出了等离子体通道中带电粒子的修正动力学方程,并进行了数值计算和实验研究.结果表明:散射削弱了自由电子对氧分子的吸附和正负离子的复合,有效地补偿了等离子体的辐射阻尼效应,后续激光脉宽和间隔以及Compton散射是影响等离子体辐射阻尼和通道寿命的关键因素,理论计算与实验结果较好的吻合.
In order to study the influences of the multi - photon nonlinear Compton scattering on the ptasma channel lifetime taken place by the dissociation attachment of femto - second laser, the multi - photon nonlinear Compton scattering is an important mechanism on the influencing radiation damping and channel lifetime of plasma is given out by using the model of the multi - photon nonlinear Compton scattering and model of the dynamics of the charged particle in plasma channel taken place by air by the high power femto - second laser, the revised dynamics equations of the charged particle in the plasma channel are given out, and these equations are calculated numberically and are studied experimentally. The results show that the attachment between the free electrics and 02 and complex between the positive and anion ions are decreased by Compton scattering, the radiation damping effect is effectively compensated, and the pulse widths and intervals in the rear laser and Compton scattering are the key factors on the influencing radiation damping and channel lifetime of plasma, and the caclulated results are in reasonable agreement with the experimental values.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2015年第1期125-128,共4页
Journal of Atomic and Molecular Physics
基金
河南省基础与前沿技术研究资助项目(092300410227)
河南省教育厅科学技术研究重点项目(12B520063)
作者简介
作者简介：冯光辉（1982-），男，河南西平人，讲师，主要从事信号传输研究．E-mail：156556096@qq．com
通讯作者：郝东山,E-mail：haodongshan1948@126．com
