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首页> 外文期刊>Plasma and Fusion Research >Analysis of the Relativistic Ponderomotive Force and Higher-Order Particle Motion in a Non-Uniform Laser Field Using the Noncanonical Lie Perturbation Method
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Analysis of the Relativistic Ponderomotive Force and Higher-Order Particle Motion in a Non-Uniform Laser Field Using the Noncanonical Lie Perturbation Method

机译：非典型李氏摄动法分析非均匀激光场中相对论的动力和高阶粒子运动

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摘要

Relativistic particle motion in a non-uniform linearly polarized high intensity laser field is analyzed by using the noncanonical Lie perturbation method, which is based on the perturbation theory of the phase space Lagrangian. By introducing the smallness parameter ε as the ratio between the excursion length l and the scale length of the laser field amplitude L, the relativistic ponderomotive force and particle motion are derived up to the second order with respect to ε, which correspond to the nonlocal extension of the conventional ponderomotive force. Specifically, the particle is found to exhibit a betatron-like oscillation with long period characterized by the curvature of the laser field amplitude.
机译：利用基于相空间拉格朗日扰动理论的非经典李氏扰动方法，分析了非均匀线性偏振高强度激光场中的相对论粒子运动。通过引入小参数ε作为偏移长度l和激光场振幅L的标度长度之间的比率，相对于ε的相对论性动能和质点运动可以导出到二阶，这对应于非局部扩展传统的动力。具体地，发现该粒子具有以激光场振幅的曲率为特征的长周期的类似电子加速器的振荡。

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