Vacuum electron acceleration by a tightly focused, radially polarized, relativistically strong laser pulse
Vacuum electron acceleration by a tightly focused, radially polarized, relativistically strong laser pulse
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DOI：
10.1134/s1063780x11060043
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发表时间：
2011-07-01
影响因子：
1.1
通讯作者：
Bychenkov, V. Yu.
中科院分区：
文献类型：
--
作者：
Bochkarev, S. G.;Popov, K. I.;Bychenkov, V. Yu.
一个测试粒子的方法是用来解决问题的直接电子加速的短，强烈的，径向偏振的激光脉冲的焦斑直径可以在激光波长的顺序。本文用Stratton-Chu积分描述了紧聚焦激光束的场，当傍轴近似不适用于激光场时，用该积分研究了电子加速问题。本文分析了电子在径向极化的相对论强激光场中的运动动力学，它取决于电子在激光束聚焦区的初始位置。根据激光脉冲聚焦的紧密性，研究了所产生的加速电子射流的性质。与使用线偏振激光脉冲相比，使用径向偏振激光脉冲加速带电粒子可能具有的优点进行了讨论。
A test particle approach is used to solve the problem of direct electron acceleration by a short, intense, radially polarized laser pulse the focal spot diameter of which can be on the order of the laser wavelength. The fields of a tightly focused laser beam are described in terms of the Stratton-Chu integrals, with which to investigate electron acceleration when the paraxial approximation is inapplicable to laser fields. The dynamics of electron motion in a radially polarized, relativistically strong laser field is analyzed depending on the initial position of an electron in the focal region of the laser beam. The properties of the generated jets of accelerated electrons are investigated depending on the tightness of laser pulse focusing. Possible advantages of using radially polarized laser pulses for charged particle acceleration, as opposed to the use of linearly polarized ones, are discussed.