Femtosecond 240-keV Electron Pulses from Direct Laser Acceleration in a Low-Density Gas
Femtosecond 240-keV Electron Pulses from Direct Laser Acceleration in a Low-Density Gas
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DOI：
10.1103/physrevlett.111.224801
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发表时间：
2013-11-27
影响因子：
8.6
通讯作者：
Piche, Michel
中科院分区：
文献类型：
--
作者：
Marceau, Vincent;Varin, Charles;Piche, Michel
我们提出了一个简单的激光驱动的电子加速方案的基础上紧密聚焦的径向偏振激光脉冲的飞秒电子束团的生产与能量在几百keV的范围。在这种方法中，电子在聚焦体积中被激光脉冲的纵向电场分量向前加速。三维测试粒子和粒子在细胞模拟显示的可行性，产生良好的准直电子束的能量扩散为5%，持续时间的顺序为1 fs。这些结果为超快电子衍射实验提供了前所未有的时间分辨率。
We propose a simple laser-driven electron acceleration scheme based on tightly focused radially polarized laser pulses for the production of femtosecond electron bunches with energies in the few-hundreds- of-keV range. In this method, the electrons are accelerated forward in the focal volume by the longitudinal electric field component of the laser pulse. Three-dimensional test-particle and particle-in-cell simulations reveal the feasibility of generating well-collimated electron bunches with an energy spread of 5% and a temporal duration of the order of 1 fs. These results offer a route towards unprecedented time resolution in ultrafast electron diffraction experiments.