Electron Acceleration and Bunch Generation by Intense Femtosecond Laser Pulse in Preplasma of a Target

We present analytical studies of electron acceleration in the low-density preplasma of a thin solid target by an intense femtosecond laser pulse. Electrons in the preplasma are trapped and accelerated by the ponderomotive force as well as the wake field. Two-dimensional particle-in-cell simulations...

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Bibliographic Details
Published in:Communications in theoretical physics 2010-08, Vol.54 (8), p.359-364, Article 359
Main Author: 刘明萍 汪庆年 邓素辉 刘三秋 谢柏松
Format: Article
Language:English
Subjects:
低密度
强激光脉冲
电子加速
电子能量
能量传递
飞秒激光脉冲
高能电子束
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Summary:We present analytical studies of electron acceleration in the low-density preplasma of a thin solid target by an intense femtosecond laser pulse. Electrons in the preplasma are trapped and accelerated by the ponderomotive force as well as the wake field. Two-dimensional particle-in-cell simulations show that when the laser pulse is stopped by the target, electrons trapped in the laser pules can be extracted and move forward inertially. The energetic electron bunch in the bubble is unaffected by the reflected pulse and passes through the target with small energy spread and emittance. There is an optimal preplasma density for the generation of the monoenergetic electron bunch if a laser pulse is given. The maximum electron energy is inverse proportion to the preplasma density.
ISSN:0253-6102
DOI:10.1088/0253-6102/54/2/28