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Title: Angular and energy distribution of fast electrons emitted from a solid surface irradiated by femtosecond laser pulses in various conditions

Abstract

Angular and energy distributions of fast electrons generated from the interaction of 60 fs, 795 nm laser pulses with aluminum targets have been experimentally investigated in various conditions. Increasing laser intensities from the nonrelativistic to the relativistic, a transition of the angular distribution of outgoing fast electrons from the specular reflection direction to the target normal has been observed for p-polarized laser irradiation. The fast electrons' energy spectrum at high laser intensity, e.g., approx2.6x10{sup 18} W/cm{sup 2}, consists of two peaks, which are found to originate from the target normal with low energy and specular reflection direction with high energy, respectively. By adding a prepulse to generate preplasma, the electron yields at the direction of the reflected laser can be greatly enhanced, and a double-peak angular distribution is observed. Besides, a more collimated electron emission peak in the specular reflection direction can be obtained by employing a larger f-number focusing system.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]
  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800 (China)
Publication Date:
OSTI Identifier:
21347138
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 17; Journal Issue: 2; Other Information: DOI: 10.1063/1.3299363; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; ANGULAR DISTRIBUTION; ELECTRON EMISSION; ELECTRONS; ENERGY SPECTRA; FOCUSING; LASER RADIATION; LASERS; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ELEMENTS; EMISSION; FERMIONS; LEPTONS; METALS; RADIATIONS; SPECTRA

Citation Formats

Wang Wentao, Liu Jiansheng, Cai Yi, Wang Cheng, Liu Li, Xia Changquan, Deng Aihua, Xu Yi, Leng Yuxin, Li Ruxin, and Xu Zhizhan. Angular and energy distribution of fast electrons emitted from a solid surface irradiated by femtosecond laser pulses in various conditions. United States: N. p., 2010. Web. doi:10.1063/1.3299363.
Wang Wentao, Liu Jiansheng, Cai Yi, Wang Cheng, Liu Li, Xia Changquan, Deng Aihua, Xu Yi, Leng Yuxin, Li Ruxin, & Xu Zhizhan. Angular and energy distribution of fast electrons emitted from a solid surface irradiated by femtosecond laser pulses in various conditions. United States. doi:10.1063/1.3299363.
Wang Wentao, Liu Jiansheng, Cai Yi, Wang Cheng, Liu Li, Xia Changquan, Deng Aihua, Xu Yi, Leng Yuxin, Li Ruxin, and Xu Zhizhan. Mon . "Angular and energy distribution of fast electrons emitted from a solid surface irradiated by femtosecond laser pulses in various conditions". United States. doi:10.1063/1.3299363.
@article{osti_21347138,
title = {Angular and energy distribution of fast electrons emitted from a solid surface irradiated by femtosecond laser pulses in various conditions},
author = {Wang Wentao and Liu Jiansheng and Cai Yi and Wang Cheng and Liu Li and Xia Changquan and Deng Aihua and Xu Yi and Leng Yuxin and Li Ruxin and Xu Zhizhan},
abstractNote = {Angular and energy distributions of fast electrons generated from the interaction of 60 fs, 795 nm laser pulses with aluminum targets have been experimentally investigated in various conditions. Increasing laser intensities from the nonrelativistic to the relativistic, a transition of the angular distribution of outgoing fast electrons from the specular reflection direction to the target normal has been observed for p-polarized laser irradiation. The fast electrons' energy spectrum at high laser intensity, e.g., approx2.6x10{sup 18} W/cm{sup 2}, consists of two peaks, which are found to originate from the target normal with low energy and specular reflection direction with high energy, respectively. By adding a prepulse to generate preplasma, the electron yields at the direction of the reflected laser can be greatly enhanced, and a double-peak angular distribution is observed. Besides, a more collimated electron emission peak in the specular reflection direction can be obtained by employing a larger f-number focusing system.},
doi = {10.1063/1.3299363},
journal = {Physics of Plasmas},
number = 2,
volume = 17,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2010},
month = {Mon Feb 15 00:00:00 EST 2010}
}