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Emission properties of suprathermal electrons produced by laser–plasma interactions

Published online by Cambridge University Press:  26 October 2017

Huiya Liu ,
Ning Kang ,
Shenlei Zhou ,
Honghai An ,
Zhiheng Fang ,
Jun Xiong ,
Kun Li ,
Anle Lei  and
Zunqi Lin
Huiya Liu
Affiliation:
Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China University of Chinese Academy of Science, Beijing 100049, China ShanghaiTech University, Shanghai 201210, China
Ning Kang
Affiliation:
Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China University of Chinese Academy of Science, Beijing 100049, China
Shenlei Zhou
Affiliation:
Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Honghai An
Affiliation:
Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, China
Zhiheng Fang
Affiliation:
Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, China
Jun Xiong
Affiliation:
Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, China
Kun Li
Affiliation:
Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Anle Lei*
Affiliation:
Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, China
Zunqi Lin*
Affiliation:
Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ShanghaiTech University, Shanghai 201210, China
*
*Address correspondence and reprint requests to: Anle. Lei, Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai, 201800, China, E-mail: [email protected]; Zunqi Lin, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China, E-mail: [email protected].
*Address correspondence and reprint requests to: Anle. Lei, Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai, 201800, China, E-mail: [email protected]; Zunqi Lin, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China, E-mail: [email protected].
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Abstract

Suprathermal electrons produced by laser–plasma interactions at 0.53-μm laser wavelength have been investigated using 19 electron spectrometers. The targets were 2- and 10-μm-thick Al foils, while the laser average intensities were 2 × 1013 and 7 × 1014 W/cm2. A double temperature distribution was observed in the electron energy spectrum: the lower electron temperature was below 25 keV, whereas the higher was ~50 keV. The angular distribution of the total suprathermal electron energy approximately obeyed the Gaussian distribution, peaking along the k vector of the incident laser beam for perpendicular incidence. Furthermore, the conversion rate of laser energy into escaped suprathermal electron energy over the π sr solid angle was ~10−4 at $\sim \!\!10^{14} \; {\rm W}/{\rm c}{\rm m}^{\rm 2}$, increasing almost linearly with the laser intensity.

Keywords

inertial confinement fusionlaser–plasma interactionslaser-produced plasmasuprathermal electron
Type
Research Article
Information
Laser and Particle Beams , Volume 35 , Issue 4 , December 2017 , pp. 663 - 669
Copyright
Copyright © Cambridge University Press 2017 

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