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Title: Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets

Abstract

The influences of lateral target size on hot electron production and electromagnetic pulse emission from laser interaction with metallic targets have been investigated. Particle-in-cell simulations at high laser intensities show that the yield of hot electrons tends to increase with lateral target size, because the larger surface area reduces the electrostatic field on the target, owing to its expansion along the target surface. At lower laser intensities and longer time scales, experimental data characterizing electromagnetic pulse emission as a function of lateral target size also show target-size effects. Charge separation and a larger target tending to have a lower target potential have both been observed. The increase in radiation strength and downshift in radiation frequency with increasing lateral target size can be interpreted using a simple model of the electrical capacity of the target.

Authors:
; ; ; ; ;  [1];  [2]
  1. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China)
  2. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)
Publication Date:
OSTI Identifier:
22068917
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 19; Journal Issue: 11; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTROMAGNETIC PULSES; ELECTRONS; EXPERIMENTAL DATA; LASER RADIATION; LASER TARGETS; SURFACE AREA

Citation Formats

Chen Ziyu, Li Jianfeng, Yu Yong, Li Xiaoya, Peng Qixian, Zhu Wenjun, and Wang Jiaxiang. Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets. United States: N. p., 2012. Web. doi:10.1063/1.4767910.
Chen Ziyu, Li Jianfeng, Yu Yong, Li Xiaoya, Peng Qixian, Zhu Wenjun, & Wang Jiaxiang. Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets. United States. doi:10.1063/1.4767910.
Chen Ziyu, Li Jianfeng, Yu Yong, Li Xiaoya, Peng Qixian, Zhu Wenjun, and Wang Jiaxiang. Thu . "Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets". United States. doi:10.1063/1.4767910.
@article{osti_22068917,
title = {Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets},
author = {Chen Ziyu and Li Jianfeng and Yu Yong and Li Xiaoya and Peng Qixian and Zhu Wenjun and Wang Jiaxiang},
abstractNote = {The influences of lateral target size on hot electron production and electromagnetic pulse emission from laser interaction with metallic targets have been investigated. Particle-in-cell simulations at high laser intensities show that the yield of hot electrons tends to increase with lateral target size, because the larger surface area reduces the electrostatic field on the target, owing to its expansion along the target surface. At lower laser intensities and longer time scales, experimental data characterizing electromagnetic pulse emission as a function of lateral target size also show target-size effects. Charge separation and a larger target tending to have a lower target potential have both been observed. The increase in radiation strength and downshift in radiation frequency with increasing lateral target size can be interpreted using a simple model of the electrical capacity of the target.},
doi = {10.1063/1.4767910},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 11,
volume = 19,
place = {United States},
year = {2012},
month = {11}
}