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.
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November 2012
Research Article|
November 28 2012
Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets
Zi-Yu Chen;
Zi-Yu Chen
a)
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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Jian-Feng Li;
Jian-Feng Li
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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Yong Yu;
Yong Yu
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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Jia-Xiang Wang;
Jia-Xiang Wang
2
State Key Laboratory of Precision Spectroscopy, East China Normal University
, Shanghai 200062, People’s Republic of China
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Xiao-Ya Li;
Xiao-Ya Li
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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Qi-Xian Peng;
Qi-Xian Peng
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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Wen-Jun Zhu
Wen-Jun Zhu
1
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics
, Mianyang, Sichuan 621900, People’s Republic of China
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a)
Electronic address: ziyuch@gmail.com.
Phys. Plasmas 19, 113116 (2012)
Article history
Received:
August 18 2012
Accepted:
November 02 2012
Citation
Zi-Yu Chen, Jian-Feng Li, Yong Yu, Jia-Xiang Wang, Xiao-Ya Li, Qi-Xian Peng, Wen-Jun Zhu; Influence of lateral target size on hot electron production and electromagnetic pulse emission from laser-irradiated metallic targets. Phys. Plasmas 1 November 2012; 19 (11): 113116. https://doi.org/10.1063/1.4767910
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