High-efficiency water-window x-ray generation from nanowire array targets irradiated with femtosecond laser pulses

We demonstrate the high-efficiency generation of water-window soft x-ray emissions from polyethylene nanowire array targets irradiated by femtosecond laser pulses at the intensity of 4*10^19 W/cm^2. The experimental results indicate more than one order of magnitude enhancement of the water-window x-...

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Bibliographic Details
Published in:arXiv.org 2020-12
Main Authors: Shou, Yinren, Kong, Defeng, Wang, Pengjie, Zhusong Mei, Cao, Zhengxuan, Pan, Zhuo, Li, Yunhui, Xu, Shirui, Qi, Guijun, Chen, Shiyou, Zhao, Jiarui, Zhao, Yanying, Fu, Changbo, Luo, Wen, Zhang, Guoqiang, Yan, Xueqing, Ma, Wenjun
Format: Article
Language:English
Subjects:
Arrays
Efficiency
Energy conversion efficiency
Femtosecond pulses
Lasers
Nanowires
Particle in cell technique
Polyethylenes
Soft x rays
X-rays
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Summary:We demonstrate the high-efficiency generation of water-window soft x-ray emissions from polyethylene nanowire array targets irradiated by femtosecond laser pulses at the intensity of 4*10^19 W/cm^2. The experimental results indicate more than one order of magnitude enhancement of the water-window x-ray emissions from the nanowire array targets compared to the planar targets. The highest energy conversion efficiency from laser to water-window x-rays is measured as 0.5%/sr, which comes from the targets with the longest nanowires. Supported by particle-in-cell simulations and atomic kinetic codes, the physics that leads to the high conversion efficiency is discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.2012.08856