Double Jet Emission of Hot Electrons from a Micro-droplet Spray
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PENG Xiao-Yu,
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ZHANG Jie,
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LIANG Tian-Jiao,
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SHENG Zheng-Ming,
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JIN Zhan,
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LI Yu-Tong,
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WANG Zhao-Hua,
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YU Quan-Zhi,
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ZHENG Zhi-Yuan,
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LIU Yun-Quan,
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WU Hui-Chun,
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HAO Zuo-Qiang,
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YUAN Xiao-Hui,
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WEI Zhi-Yi
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Abstract
Spatial distribution of hot electrons with energies above 50 keV are investigated by an ethanol micro-droplet spray irradiated by linearly and elliptically polarized 150 fs laser pulses at an intensity of 1016W/cm2. Two symmetric hot electron jets with respect to the laser propagation direction are observed in the polarization plane for a linearly polarized laser field and in the plane of the long electric vector for an elliptically polarized laser field, respectively. Particle-in-cell simulations suggest that the resonance absorption on the spherical surface of the droplets is mainly responsible for the generation of the double-jet emission of hot electrons.
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