Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
High energy electrons emitted by water plasmas produced by a single or a multiple laser pulse are investigated. The multipulse mode greatly enhances the generation and the temperature of hot electrons. Directional emission of high energy electrons over 25 keV is observed in two symmetric directions with respect to the laser axis and at 46degrees from the directions of the laser electric field. Two-dimensional particle-in-cell simulations reproduce well the experimental results and indicate that the acceleration mechanism of the high energy electrons is due mainly to the resonance absorption at the edge of the spherical droplets formed by the leading pulse.
Li, YT,Zhang, J,Sheng, ZM,et al. Spatial distribution of high-energy electron emission from water plasmas produced by femtosecond laser pulses[J]. PHYSICAL REVIEW LETTERS,2003,90(16):165002.
Li, YT.,Zhang, J.,Sheng, ZM.,Teng, H.,Liang, TJ.,...&唐孝威.(2003).Spatial distribution of high-energy electron emission from water plasmas produced by femtosecond laser pulses.PHYSICAL REVIEW LETTERS,90(16),165002.
Li, YT,et al."Spatial distribution of high-energy electron emission from water plasmas produced by femtosecond laser pulses".PHYSICAL REVIEW LETTERS 90.16(2003):165002.