激光与相对论电子束相互作用中阿秒X射线脉冲的产生

本文对激光与相对论电子束相互作用产生的阿秒X射线脉冲进行了研究.阿秒X射线脉冲是由于激光被相对论运动的电子束经过汤姆孙后向散射产生的.讨论了等离子体参数对产生的阿秒X射线的影响.发现其波长随着入射激光的频率的增加或电子束的速度增加而减小.选择合适的参数还可以获得"水窗"波段的X射线.还讨论了相对论电子束的密度与其前沿的密度梯度的大小对所产生X射线的转化效率的影响.关键词：阿秒X射线脉冲汤姆孙后向散射超强激光相对论电子束

Generation of attosecond X-ray pulse in the interaction between the pulses and the relativistic electrons

The attosecond X-ray pulse which is produced by the interaction between the laser pulse and the relativistic electrons is studied in this paper. The attosecond X-ray pulse is generated by Thomson backscattering from the relativistic electrons. It also discusses the effect of the plasma parameters on the attosecond X-ray. The wavelength of attosecond X-ray pulse becomes shorter when the frequency of the laser or the velocity of the relativistic electrons increases. We obtained the "water window" X-ray by selecting the appropriate laser and plasma parameters. This paper also discusses the effect of relativistic electrons density and density grad on the translation efficiency.