激光同步辐射作为阿秒X射线辐射源的特性研究

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Laser synchrotron radiation as attosecond X-ray source

1.
State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanism,Chinese Academy of Sciences,P.O.Box 800-211,Shanghai 201800,China;
2.
State Key Laboratory of Laser Technology,Huazhong University of Science and Technology,Wuhan 430074,China;
3.
Department of Optical Science and Engineering,Fudan University,Shanghai 200433,China

摘要: 研究了逆流相对论电子与激光脉冲相互作用获得激光同步辐射的频率上移、微分散射截面等特性。发现逆流相对论电子与短脉冲激光相互作用，可以获得阿秒X射线辐射脉冲。短脉冲激光条件下得到的后向散射光的频率上移与长脉冲激光条件下得到的后向散射光的频率上移是完全一致的，同时发现随着入射电子初始能量的增加，散射光的准直性越来越好，后向散射光脉冲的脉宽越来越短。
- 阿秒脉冲 /
- X射线 /
- 激光同步辐射 /
- 频率上移 /
- 后向散射
Abstract: The frequency upshifting and differential cross section of the laser synchrotron source (LSS) are studied based on the Thomson backscattering of intense laser radiation from a counterstreaming relativistic electron. A counterstreaming relativistic electron interacting with an incident short pulse laser emits attosecond X-ray pulse, the frequency upshifting of the backward scattered radiation under the short pulse laser is identical with that under the long pulse laser. The pulse width of the backward scattered radiation decreases with the increase of the electron’s initial energy, and the collimation of the scattered radiation becomes better.
- attosecond pulse /
- x-ray /
- laser synchrotron radiation /
- frequency upshifting /
- backscattering

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