应用多光子非线性Compton 散射模型和数值模拟方法, 研究了正弦三角超强激光等离子的尾场对正电子加速, 提出了将入射超强激光和非线性Compton 散射光作为等离子体尾场对正电子加速的新机制, 给出了正电子加速能量修正公式和数值模拟结果。结果表明：使用非对称正弦三角激光脉冲的等离子体尾场加速正电子优于对称正弦三角激光脉冲的尾场情况, 散射使非对称正弦三角耦合激光脉冲宽度和上升长度与下降长度之比缩小, 正电子获得的加速能量显著增大。这是因为正电子频率增大, 横向速度各向异性分布增强, 尾场限制了正电子横向加速能量, 导致正电子在激光传输方向加速能量增大。

By using the model of multi-photon nonlinear Compton scattering and numerical simulating method, the positive electron acceleration in the wake field of the sine triangulation extra- intense laser- plasma is studied, a new mechanism on the positive electron acceleration in the plasma wake field produced by the incident extra- intense laser and nonlinear Compton scattered light is given, and the revised formula and numberical simulation results on the positive electron acceleration energy are given out. The results show that the acceleration effect on the plasma wake field of the extra-intense laser pulse of non-symmetry sine triangle to the positive electron is better than the plasma wake field of the extra- intense laser pulse of symmetry sine triangle, the width of the coupling laser pulse of the non- symmetry sine triangle and the ratio of the pulse increasing length and decreasing length is decreased by Compton scattering, and the acceleration energy of the positive electron is clearly increased. The causes that acceleration energy in the laser propagation direction of the positive electron is increased are that the positive electron frequency increases, the anisotropic distribution of the transverse speed of the positive electron is increased and the acceleration energy in the transverse direction of the positive electron is limited by the wake field.