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基于真空中单电子运动模型,编程计算得到了高斯激光脉冲与初始位于激光传播轴上电子的相互作用结果。不同激光参量条件下,得到了电子的能量增益与激光强度、焦斑大小和脉冲宽度关系。结果表明,高斯激光脉冲焦斑较大时,电子没有明显的能量增益,高斯激光脉冲焦斑太小时,电子也没有明显的能量增益。电子的能量增益有一个最佳焦斑大小。在相同激光强度下,电子能量增益的最佳焦斑大小随脉冲宽度的增大而增大,但最佳焦斑大小与脉冲宽度的比值基本上是不变的。
Based on the single-electron motion model in vacuum, the result of the interaction between the Gaussian laser pulse and the initial electron on the laser propagation axis was calculated. Under different laser parameters, the relationship between electron energy gain and laser intensity, focal spot size and pulse width was obtained. The results show that the electron has no obvious energy gain when the Gaussian laser pulse focal spot is large, and the electron has no obvious energy gain when the Gaussian laser pulse focal spot is too small. The electronic energy gain has a best focal spot size. Under the same laser intensity, the best focal spot size of electron energy gain increases with the increase of pulse width, but the ratio of the best focal spot size to pulse width is basically unchanged.