电磁波泵自由电子激光的线性增益

LINEAR GAIN OF AN ELECTROMAGNETICALLY PUMPED FREE-ELECTRON LASER

假定电子具有螺旋轨道的条件,来用简单的迅级近似的方法。求解了电子的运动方程和能量方程,导出了电磁波泵自由电子激光的线性增益。呈现出电磁波泵自由电子激光所特有的性质,即工作在不同稳定轨道上具有不同的线性增益,且第一类稳定轨道的线性增益大于第二类稳定轨道的线性增益。

The electron motion and energy equations are solved by iteration under the assumption of the electron motion having a helical trajectory. And the linear gain of the electromagnetically pumped free-electron laser is derived. The linear, gain corresponding to the group ⅠI classes of trajectories is larger than that corresponding to the group Ⅱ classes of trajectories because of the effect of the axial-guide field in the electromagnetically pumped freeelectron laser. And this conclusion is peculiar to the electromagnetically pumped free-electron laser.