加反向导引场自由电子激光动力学理论

本文对加反向导引场自由电子激光加以描述，假定摇摆场是理想化的，分析电子的运动轨道，解得运动常数，求解符拉索夫方程得到扰动分布函数，从波方程可得色散关系，进而得增益公式，该公式近似适用于有导引场和无导引起的情况。

Dynamic theory of free-electron laser with a reversedaxial guide magnetic field

Free-electron laser amplifier with a reversed axial guide magnetic field is described and the idealied wiggler field is assumed. The trajectories of the electron are analysed. The motion constants and linearized Vlsov equation are solved,thus the perturbed distribution function is obtained. From wave equations dispersion equation and the gain for a monoenergetic beam also obtained. The gain is suited for with and without guide field. The last discussion indicates that FEL operation mechanism with reversed axial guide field naturely don't differ from with normal guide field.