In conditions that the laser gains can be obtained, the relations between the maximal allowable divergence Angle of incident electronbeam and other physical parameters are discussed.
在获得激光增益的条件下,讨论了入射电子束的最大许可发散角与其它物理参数之间的关系。
2
The effect of divergence of the incident electronbeam on the gain of FEL is analysed.