摘要
应用Madey定理对双摇摆场自由电子激光的谐波特性进行了研究,导出了这种新型摇摆场结构自由电子激光高次谐波的自发辐射功率密度和小信号增益公式,以及电子与辐射场的耦合系数的表达式。计算结果表明,采用双摇摆场可以增强电子与辐射场之间的耦合,提高谐波的辐射强度和增益。而且在某些条件下,还可在轴上同时获得奇次和偶次谐波。
The harmonic property of dual undulator free-electron laser is analyzed by using Madeys theorem. The expression of harmonic spontaneous emission power density, small signal gain formula of this new type of undulator Free-Electron Laser, and the coupling coefficients between electrons and radiation field arc derived. From the numerical calculation results it is concluded that the couple between the electrons and the radiation field can be enhanced by using dual undulator, the harmonic spontaneous emission power density and gain hence are increased. Furthemore, under certain conditions, not only odd, but also even harmonic radiation on axis can be obtained.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1992年第6期630-636,共7页
Journal of University of Electronic Science and Technology of China
关键词
双摇摆场
自由电子
激光
谐波
dual undulator
free-electron
laser
harmonic
coupling coefficient
