摘要
由增益的三维公式出发,对高斯光束时的小信号增益进行了分析。对电子束截面远大于光束截面情况给出了解析的增益渐近公式;对电子束截面远小于光束截面的情况。给出了解析的增益近似公式,结果与用计算机模拟所得相符。
A three-dimensional gain expression is presented and analysed for a Gaussian optical beam in small signal case. An asymptotic gain formula is given for a broader electron beam in cross section compared to the optical beam. When electron beam transverse dimension is smaller than the beam waist of the Gaussian mode, an analytic approximate formula is given and the results are in good agreement with numerical simulations.
出处
《强激光与粒子束》
EI
CAS
CSCD
1991年第1期95-101,共7页
High Power Laser and Particle Beams
关键词
自由电子激光
高斯光束
增益
free-electron laser , Gaussian optical beam, gain.
