Saturation of a High-Gain Single-Pass FEL.

Krinsky, S.

Technical Information Center Oak Ridge Tennessee

关键词: Free electron lasers;    Gain;    Saturation;    Performance;   

RP-ID  :  DE200415006737

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We study a perturbation expansion for the solution of the nonlinear one-dimensional FEL equations. We show that in the case of a monochromatic wave, the radiated intensity satisfies a scaling relation that implies, for large distance z traveled along the undulator, a change in initial value of the radiation field corresponds to a translation in z (lethargy). Analytic continuation using Pade approximates yields accurate results for the radiation field early in saturation.