摘要
本文利用单粒子理论给出了返波型自由电子激光的小信号理论。通过引入修正因子F_m,常规自由电子激光的一系列公式可以用于返波自由电子激光。结果表明:返波FEL具有效率高及束质要求低两大优点,故适宜于作为两级自由电子激光中的一级。
A detailed analysis for the backward wave free electron laser (FEL) in small signal regime is conducted, following the single partical approach. By the use of a modified factor Fm, the formulas resulted are similar to those of normal FELs. To compare with normal FELs, these formulas show that the backward wave FELs have two main features: the high energy conversion! effeciency and the loose e-beam quality requirement. So it is suitable to be one stage of the two-stage FEL.
基金
国家自然科学基金
