WAGFEL和FBC程序计算方波导自由电子激光放大器结果的对比分析  

COMPARISON AND ANALYSIS OF FREE ELECTRON LASER AMPLIFIER NUMERICAL RESULTS COMPUTED BY WAGFEL AND FBC CODE

作　　者：王泰春[1] 杨震华[1] 田世洪[1] 董志伟[1] 

机构地区：[1]北京应用物理与计算数学研究所,邮政编码100088

出　　处：《计算物理》1990年第1期50-60,共11页Chinese Journal of Computational Physics

摘　　要：本文推寻了在线极化条件下方形波导自由电子激光(FEL)放大器的非线性耦合方程组。把WAGFEL和FBC程序在常参数和变参数条件下计算TE_(01)模的结果进行了对比分析。分析结果表明,以实验条件和结果作标准,WAGFEL比FBC程序更切合实验实际,功能也更全。因此用WAGFEL程序初步计算的4MeV FEL放大器的理论数据对工程设计具有一定参考价值。In this paper, the equations of FEL amplifier with aplanar wiggler are derived. FBC code based on equations is designed by H.P.Freund. WAGFEL code based on KMR theory are designed by us. Although there are obvious differences between WAGFEL and FBC code, in dealing with practical problems such as magnetic field and length of the entry wiggler, initial distribution of electron beam, fashon of the downstream tapered wiggler etc, a set of c-oupled nonlinear differential equations used in two codes is based on single - particle theory. Meanwhile, under the certain conditions, the computational results of both WAGFEL and FBC code coincide with those of the experiment well. Then the computional results used by WAGFEL and FBC code are compared.The results of TE01 mode calculated with WAGFEL and FBC code are compared and analyzed under the condition of the constant and varyable amplitude of wiggler magnetic field Bw, respectively. The analyzed results show that regard the conditions and results of experiment as criterion, WAGFEL code is more useful in comparing similation results with experiment than FBC code. As a result, not only data of 4MeV amplifier which are computed by WAGFEL code are valuable, but WAGFEL code is feasible to design amplifier and study problems of FEL.

关 键 词：自由电子激光 放大器 方形 波导 

分 类 号：TN722.32[电子电信—电路与系统]