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对曙光一号自由电子激光实验方案和结果进行了系统的理论分析和数值计算。首先用实测的束流发射度ε_N=0.36~0.63rad·cm论证了电子束可以不经调制而由束流传输段直接进入摇摆器达到有效产生自由电子激光。其次用编制的三维电子束传输程序模拟2kA强流束从加速器出口到摇摆的器入器传输过程。最后根据实测参数,使用CEBQ程序和WAGFEL程序,对曙光一号ASE实验、功率放大实验和磁场失谐曲线进行的计算表明,曙光一号束流发射度大约在印ε_N=0.61~0.8rad·cm附近;ε_N=0.8rad·cm时,上述实验与曲线的理论计算基本一致;曙光一号双向聚焦摇摆器设计是成功的;从功放结果分析,磁控管输入摇摆器的TEO1模的功率约为50W,并对下一轮实验提出了改进意见。
The theoretical analysis and numerical calculation are made on the experimental scheme and result of Free Electron Laser of Dawn No.1. First of all, the measured beam emittance ε_N = 0.36 ~ 0.63rad · cm demonstrates that the electron beam can be directly from the beam transfer section to the wobbler without modulation to achieve effective generation of free electron laser. Secondly, the 3-D electron beam transmission program was used to simulate the transmission process of the 2 kA strong beam from the accelerator exit to the wiggle. Finally, according to the measured parameters, using CEBQ program and WAGFEL program, the calculation of the Shuguang ASE experiment, the power amplification experiment and the magnetic field detuning curve shows that the beam emission of Shuguang 1 is about ε_N = 0.61-0. 8rad · cm near; ε_N = 0.8rad · cm, the theoretical calculation of the experiment and the curve is basically the same; Shuguang one bidirectional focus wiggler design is successful; from the amplifier results, the magnetron input wiggler TEO1 mode The power of about 50W, and the next round of experiments put forward suggestions for improvement.