三反射镜准光腔Smith-Purcell辐射的研究

三反射镜准光腔作为一种特殊准光谐振系统在特定模式具有较小的衍射损失,同时能有效提高电子注与高频场的互作用效率;采用中等能量的相对论环状电子注激励轴对称的、带有绕射光栅的三反射镜准光谐振系统可以得到相干Smith-Purcell辐射。采用2.5维全电磁粒子模拟程序对该器件进行了粒子模拟,在输入电压为50kV,输入电流为39.4A时,得到频率为97.2GHz,峰值功率为8kW的相干Smith-Purcell辐射输出。

Study of Three-Mirror Quasi-Optical Cavity Smith-Purcell Radiation

This paper describes a quasi-optical resonator complied with diffraction grating and 3-mirror reflector, which has considerable advantages as follow: ring beam enable more high beam current to transmit steadily and to be taken shape easily; three-mirror cavity has a small loss. Theoretical analyses and numerical simulation results indicate that coherent radiation can be achieved by beam energy of 50 kV and beam current of 39.4 A, and we have at 97.2 GHz, peak value are 8 kW Smith-Purcell output.