大回旋电子注双磁会切电子枪的数值模拟

Numerical Simulation of Large Orbit Gyrotron Electron Beam Double CUSP Gun

该文分析了双磁会切电子枪的理论模型,建立了会切磁场模型,采用EGUN和MAGIC模拟,设计出了产生大回旋电子注的双磁会切电子枪,该枪的电子注速度比为1.38,轴向速度零散为3.7%。文中分析了电子注速度比、速度零散沿轴线的分布情况,进而讨论了不同的会切磁场变换宽度对电子注参量所带来的影响,为双磁会切电子枪设计的参量选择提供了依据。

Theoretical model of a double cusp gun is analyzed; model of magnetic cusp is built up. By using of EGUN and MAGIC, a double cusp gun producing large orbit gyration electron beam is designed, with beam velocity ratio of 1.38 and axial velocity spread 3.7%. The distribution of electron beam velocity ratio and axial velocity spread on axis is analyzed, then the variety magnetic cusp transition length affects on beam parameters is discussed, which provides some reference for double magnetic cusp gun design.