PRPM聚焦多注速調管電子光學系統(tǒng)的研究
Study on Electron Optics System of Multi-beam Klystron with PRPM Focusing
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摘要: 該文采用邊界元( BEM )軟件TAU對具有周期反轉永磁(PRPM)聚焦結構的多注速調管電子光學系統(tǒng)進行研究。通過編寫程序增加TAU讀入三維磁場數(shù)據(jù)的功能，從MAFIA中導入三維磁場，分別模擬了處于徑向不同位置處電子注的軌跡。通過對磁聚焦系統(tǒng)進行優(yōu)化設計，外層電子注軌跡得到明顯改善。使用軟件TAU進行三維模擬可以大大縮短模擬時間，便于多注速調管電子光學系統(tǒng)的工程設計。Abstract: Boundary Element Method(BEM) is applied to simulate electron optics system of multi-beam klystron with PRPM focusing in this paper. The function of importing 3D magnetic fields from MAFIA is added to TAU. Magnetic induction distribution along Z axis at different radial positions is given out and the electron trajectories are analysed. Optimization of the magnetic focusing system can decrease the radial magnetic induction and improve the electron beam quality. Less time will be needed than other codes, TAU become a very useful tool for multi-beam electron gun design.
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