The effects of self-fields on the electron trajectory in a two-stream free electron laser with a helical wiggler and an axial guiding magnetic field  

作　　者：S.Saviz E.Lashani Farzin M.Aghamir 

机构地区：[1]Plasma Physics Research Center,Science and Research Branch,Islamic Azad University,Tehran,P.O.Box 14665-678,Iran [2]Department of Physics,University of Tehran,N.Kargar Ave,Tehran 14399,Iran

出　　处：《Chinese Physics B》2012年第10期251-254,共4页中国物理B（英文版）

基　　金：Project supported by the Plasma Physics Research Center,Science and Research Branch,Islamic Azad University

摘　　要：A theory for the two-stream free-electron laser（TSFEL） with a helical wiggler and an axial guide magnetic field is developed.In the analysis,the effects of self-fields are taken into account.An analysis of the two-stream steady-state electron trajectories is given by solving the equation of motion.Numerical calculations show that there are seven groups of orbits in the presence of self-fields instead of two groups reported in the absence of self-fields.The stability of the trajectories is studied numerically.A theory for the two-stream free-electron laser（TSFEL） with a helical wiggler and an axial guide magnetic field is developed.In the analysis,the effects of self-fields are taken into account.An analysis of the two-stream steady-state electron trajectories is given by solving the equation of motion.Numerical calculations show that there are seven groups of orbits in the presence of self-fields instead of two groups reported in the absence of self-fields.The stability of the trajectories is studied numerically.

关 键 词：two-stream free electron laser electron trajectory 

分 类 号：TN248.6[电子电信—物理电子学] O463.1[机械工程—光学工程]