多注行波管周期永磁聚焦系统
Periodic permanent magnet focusing system for multi-beam traveling wave tube
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摘要: 利用自行开发的3维行波管仿真软件研究了五注耦合腔行波管周期永磁聚焦系统，分析了各个电子注通道内的静磁场分布和电子注聚焦性能。讨论了在有无初始横向速度的情况下各电子注的聚焦情况。并对外层电子注通道内的横向磁场的性质和其造成的对电子注聚焦的影响进行了分析,结果表明:该多注周期永磁聚焦系统具有良好的静磁场分布特性与电子注聚焦性能，在结构设计合理时，横向磁场对外层通道内电子注的聚焦影响很小，可以忽略。Abstract: Periodic permanent magnet focusing system for five-beam traveling-wave tube has been studied using the 3-D traveling-wave tubes simulation code developed by ourselves. Static magnetic field and beam transmission characteristics were analyzed . and the transverse magnetic field inside the outer beam tunnels and their effect on beam transmission were described. The results show that the PPM focusing system has good magnetic distribution and beam focusing capacity, when its structure is properly designed, the transverse magnetic field has little effect on outer tunnel beam transmission.
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