摘要
基于速度调制原理,发展得到了一种适用于折叠波导行波管的大信号理论.这个大信号理论将相位进行离散,将电子束根据相位离散为具有不同初始相位的宏粒子,计算每一电子束通道和电磁波通道相重合处电磁波对宏粒子的调制作用和能量交换,从而得到线路波的增长.与粒子模拟结果相比,该大信号程序所预言的输出功率误差在10%以内,饱和长度误差在15%以内.该方法可用于折叠波导行波管的设计计算和分析.
Based on velocity-modulating model, a nonlinear wave-beam interaction theory for folded-waveguide traveling wave tubes is developed. In this theory, the continuing beam is treated as discrete macro-particles with different initial phases. Then beam-wave interaction and energy exchange are analyzed at each crossing point between beam-tunnel and wave-tunnel. Compared with PIC result, the error of output power predicted by this model is within 10%, and the error of saturated length is within 15%. The results of this model are significant for designing folded-waveguide traveling wave tubes.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第24期232-237,共6页
Acta Physica Sinica
基金
国家杰出青年基金(批准号:61125103)
中央高校基本科研业务费项目(批准号:ZYGX2011J042)资助的课题~~
关键词
折叠波导
行波管
大信号理论
folded-waveguide, traveling wave tube, nonlinear beam-wave theory
