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分析了行波管电子枪和过渡区磁场设计的基本原理和方法,结合互作用区分别对高面积压缩比、低导流系数电子枪及其后的过渡区磁场进行改进和设计:首先对加辅助阳极的原电子枪和过渡区的周期聚焦磁场进行优化,在考虑热初速的情况下,对电子枪和磁场再度优化。模拟结果表明:辅助阳极能有效改善高面积压缩比、低导流系数电子枪产生电子注的层流性;电子热初速对电子注质量影响较大;合理的过渡区磁场能为互作用区提供符合要求的电子注。运用此设计对一螺旋线行波管进行模拟计算,达到了良好的效果。
The basic principle and method of traveling wave tube electron gun and transition zone magnetic field design are analyzed. Combining with the interaction zone, the magnetic field of high area compression ratio, low flow conductivity electron gun and its subsequent transition zone are improved and designed respectively. Firstly, Of the original electron gun and the transition zone of the periodic focus magnetic field optimization, taking into account the case of thermal initial velocity, the electron gun and magnetic field again optimized. The simulation results show that the auxiliary anode can effectively improve the high area compression ratio and the low flow conductivity electron gun produces the electron injection laminar flow. The electron thermal velocity has a great influence on the electron injection mass. The reasonable transition zone magnetic field can provide a good match for the interaction zone. Required electronic note. Using this design to simulate a spiral traveling wave tube, the good effect is achieved.