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采用多级降压收集极回收经过互作用后的电子注的剩余能量是提高行波管效率的有效途径之一。效率与电子回流是多级降压收集极的两个非常重要的指标。多级降压收集极的设计离不开计算机辅助设计软件,对收集极进行精心的电子光学设计,可以改善二次电子发射对效率及回流的影响。通过定性地分析收集极与整管效率的关系、废电子注特性、磁再聚焦区的构造及二次电子发射规律,为收集极的设计提供了参考方法。
It is an effective way to improve the efficiency of TWT by using multi-stage buck collector to recover the remaining energy of the electron injection after the interaction. Efficiency and electronic reflux are two very important indicators of multi-stage buck collectors. Multi-stage buck collector design is inseparable from the computer-aided design software, the collector for careful electronic optical design, can improve the secondary electron emission efficiency and return. By qualitatively analyzing the relationship between the collector and the efficiency of the whole tube, the characteristics of the waste electron injection, the structure of the magnetic refocusing zone and the law of secondary electron emission provide a reference method for the design of the collector.