磁聚焦多级降压收集极的设计及优化  

Design Optimization of Multi-stage Magnetic Focusing Depressed Collector

作　　者：申鑫[1,2,3] 苏小保[1,3] 唐康淞[1,3] 尚新文[1,3] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100039 [3]中国科学院电子学研究所空间行波管研发中心,北京101407

出　　处：《真空电子技术》2017年第1期48-53,共6页Vacuum Electronics

摘　　要：磁聚焦多级降压收集极能够更好地降低电子回流率同时提高收集极回收效率,对研制高效率空间行波管具有重要意义。利用电子科技大学研发的微波模拟器套装软件分析二次电子发射、聚焦磁场参数和收集级结构参数对磁聚焦收集极收集效率和回流率的影响。根据分析结果为某在研Ka波段100 W空间行波管设计四级磁聚焦降压收集极。优化后最终计算结果显示,在行波管电子效率为27.15%时,考虑二次电子发射收集极收集效率达到82.83%,行波管总效率达到68.46%。Multi-stage magnetic focusing depressed collector can lower backstreaming and improve collector efficiency, which is of great significance to develop high efficiency space traveling wave tube （TWT）. Using the Microwave Tube Simulator Suite （MTSS） software developed by University of Electronic Science and Technology, the influence of secondary electron emission, focusing magnetic field parameters and collector structural parameters on collector efficiency and backstreaming were analyzed. According to the analysis results, a four-stage magnetic focusing depressed collector for a 100 W Ka-band space TWT was designed. Final optimization results show that when the electron efficiency of the traveling wave tube is 27. 5%, the collector efficiency reaches 82. 83% and the total efficiency of TWT reaches 68.46% in consideration of secondary electrons emission.

关 键 词：磁聚焦多级降压收集极 电子回流率 收集效率 总效率 

分 类 号：TN124[电子电信—物理电子学]