空间行波管热子电流的周期性波动  

Periodic fluctuation of heater currents in space traveling wave tubes

作　　者：李延威 尚新文 肖刘 赵建东 李宁 Li Yanwei;Shang Xinwen;Xiao Liu;Zhao Jiandong;Li Ning(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 101407,China)

机构地区：[1]中国科学院空天信息创新研究院,北京101407

出　　处：《强激光与粒子束》2023年第11期60-69,共10页High Power Laser and Particle Beams

基　　金：国家重点工程研究项目(2009ZYHD0001)。

摘　　要：针对空间行波管阴极预热过程中热子电流周期性波动的故障,建立热子等效电路估算了热子电流波动范围,采用激光测振频谱分析的手段测试了热子双螺旋结构的固有频率,进而完成了问题定位,对热子电流周期性波动进行了机理分析,阐明了热子电流发生周期性波动的条件,并提出了解决措施,同时从理论上定性分析了热子电流波动对空间行波管可靠性的影响,并通过试验验证了可靠性影响分析结论的正确性。During the cathode preheating process of a small amount of space traveling wave tubes(TWTs),there is a fault of periodic fluctuations in the heater current.In response to this problem,the range of fluctuation of heater current is estimated by creating the equivalent circuit of heater,and the natural frequency of heater double-helix structure is measured by using the laser vibration,thereby the localization of the problem is completed,and the mechanism of period fluctuation of heater current is analyzed,and the conditions under which the periodic fluctuation occurs are clarified,and the solutions are put forward.Meanwhile,theoretically,the qualitative analysis is conducted on the influence of heater current on the reliability of the space TWTs,and the correctness of the conclusion of reliability influence analysis is verified through experiments.

关 键 词：空间行波管 热子电流 周期性波动 双螺旋结构 固有频率 

分 类 号：TN124[电子电信—物理电子学]