中国空间科学技术2017，Vol.37Issue(2)：103-107,5.DOI:10.16708/j.cnki.1000-758X.2017.0035
空间行波管阴极寿命试验研究
Study on life-test of M-type impregnated cathode for space TWT
邵文生 1李季 1于志强 1程诚 1张珂 1王辉 1王力山1
作者信息
- 1. 北京真空电子技术研究所,北京 100015
- 折叠
摘要
Abstract
Space travelling wave tube (STWT)with long life plays an important role on the power amplifier for satellite communication system. The life of the STWT is mainly restricted by the cathode life. In order to ensure that the STWT can have a long in-orbit operating time, it is necessary to carry out plenty experimental researches on the life of STWT cathode,and to predict the life of the STWT cathode.The accumulating life-test time is 1823080 hours for 50 electron guns,the longest life-test time is over 65411 hours.The life prediction model was built on the basis of the change of the work function during the life time.The predicting life is more than 43 years when the cathode is drawn a current density of 1 A/cm2 at 960℃b (℃b:brightness temperature), it is more than 22 years at 980℃b,and it is more than 15 years at 1000℃b.The predicting life shows that the long life STWT cathode can meet the requirements of the satellite communication system.关键词
空间行波管/阴极/逸出功/发射电流密度/寿命试验/寿命预测模型Key words
space TWT/cathode/work function/emission current density/life-test/life prediction model分类
信息技术与安全科学引用本文复制引用
邵文生,李季,于志强,程诚,张珂,王辉,王力山..空间行波管阴极寿命试验研究[J].中国空间科学技术,2017,37(2):103-107,5.
