Character and application of Scandia Doped Dispenser cathodes with concave surfaces - 文章详情页

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Scopus

摘要：

Since　the　cathodes　with　concave　surfaces　are　required　for　the　practical　applications　in　most　high-power　vacuum　electron　devices,　characteristics　of　nanosized-Scandia　Doped　Dispenser　(SDD)　cathodes　with　concave　surfaces　have　been　investigated,　especially　in　dc　applications.　A　space　charge-limited　(SCL)　dc　current　density　of　over　50　A/cm2　has　been　measured　at　1000　°Cb.　An　on-going　life　test　with　a　dc　load　of　up　to　40　A/cm2　at　970　°Cb　has　been　completed　about　3000　hours　of　operation　to　date.　The　emission　performance　of　the　cathode　was　further　evaluated　in　an　electron　gun　test　tube,　which　is　a　part　of　an　mm　wave　CW-TWT,　before　the　practical　application　in　the　real　devices.　©　2015　IEEE.

关键词：

Electron Emission; Scandate cathode; Vacuum electron devices

作者机构：

[ 1 ] [Liu, W.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 2 ] [Yang, F.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 3 ] [Wang, Y.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 4 ] [Zhu, X.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 5 ] [Liu, X.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China
[ 6 ] [Wang, J.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, Beijing, 100124, China

通讯作者信息：

[Wang, J.]School of Materials Science and Engineering, Beijing University of Technology, 100 Pingleyuan, China

电子邮件地址：

wangjsh@bjut.edu.cn

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