DocumentCode
2901010
Title
Correlation of surface composition with emission property for scandate-type cathodes
Author
Zhang, Ke ; Li, Ji ; Pan, Kexin
Author_Institution
Beijing Vacuum Electron. Res. Inst., China
fYear
2004
fDate
6-10 Sept. 2004
Firstpage
226
Lastpage
227
Abstract
In the paper, several kinds of scandate cathodes are investigated by means of AES and corresponded electron emission measurements. The purpose of these experiments is to clarify the relationship between the atomic ratios of surface active elements, namely, Sc and Ba, and electron emission of cathodes. The results of experiments indicate that the excessive or lacking content of surface Sc will lead to decline of electron emission, and only the surface Sc keeping proper content can contribute to excellent electron emission.
Keywords
Auger electron spectra; barium; cathodes; electron emission; scandium; AES; Ba; Sc; atomic ratios; electron emission measurements; emission property; scandate cathodes; surface composition; Anodes; Atomic measurements; Cathodes; Current density; Electron beams; Electron emission; Space charge; Space heating; Temperature; Tungsten;
fLanguage
English
Publisher
ieee
Conference_Titel
Vacuum Electron Sources Conference, 2004. Proceedings. IVESC 2004. The 5th International
Print_ISBN
0-7803-8437-7
Type
conf
DOI
10.1109/IVESC.2004.1414208
Filename
1414208
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