APPLICATION OF AN IMPREGNATED CATHODE COATED WITH W-SC2O3 TO A HIGH-CURRENT DENSITY ELECTRON-GUN

被引：13

作者：

YAMAMOTO, S ^{[1
]}

SASAKI, S ^{[1
]}

TAGUCHI, S ^{[1
]}

WATANABE, I ^{[1
]}

KOGANEZAWA, N ^{[1
]}

机构：

[1] HITACHI LTD,MOBARA WORKS,MOBARA,CHIBA 297,JAPAN

来源：

APPLIED SURFACE SCIENCE | 1988年 / 33-4卷

关键词：

Coatings--Materials - Electron Guns - Metallic Compounds - Tungsten Alloys--Thin Films;

D O I：

10.1016/0169-4332(88)90435-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electron emission properties of a previously proposed W-Sc2O3-coated impregnated cathode are evaluated in a high current density electron gun. It is found that the cathode can be operated at a temperature 100-150°C lower than half of Os-coated impregnated cathodes usually operated at 1000°C for a beam average current density of approx. 5 A/cm2. The superiority of this cathode increases when used in high resolution, high brightness electron guns where the electron extracting field is high at the cathode surface.

引用

页码：1200 / 1207

页数：8

共 7 条

[1] CATHODE AND SCALING PROPERTIES RELATED TO THE SHAPE OF CURRENT VOLTAGE CHARACTERISTICS [J].