钨钡分配器阴极的微观结构及发射机理

IVESC 2004. The 5th International Vacuum Electron Sources Conference Proceedings (IEEE Cat. No.04EX839) Pub Date : 2004-09-06 DOI:10.1109/IVESC.2004.1414190

O. Getman, A. E. Lushkin, V. V. Panichkina, S. R. Rakitin

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引用次数: 1

摘要

研究了热真空处理(脱气活化)下钨粉分散性和钨骨架微观结构对阴极发射功率形成的影响。进行了发射光谱和俄歇光谱研究，获得了直流显微结构特征。推测直流发射功率与三维BaO- cao结构、单原子(BaO和Ba)膜和钨相表面过量氧的存在有关。

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Microstructure and mechanism of emission of W-Ba dispenser cathodes

The influence of tungsten powder dispersity and tungsten skeleton microstructure on the formation of emission power of dispenser cathodes (DC) under heat vacuum treatment, namely under degassing and activating was investigated. Emissive and Auger spectrometry investigations were carried and the DC microstructure characteristics were obtained. It is presumed that DC emission power is connected with the presence of three-dimensional BaO-CaO formations, monatomic (BaO and Ba) films and excess oxygen on the tungsten phase surface.

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来源期刊

IVESC 2004. The 5th International Vacuum Electron Sources Conference Proceedings (IEEE Cat. No.04EX839)

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