Direct Work Function Measurement of Activated M-Type Dispenser Cathodes

被引：0

作者：

Swartzentruber, Phillip ^{[1
]}

Balk, T. John ^{[1
]}

Tarter, James O. ^{[2
]}

Busbaher, Daniel ^{[2
]}

机构：

[1] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA

[2] Ceradyne Inc, Lexington, KY 40510 USA

来源：

IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE | 2014年

基金：

美国国家科学基金会;

关键词：

M-type; work function; Os-Ru; microstructure;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

M-type dispenser cathodes were activated in a vacuum chamber and the absolute work function determined from the contact potential difference between the cathode and a precisely calibrated probe tip. The experimental test setup allowed for cathodes to be activated and the work function measured without breaking vacuum. In addition to the commercially available Os-Ru coating from Ceradyne, Inc., a 3M Company, the work functions of Os-Ru coatings with engineered microstructures were measured to quantify microstructural influences. The work functions of both pre- and post-activation cathodes are presented and discussed in light of the microstructure of their Os-Ru coatings.

引用

页码：135 / +

页数：2

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