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
收藏
页码：135 / +
页数：2
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