DocumentCode
3556867
Title
Emission degradation characteristics of coated dispenser cathodes
Author
Grant, Thomas J.
Author_Institution
Varian Associates, Inc., Palo Alto, CA
Volume
32
fYear
1986
fDate
1986
Firstpage
700
Lastpage
703
Abstract
This paper describes several fundamentally different characteristics of dispenser cathode emission degradation with time. This knowledge is important when predicting useful emission life in applications such as space tubes. The degradation characteristics include a gradual decrease in perveance, an overall work function distribution (WFD) change with time and a work function distribution change with temperature that also changes with time. Along with these effects, "apparent" cathode emission degradation caused by improper gun design is discussed.
Keywords
Cathodes; Crystallization; Degradation; Electrodes; Equations; Life testing; Mathematical model; Space exploration; Temperature distribution; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Electron Devices Meeting, 1986 International
Type
conf
DOI
10.1109/IEDM.1986.191289
Filename
1486547
Link To Document