Share Email Print
cover

Proceedings Paper

Thermionic emission investigation of materials for directly heated cathodes of electron tubes
Author(s): Bernd Gellert; W. Rohrbach
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Thermionic emission of new material compositions are studied. Combinations of rare earth materials and tungsten offer great potential as thermal electron emitter into vacuum. The thermal emission properties of these materials are studied and compared to thoriated tungsten as a well-known thermal emitter. The corresponding work functions and Richardson Dushman constants are evaluated. The chemistry involved and the emission mechanism are discussed.

Paper Details

Date Published: 1 May 1994
PDF: 4 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174603
Show Author Affiliations
Bernd Gellert, Thomson Elektronenrohren AG (Switzerland)
W. Rohrbach, Thomson Elektronenrohren AG (Switzerland)


Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum
Gennady A. Mesyats, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray