In Situ Emission Microscopy of Scandium/Scandium-Oxide and Barium/Barium-Oxide Thin Films on Tungsten

Author

Vaughn, Joel M. ; Jamison, Keith D. ; Kordesch, Martin E.

Author_Institution

Ohio Univ., Athens, OH

Volume

56

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

794

Lastpage

798

Abstract

The effect of a thin Sc/Sc-oxide base layer on Ba/Ba-oxide electron emission, surface diffusion, adsorption, and desorption on W is studied using photoelectron emission microscopy and thermionic emission microscopy. A barium-on-scandium structure enhances both photo- and thermionic electron emission.

Keywords

adsorption; barium; barium compounds; desorption; electron emission; optical microscopy; photoelectron microscopy; scandium; scandium compounds; surface diffusion; thermionic electron emission; thin films; Ba-BaO; Sc-ScO; W; adsorption; barium-on-scandium structure; desorption; oxide base layer; oxide electron emission; photoelectron emission; photoelectron emission microscopy; surface diffusion; thermionic emission microscopy; Barium; Cathodes; Electron emission; Heating; Kinetic energy; Photoelectron microscopy; Scanning electron microscopy; Temperature; Thermionic emission; Tungsten; Photoelectron emission microscopy (PEEM); scandate cathode; thermionic cathode; thermionic emission microscopy (ThEEM);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2009.2015410

Filename

4806053