Anomalies of electron emission and Schottky effect of metals exposed to fast heating by electric current

Author

Stepanova, N.V.

Author_Institution

High Energy Density Res. Center, Acad. of Sci., Moscow, Russia

Volume

2

fYear

1996

fDate

21-26 Jul 1996

Firstpage

770

Abstract

Basing on the experimental investigation of anomalies of electron emission of metals in solid state observed during heating by an electric current of high density (10⁶ A/cm²), the model of non-equilibrium electron surface states is proposed. Observed anomalies are explained by decreasing of electron work function which take place due to rapid heating of metal accompanied by evacuation of emitted electrons. The relation was found between the termination of anomalous electron emission and appearance of ordered metal structure, typical for strongly non-equilibrium opened systems. The mechanism is proposed for electron evacuation in the presence of magnetic field which explains electron “anomalous Schottky effect” observed for clean as well as for absorbate covered surface. Emission of positive ions under pulsed heating of metals is treated also from this point of view

Keywords

Schottky effect; surface states; thermionic electron emission; work function; Schottky effect; anomalous Schottky effect; anomalous electron emission; electric current; electron emission; electron evacuation; electron work function; fast heating; metals; non-equilibrium electron surface states; ordered metal structure; rapid heating; Anodes; Cathodes; Current; Electron emission; Resistance heating; Solid modeling; Solid state circuits; Surface cleaning; Surface treatment; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 1996. Proceedings. ISDEIV., XVIIth International Symposium on

Conference_Location

Berkeley, CA

Print_ISBN

0-7803-2906-6

Type

conf

DOI

10.1109/DEIV.1996.545466

Filename

545466