Title :
Anomalies of electron emission and Schottky effect of metals exposed to fast heating by electric current
Author_Institution :
High Energy Density Res. Center, Acad. of Sci., Moscow, Russia
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;
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
DOI :
10.1109/DEIV.1996.545466
