Theory for the Cathode Mechanism in Metal Vapor Arcs
作者:
T. H. Lee,
Allan Greenwood,
期刊:
Journal of Applied Physics
(AIP Available online 1961)
卷期:
Volume 32,
issue 5
页码: 916-923
ISSN:0021-8979
年代: 1961
DOI:10.1063/1.1736133
出版商: AIP
数据来源: AIP
摘要:
It is shown that in the cathode drop region of a metal vapor arc, there are four equations and two limiting conditions relating five dependent variables. The five dependent variables treated are temperature of the cathode spot, electric field at the cathode, total current density, current density carried by electrons, and the radius of the spot. When these equations are combined, a current level is found below which no solution exists. It is proposed that this current corresponds to the point at which a vacuum arc extinguishes in an alternating‐current circit. Experimental measurements of the current level at which this event occurs have been made, and the results are compared with the theoretical calculations.
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