Vacuum cathode arc root for a current of 10A on a silver contact

The cathode spot is theoretically analyzed here for a 10A current and a silver contact in vacuum. The main equations leading to the values of physical characteristics are detailed and resolved according to the radius r in the domain 0.5-1.5μm. The choice of this field is imposed by the limits of the...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 29; no. 1; pp. 12007 - 11
Main Authors Lefort, A, Abbaoui, M
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2012
Subjects
Cathodes
Contact
Mathematical analysis
Metal vapors
Metal vapour
Physical properties
Silver
Spots
Vapor pressure
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Summary:The cathode spot is theoretically analyzed here for a 10A current and a silver contact in vacuum. The main equations leading to the values of physical characteristics are detailed and resolved according to the radius r in the domain 0.5-1.5μm. The choice of this field is imposed by the limits of the current density and time of appearance of the metal vapour. The findings show that when they are created the spots have cathode radius that fall to low values of field. Under the action of saturated vapour pressures higher radius of the spot will grow but its growth is limited by its lifetime.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/29/1/012007