Investigations of the Current Density in the Cathode Spot of a Vacuum Arc
- 1 January 1985
- journal article
- research article
- Published by Wiley in Contributions to Plasma Physics
- Vol. 25 (5) , 467-473
- https://doi.org/10.1002/ctpp.19850250507
Abstract
A short review is given on the problem of the current density in the cathode spot of a vacuum arc, theoretical models and experimental results are discussed. A new measuring method is presented which is directly related to the current carrying area of the spot. It leads to current densities of 1012 A/m2 at clean surfaces (comparable with results obtained from crater measurements) and 109−1010 A/m2 with contaminated surfaces.Keywords
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