DocumentCode :
1217959
Title :
Characterization of the Cathode Spot
Author :
Jüttner, Burkhard
Volume :
15
Issue :
5
fYear :
1987
Firstpage :
474
Lastpage :
480
Abstract :
A general description of arc cathode spots is given with respect to structure, size, and temporal behavior. The density of the metal vapor plasma outside the spot is presented as a function of the coordinates, calculated on the basis of ion currents flowing to screens and probes. Extrapolation to the region within the spot indicates plasma densities in excess of 1025 m-3. Recent studies of spot current density suggest values of about 1012 A/m2. In this connection, the problem of the electrical conductivity of the spot plasma is discussed. Finally, experiments on spot lifetime and models of crater formation are reviewed.
Keywords :
Cathodes; Clouds; Current density; Plasma density; Plasma devices; Plasma displays; Plasma measurements; Plasma temperature; Size measurement; Spatial resolution;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.1987.4316740
Filename :
4316740
Link To Document :
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