High-current cathode and anode spots in gas discharges at moderate and elevated pressures

Physical properties of the high-current density spots (which are not the hot arc spots) formed on the electrodes due to development of electro-dynamical and ionization instabilities in the near-electrode layers are the subjects of this paper. The influence of these spots on homogeneity of the plasma...

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Bibliographic Details
Published inPlasma sources science & technology Vol. 23; no. 5; pp. 54013 - 16
Main Authors Akishev, Yu, Karalnik, V, Kochetov, I, Napartovich, A, Trushkin, N
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2014
Subjects
Cathodes
constriction
Density
Discharge
Electrodes
Gas discharges
high-current electrode spots
Homogeneity
normal anode spot
Physical properties
pre-arc cathode spot
Spots
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Summary:Physical properties of the high-current density spots (which are not the hot arc spots) formed on the electrodes due to development of electro-dynamical and ionization instabilities in the near-electrode layers are the subjects of this paper. The influence of these spots on homogeneity of the plasma column between the electrodes due to initiation of the discharge constriction is discussed and illustrated by the proper experimental data. The geometrical and gas-dynamic effects stabilizing the formation of the anode and cathode current spots at higher gas pressures are described.
Bibliography:PSST-100107.R1
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0963-0252
1361-6595
DOI:10.1088/0963-0252/23/5/054013