Pulsed submicrosecond multichannel sliding discharges of opposite polarities: Filling of the discharge gap with spark channels

Results are presented from measurements of the discharge current and the factor of the discharge gap filling with spark channels during pulsed sliding discharges of opposite polarities in Ne, Ar, and Xe on an aluminum oxide ceramic surface. The measurements were performed in the regime of single pul...

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Bibliographic Details
Published in:Plasma physics reports 2012-05, Vol.38 (5), p.382-391
Main Author: Trusov, K. K.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM OXIDES
ARGON
Atomic
CERAMICS
COMPARATIVE EVALUATIONS
Diagnostics of Pulsed Systems
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRIC SPARKS
ELECTRODES
Molecular
NEON
Optical and Plasma Physics
Physics
Physics and Astronomy
PLASMA DENSITY
PLASMA PRESSURE
PLASMA PRODUCTION
PULSES
XENON
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Summary:Results are presented from measurements of the discharge current and the factor of the discharge gap filling with spark channels during pulsed sliding discharges of opposite polarities in Ne, Ar, and Xe on an aluminum oxide ceramic surface. The measurements were performed in the regime of single pulses of submi-crosecond duration at discharge voltages of 0–12 kV with two discharge chambers with different thicknesses of the ceramic plate (0.4 and 0.17 cm) and different electrode gap lengths (4 and 10.3 cm) at gas pressures of 30 and 100 kPa. The results obtained for discharges of opposite polarities are compared with one another, and common features of discharges in three gases are revealed. It is shown that the filling of the discharge gap with spark channels in the gases under study is more efficient in the case of the positive polarity of the discharge voltage, except Xe at a pressure of 100 kPa in the electrode gap of length 10.3 cm. The quasi-homogeneous regime of discharge in each of the three gases is attained easier at lower gas pressures. Comparison of the data on the filling factors of the discharge gap and the peak currents of opposite-polarity discharges for each gas at a given pressure indicates that the higher the discharge current, the more densely the discharge gap is filled with spark channels.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X12040095