1 May 1994 Influence of dielectric surface properties on the generation of surface microplasmas
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Proceedings Volume 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum; (1994) https://doi.org/10.1117/12.174673
Event: XVI International Symposium on Discharges and Electrical Insulation in Vacuum, 1994, Moscow-St. Petersburg, Russian Federation
Abstract
Alumina samples with different surface polishing (unpolished, 9 micrometers diamond-finished, and 9 micrometers SiC-finished samples) were used in our studies in vacuum, under pulse excitation, to understand the influence of surface preparation on the surface predischarge associated with microplasmas. The unpolished sample exhibited very active predischarge events, consisting of active localized plasmas on the surface, with associated large predischarge current and high intensity of luminosity, and low electrical breakdown strength. Compared to the SiC-finished sample, the diamond-finished sample showed more active predischarge events and lower conditioned and hold-off voltages. There seems to be a correlation between the predischarge activity and the surface preparation. Our experimental studies indicate that the phenomena of predischarge localized plasmas are related to the physical state of the dielectric surface.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tangali S. Sudarshan, Tangali S. Sudarshan, C. R. Li, C. R. Li, "Influence of dielectric surface properties on the generation of surface microplasmas", Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174673; https://doi.org/10.1117/12.174673
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