NDLI: Model analysis of breakdown in high-voltage, water-based switches

Content Provider	IEEE Xplore Digital Library
Author	Joshi, R.P. Qian, J. Kolb, J. Schoenbach, K.H.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., Old Dominion Univ., Norfolk, VA, USA (Joshi, R.P.; Qian, J.; Kolb, J.; Schoenbach, K.H.)
Abstract	A time-dependent model containing several new features has been developed for treating the breakdown of water under nanosecond pulsed conditions. It is argued that the traditional mechanisms such as bubble formation and thermal heating no longer apply. Instead, the mechanism of breakdown will be dictated by the surface electric field behavior and subsequent injection of electrons at the interface. Thus, the interface layer and electrode conditions will begin to be far more important than the bulk liquid properties in determining breakdown and hold-off voltage levels. It is shown that very strong electric field enhancements can occur due to the collective orientation of dipoles near the interface. Under high voltage conditions, the injected electrons are assumed to have relatively long lifetimes due to a continuous replenishment of energy from the external field. The simulations show a breakdown within about 200 ns for an applied pulse of 20 kV for a 200 /spl mu/m water-filled switch. The predictions are in keeping with recent experimental observations by our group.
Sponsorship	Pulsed Power Sci. and Technol. Committee of the IEEE Nuclear and Plasma Sci. Soc
Starting Page	293
Ending Page	296
File Size	319786
Page Count	4
File Format	PDF
ISBN	0780379152
DOI	10.1109/PPC.2003.1277713
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric breakdown Switches Heating Breakdown voltage Dielectric liquids Electrons Acoustic pulses Pulse power systems Energy storage Pulse generation
Content Type	Text
Resource Type	Article

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