A corona-stabilised plasma closing switch

Beveridge, J.R. and MacGregor, S.J. and Timoshkin, I.V. and Lehr, J.M. (2009) A corona-stabilised plasma closing switch. In: Proceedings of the 2008 IEEE International Power Modulators and High Voltage Conference. IEEE, pp. 487-490. ISBN 978-1-4244-1534-2

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Abstract

Corona-stabilised plasma closing switches, filled with electronegative gases such as SF6 and air, have been used in pulsed-power applications as repetitive switching devices for the last 10 years. Their high repetition-rate capabilities coupled with their relatively simple design and construction have made them suitable alternatives to thyratrons and semi-conductor switches. As well as having repetitive switching capabilities, corona-stabilised plasma closing switches have the potential to work at elevated voltages through the incorporation of multiple electrode sets. This allows high-voltage operation with inherent voltage grading between the electrodes. A further feature of the switches is that they have relatively low jitter under triggered condition. This paper reports on some of the operational features of a new design of corona-stabilised, cascade switch that utilises air at atmospheric pressure as the insulating gas.