Characterisation of three-electrode spark gap used in Mogul-D

Wilson, M.P. and MacGregor, S.J. and Timoshkin, I. and Thomas, K.J. and Sinclair, M.A.; (2007) Characterisation of three-electrode spark gap used in Mogul-D. In: ICOPS 2007. IEEE, USA, p. 359. ISBN 9781424409150

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This study focuses on the characterization of a spark gap closing switch used by AWE in their Mogul-D and other pulsed power facilities at Aldermaston. The switch is a dc-charged, three-electrode spark gap. The effect of the polarity and magnitude of the charging voltage is investigated. Aspects of switching performance have also been investigated using a 10-stage Marx generator, capable of producing output pulses in the region of 750 kV. A D-dot field probe, flush-mounted in the earth electrode of the switch, is used as a diagnostic to monitor the switching characteristics.