Patent ID: 8350472
Filing Date: 2013-01-08
Classification: H01J

Abstract:
1. A spark gap switch comprising a pair of main electrodes, a plurality of trigger electrodes, a photocathode and a high vacuum cell, all located inside a sealed housing; wherein the spark gap switch is doubly or multiply triggered by a first ionization of a dielectric medium between the main electrodes upon a passing of an energetic beam through the dielectric medium in a main spark gap, and by a second and subsequent ionization of the dielectric medium by using a leftover energy of the energetic beam incident on the photocathode, thereby enhancing and completing a voltage breakdown of the dielectric medium between the main electrodes so that a minimum trigger gap voltage rising speed is 234 kV/ns and said switch can be closed with a low delay time, low jitter and high efficiency of optical trigger energy.