A spark gap switching system for gasdynamic facilities

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Abstract
A spark gap switching system has been developed to coordinate the discharge of a 300 kJ capacitor bank with the high speed flow of helium in a shock tube driver. The trigger system includes a flow transducer, a pulse forming circuit, a high voltage sparkgenerator, and four heavy duty spark gaps that can carry total peak currents greater than 1.5×106 A. A glow gauge flow transducer sensitive to small gas density changes was used whose input power and signal output can withstand high voltage fluctuations. This switching system is of use with gasdynamicdischarge devices requiring a minimum number of switches.

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