Low-inductance switching using parallel spark-gaps

It is suggested that the requirement of a capacitor discharge bank for a fast low-impedance switch can be met by using many spark gaps in parallel. Three types of triggered spark-gap are described and their operation in a parallel system is analysed. Some results of experiments on these gaps are given. Finally, a report is given of the construction and performance of the 45kJ 200-spark-gap bank currently in use at the Atomic Weapons Research Establishment. It is concluded that the system is capable of extension to much larger banks.