High-Speed Multiple-Spark Light Source

Abstract

A high-speed spark light source is described which can be used in the photographic systems of shock tunnels, shock tubes, and ballistic ranges. The source provides five high-intensity flashes, each with available delays of as low as 0.1 μsec between consecutive sparks. The transmission line principle is used with barium titanate capacitors to obtain a spark discharge time of under 0.1 μsec. Five spark assemblies are mounted in line with a lens system to provide a common point where all spark flashes are brought to focus. The light source is used in conjunction with a high-speed drum camera on which is mounted the recording film.