A study of three‐dimensional observation of prebreakdown phenomena in dielectric liquids

Abstract

SUMMARYThis paper presents a new method which visualizes the high-speed three-dimensional images of prebreakdown streamers in dielectric liquids. A new optical system, having two crossed light axes to observe the needle tip from different directions, was designed. The shadowgraphic images from these two directions were combined through a beam splitter and focused on the photo-cathode of an image converter camera. The photograph taken by this high-speed shadowgraph system was reconstructed to three-dimensional images using an image scanner and a computer. Using this system, the growth and decay processes of the streamer in cyclohexane were investigated. © 1999 Scripta Technica, Electr Eng Jpn, 128(4): 915, 1999