Application Of An Exploding Wire Capping Shutter To The Study Of Solid High Explosive Charges Using An Ultrahigh-Speed Rotating Mirror Camera

A. W. Gibb; R. Naylor; M. A. Nolan; J. B. Dempsey

doi:10.1117/12.967776

1 March 1983 Application Of An Exploding Wire Capping Shutter To The Study Of Solid High Explosive Charges Using An Ultrahigh-Speed Rotating Mirror Camera

A. W. Gibb, R. Naylor, M. A. Nolan, J. B. Dempsey

Author Affiliations +

Proceedings Volume 0348, 15th Intl Congress on High Speed Photography and Photonics; (1983) https://doi.org/10.1117/12.967776
Event: 15th International Congress on High Speed Photography and Photonics, 1982, San Diego, United States

Abstract

The Explosives and Engineering Group at Defence Research Establishment Suffield (DRES) has developed a portable field laboratory containing an ultra-high speed camera (Cordin Model 330A) for the study of detonation processes in solid high explosives. The camera is of the rotating-mirror type, the image being swept repeatedly over stationary film as the mirror rotates. The writing period is continuously adjustable from 40 microseconds to 400 microseconds, but the mechanical shutter closes on a time scale of milliseconds. In order to prevent optical over-write (multiple exposure) of the film due to the highly-luminous cloud of detonation products from the detonating explosive, an auxiliary, rapid-closing shutter must be utilized. This paper describes the successful design and use of an electronically-operated exploding-wire capping shutter which has an activation time predictable to within ±1 microsecond. The shutter principle is the same as that described by Edgerton and Strabalal. The unit developed at DRES has the ability to attenuate light by a factor of three hundred in fifteen microseconds, over a circular viewing area 10.2 cm (4 inches) in diameter.

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A. W. Gibb, R. Naylor, M. A. Nolan, and J. B. Dempsey "Application Of An Exploding Wire Capping Shutter To The Study Of Solid High Explosive Charges Using An Ultrahigh-Speed Rotating Mirror Camera", Proc. SPIE 0348, 15th Intl Congress on High Speed Photography and Photonics, (1 March 1983); https://doi.org/10.1117/12.967776

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