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Proceedings Paper

Pseudo-Three-Dimensional, Isodensity, And Density Profiles From Fiber Optic Output Of A MACH-130 Air Shock
Author(s): C. H. Dittmore; H. D. Glenn
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Paper Abstract

A modified Voitenko compressor generated a Mach-l30 air shock in an outlet pipe open to the atmosphere. Fiber optics transmitted luminosity associated with propagation of the air shock to an external display board, which was scanned with a high-speed streaking camera. We describe the computerized microdensitometer scanning technique for converting the film records to pseudo-3D, isodensity, and density profiles. The isodensity contours can be displayed using different colors to facilitate analysis. This technique can achieve resolutions of 1 ns and 2 pm. We give examples of the pseudo-3D, isodensity, and density profile plots for the experiment. The microdensitometer output was digitized for input to data display programs run on a CDC 7600. These results were used to provide submicrosecond accuracy for shock propagation over 5 m of the outlet pipes. In addition, we obtained information about gas flow behind the shock front. Other current or possible applications for the technique are measurement of: target implosion in laser fusion, flash x-ray data in hydrodynamic and ballistic experiments, temperature profiles for high energy (>105 K) gas dynamics, and dynamic events in weapons testing.

Paper Details

Date Published: 22 January 1982
PDF: 7 pages
Proc. SPIE 0296, Fiber Optics in Adverse Environments I, (22 January 1982); doi: 10.1117/12.932459
Show Author Affiliations
C. H. Dittmore, University of California (United States)
H. D. Glenn, University of California (United States)

Published in SPIE Proceedings Vol. 0296:
Fiber Optics in Adverse Environments I
Peter B. Lyons, Editor(s)

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