Application Of Fabry-Perot Velocimeter To High-Speed Experiments

H. H. Chau; C. F. McMillan; J. E. Osher

doi:10.1117/12.969160

7 June 1989 Application Of Fabry-Perot Velocimeter To High-Speed Experiments

H. H. Chau, C. F. McMillan, J. E. Osher

Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989) https://doi.org/10.1117/12.969160
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China

Abstract

The Fabry-Perot (F-P) velocimeter is a useful instrument for measuring the velocity of objects at speeds ranging from fractions of a kilometer per second to a few tens of kilometers per second and up. Because of its immunity to electromagnetic interference and its velocity resolution, it has become the prime diagnostic tool in our electric-gun facility. Examples of its application to high-speed experiments include the following areas: Electric-gun flyer studies; Spallation of materials under high-speed impact; Momentum-transfer studies; Pressure pulse created by high-velocity impact; Detonation-wave studies in high-explosive experiments. The F-P velocimeter at Lawrence Livermore National Laboratory (LLNL) includes a long-pulse laser amplifier, two-channel recording capability, air or fiber-optic transport of laser light, light enhancement through the F-P proper, and an electronic streaking camera with a microchannel-plate intensifier. Data reduction includes a digitizing system that employs a video camera and a personal computer for manipulating fringe curves and calculating velocities. Software corrects distortions from the streak camera used to generate the record. Our system yields a velocity measurement with an accuracy of 1 to 2%.

Citation Download Citation

H. H. Chau, C. F. McMillan, and J. E. Osher "Application Of Fabry-Perot Velocimeter To High-Speed Experiments", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); https://doi.org/10.1117/12.969160

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