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Proceedings Paper

Fabry-Perot Velocimetry Techniques: Is Doppler Shift Affected By Surface Normal Direction?
Author(s): David R. Goosman; Alan M. Frank,; Henry H. Chau; Norval L. Parker
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Paper Abstract

The Fabry-Perot laser velocimeter is used at LLNL for hydrodynamic, equation-of-state, surface-ejecta mass measurements and for other applications. Velocities of shocked surfaces can be measured to better than 1%, and multiple records can be superimposed on a single piece of film. Many phenomena are being investigated for possible sources of error. One concern was whether the direction of the surface normal could affect the measured Doppler shift, or whether the direction of the particle velocity was sufficient to determine the shift. A series of experiments with angles between the laser and particle velocity as small as 20° have shown that for the surface smoothnesses that we encounter, we see no effect caused by varying the direction of the surface normal.

Paper Details

Date Published: 9 January 1984
PDF: 9 pages
Proc. SPIE 0427, High Speed Photography, Videography, and Photonics I, (9 January 1984); doi: 10.1117/12.936272
Show Author Affiliations
David R. Goosman, Lawrence Livermore National Laboratory (United States)
Alan M. Frank,, Lawrence Livermore National Laboratory (United States)
Henry H. Chau, Lawrence Livermore National Laboratory (United States)
Norval L. Parker, Lawrence Livermore National Laboratory (United States)


Published in SPIE Proceedings Vol. 0427:
High Speed Photography, Videography, and Photonics I
Dennis L. Paisley, Editor(s)

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