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Immersed-Foil Method for Measuring Shock Wave Profiles in Solids

Ahrens, Thomas J. and Ruderman, M. H. (1966) Immersed-Foil Method for Measuring Shock Wave Profiles in Solids. Journal of Applied Physics, 37 (13). pp. 4758-4765. ISSN 0021-8979. doi:10.1063/1.1708133.

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A new technique is described for measuring, essentially directly, a complex shock front profile that is transmitted into a transparent liquid from a solid material. The image of a grid light source, reflected from a Mylar foil immersed within the liquid, is recorded with a streak camera.Index of refraction data for liquids in the high‐pressure shocked state (required for calculating particle velocities from image displacements) are reported for glycerol, ethanol, water, and hexane to 220, 135, 58, and 41 kbar, respectively. The increase of index of refraction with density for water agrees with that reported by Zel'dovich, Sinitsyn, and Kormer, but is considerably less (as are also the results for the other liquids) than that predicted by the Lorentz‐Lorenz formula. Hugoniot data obtained concurrently with the refractive index data agree closely with those of Rice and Walsh. Applications of the immersed‐foil method are discussed for: (a) determining the release adiabats from shock states produced by a double shock front in a solid; (b) the study of shock wave attenuation in solids; and (3) measurement of the adiabatic sound velocity of liquids in the high‐pressure shocked state.

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Additional Information:© 1967 The American Institute of Physics. (Received 4 May 1966) This research was supported in part through the Defense Atomic Support Agency, Contract DA-49-146-XZ-277, as a portion of the Advanced Research Projects Agency's VELA-UNIFORM program. We appreciate the assistance of our colleagues, A. B. Christensen, B. Y. Loo, and J. T. Rosenberg in deriving formulas and carrying out experimental analyses, and that of W. Isbell in the careful execution of several experiments. We thank J. O. Erkman for providing us with Fig. 10. Discussions with W. Isbell and J. K. Crosby concerning the optical systems were also extremely helpful. We also wish to thank Dr. G. R. Fowles for his numerous suggestions and guidance and Dr. D. G. Doran for reviewing the manuscript.
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Defense Atomic Support Agency (DASA)DA-49-146-XZ-277
Advanced Research Projects Agency (ARPA), project VelaUNSPECIFIED
Issue or Number:13
Record Number:CaltechAUTHORS:20150811-134908613
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Official Citation:Immersed‐Foil Method for Measuring Shock Wave Profiles in Solids Ahrens, Thomas J. and Ruderman, M. H., Journal of Applied Physics, 37, 4758-4765 (1966), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59427
Deposited By: George Porter
Deposited On:11 Aug 2015 20:54
Last Modified:10 Nov 2021 22:20

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