A new technique for a continuous monitoring of the displacement of a surface moving at velocities up to several millimeters per microsecond was developed. The method is based on microwave (24 GHz) interferometry. The technique enables precise measurements of the free surface velocity as well as covenient observation of small velocity step increases. The measured velocity is averaged over a surface area of the order of 10 cm2. Various effects which may influence the measurements are discussed. Preliminary measurements of free surface velocities of shocked metals are presented.
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Maron et al. (1980) studied this question.
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