Accurate Measurement of the Velocity History of a Laser-Driven Foil Plate with a Push-Pull-Type VISAR.
We describe a technique that provides high time resolution and high accuracy in the velocity-history measurement by coupling an electronic streak camera with a push-pull-type velocity interferometer system for any reflector. This technique shows strong potential for the study of the dynamic process associated with a rapid velocity change, such as the acceleration of a foil plate driven by a pulsed laser beam. Also, by using a micrometer-size spot optical probe, we demonstrate the acceleration histories of Al 10-mum-thick foil plates at laser intensities ranging from 30 to ~400 GW/cm(2) with a subnanosecond time resolution and within a 1-2% error for peak velocity.
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Kobayashi
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Sekine
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