17 April 2001 Optical probing of rapid velocity change of miniature object
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Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424314
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan
Abstract
Ablative acceleration properties of laser-driven foil plates (Al, 10 and 18 micrometer-thick and 1 to approximately 2 mm in diameter) have been studied experimentally at laser irradiance from 30 to 400 GW/cm2. Push-pull type VISAR (Velocity Interferometer System for Any Reflector) was utilized for the measurement, but an optical recording system was developed to provide sub-nanosecond time resolution. For the 18 micrometer- thick Al foil irradiated at 360 GW/cm2, ablative accelerations up to terminal velocity of about 10 km/s within 30 ns has been determined with a velocity uncertainty of approximately 2%. The acceleration rate detected in the experiments is (0.2 to approximately 0.6)X 1012 m/s2, which is about 1011 times of the acceleration by the gravity.
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Hongliang He, Hongliang He, Tsunehiro Kobayashi, Tsunehiro Kobayashi, T. Sekine, T. Sekine, "Optical probing of rapid velocity change of miniature object", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424314; https://doi.org/10.1117/12.424314
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