Optical probing of rapid velocity change of miniature object

Hongliang He; Tsunehiro Kobayashi; T. Sekine

doi:10.1117/12.424314

17 April 2001 Optical probing of rapid velocity change of miniature object

Hongliang He, Tsunehiro Kobayashi, T. Sekine

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.

Citation Download Citation

Hongliang He, Tsunehiro Kobayashi, and 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); https://doi.org/10.1117/12.424314

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