17 April 2001 Laser-produced plasma in high-speed flows
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Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424360
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan
Abstract
For the purpose of constructing the design rules of air- breathing laser launcher, the expansion of plasma, which was produced from air by focusing pulse laser, was investigated. A 10-J-pulse TEA CO2 laser was used for these experiments. First, plasma was formed in a quiescent atmospheric air. Photographs and shadowgraphs were taken using an ICCD camera with high-speed gating. From the photographs, the propagation velocity along the laser axis was measured. The velocity was found around 104 m/s much higher than that of a detonation wave calculated using LSD model. Since laser intensity at the plasma front was below the threshold for LSD regime, absorption/expansion mechanism other than LSD might predominate under the experimental condition. Shadowgraphs were taken to measure the expansion velocity of plasma and that of shock wave around plasma. The flow facility, in which plasma is formed in Mach 2 stream, was presented.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Koichi Mori, Kimiya Komurasaki, Yasuhiko Arakawa, "Laser-produced plasma in high-speed flows", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424360; https://doi.org/10.1117/12.424360
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