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Laser-driven shock wave stability in Al through Au and determination of the TPa hugoniot point in Au

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10 Author(s)
Shu, Hua ; Shanghai Institute of Laser Plasma, P.O. Box 800-229, Shanghai 201800, China ; Fu, Si-zu ; Huang, Xiu-guang ; Ma, Min-xun
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High-quality shock waves were produced using the ninth laser beam (converted to ) of Shenguang-II laser facility and the beam smoothing technology of a lens array. The spatial uniformity of the shock wave was estimated by measurements of the self-emission from the target rear surface. An Al–Au four-step target with 30 μm Al base and four Au steps was fabricated and used to investigate the temporal steadiness of the shock wave in the Al–Au two-layer target. The Al–Au four-step target experiment indicated that the shock wave steadily propagated in the Au material with thickness range ≪11 μm. A modified Al–Au impedance-match target was designed, which could simultaneously measure shock-wave stability and Au Hugoniot data in one shot. The experiment results indicated that the shock wave steadily propagated in the Al target with thickness of about 30–47 μm under a power density of ∼1.0×1014 W/cm2.

Published in:

Journal of Applied Physics  (Volume:103 ,  Issue: 9 )

Date of Publication:

May 2008

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