期刊
JOURNAL OF APPLIED PHYSICS
卷 109, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3506696
关键词
-
资金
- U.S. Department of Energy through the LANL/LDRD
We present the free surface response of 2, 5, and 8 mu m aluminum films to shocks generated from chirped ultrafast lasers. We find two distinct steps to the measured free surface velocity that indicate a separation of the faster elastic wave from the slower plastic wave. We resolve the separation of the two waves to times as short as 20 ps. We measured peak elastic free surface velocities as high as 1.4 km/s corresponding to elastic stresses of 12 GPa. The elastic waves rapidly decay with increasing sample thickness. The magnitude of both the elastic wave and the plastic wave and the temporal separation between them was strongly dependent on the incident laser drive energy. c 2011 American Institute of Physics. [doi:10.1063/1.3506696]
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