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The Study of Shock Launching in Silicon by Pulsed X-Ray Diffraction.
NAVAL RESEARCH LAB WASHINGTON DC
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Multikilobar shocks were launched into a single crystal of 111 silicon overcoated with 1000 A aluminum and a 25 micron transparent plastic layer by irradiation with a 1 nsec pulse of 1.06 microcron laser light at 0.8-8 J cmexp -2. Peak lattice compressions densities were directly measured and shocked lattice stresses inferred as a function of irradiance and time by Bragg diffracting a short 100 psec burst of probing x-rays through the shock launching region. Compressions of up to 4 were measured, corresponding to stresses of order 70 Kbar, at irradiances of 4 x 10exp 9 W cmexp -2.
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