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Los Alamos National Laboratory Research Quarterly, Winter 2003
Proton Radiography
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Movie sequence

Proton radiography is a new diagnostic technique that produces detailed movies of high-speed shock and implosion tests. This sixteen-frame proton-radiography movie shows how a tin disk responds to the shock wave produced by detonating a high explosive beneath the disk. First, the detonation's spherical shock wave bulges the disk (about 2 inches in diameter and 0.25 inch thick). Then, when the compressive shock wave reflects from the disk's upper surface, the shock becomes tensile, dislodging and levitating the spall layer (the "flying saucer"). The shock wave's high pressure and temperature also melt the tin (light gray region connecting the flying saucer and bulge).

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