HE burn movie

A seven-frame proton-radiography movie of a high-explosive burn. The "static" frame, taken before the detonation, shows a large-diameter cylinder of high explosive (HE) on top of a narrower HE cylinder. Movie frames show how the densities of the two cylinders change as the detonation wave moves upward from the bottom of the smaller cylinder. A swept-back shadow is produced by the detonation's reaction products. The ignition of the upper cylinder is of particular interest. Dark regions near the interface between the two cylinders—but slightly beyond the edge of the smaller cylinder—are where the explosive burns inefficiently as it "turns the corner" from the narrower to the wider HE cylinder. Such inefficiencies are of interest in explosives research.

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