High-speed plasma imaging: a lightning bolt

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作者：

Los Alamos Natl Lab, Los Alamos, United States ^{[1
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来源：

IEEE Trans Plasma Sci | / 1卷 / 83-84期

关键词：

Digital instruments - High speed cameras - Image intensifiers (electron tube) - Imaging techniques - Lightning - Thunderstorms;

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摘要：

Using a gated intensified digital Kodak Ektapro camera system, we captured a lightning bolt at 1000 frames per second, with 100-μs exposure time on each consecutive frame. As a thunder storm approached while darkness descended (7:50 pm) on July 21, 1994, we photographed lightning bolts with an f22 105-mm lens and 100% gain on the intensified camera. This 15-frame sequence shows a cloud to ground stroke at a distance of about 1.5 km, which has a series of stepped leaders propagating downwards, followed by the upward-propagating main return stroke.

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