double flash

Etymology

Definitions

1. 1

   The characteristic visual phenomenon produced by the atmospheric detonation of a nuclear…

   The characteristic visual phenomenon produced by the atmospheric detonation of a nuclear weapon, consisting of a very brief, bright flash of light which dims rapidly, followed by a second, gradually brightening flash.

   • On 22 September 1979 at about 1 a.m. GMT, a US Vela satellite passing over the South Atlantic detected a double flash of light in the vicinity of Prince Edward Island.
   • One of the sensors on satellites in the U.S. Nuclear Detonation System uses a relatively simple device to detect the “double flash” of a nuclear detonation anywhere on earth.
   • The detected signal was a “double flash” characteristic of nuclear test signals recorded on 41 previous occasions by Vela satellites.
2. 2

   A system using two flash separators to separate phases of a working fluid.

   • Dipippo, in 2008, reported that the double-flash plant increased power output by 15-25% compared to a single flash plant under the same geothermal fluid conditions [9, 10].

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