X-ray enhancements detected during thunderstorm and lightning activities

Details X-ray enhancements detected during thunderstorm and lightning activities X-ray enhancements detected during thunderstorm and lightning activities

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8.1176p&link_type=abstract

Geophysical Research Letters, vol. 8, Nov. 1981, p. 1176-1179.

Physics

47

Atmospheric Radiation, Bremsstrahlung, Lightning, Thunderstorms, X Ray Density Measurement, Current Density, Electron Acceleration, Energetic Particles, Energy Distribution, Radiation Detectors

Scientific paper

The results obtained by an X-ray detector flown into thunderstorms on board a NASA F-106 jet are discussed. It is found that significant quantities of X rays ranging in energy from 3 to more than 12 keV are produced within thunderstorm clouds which support lightning discharge activity. It is inferred that the X rays are the bremsstrahlung radiation emitted from energetic electrons that have been accelerated through run-away processes. Evidence is presented to support the contention that the structures responsible for the acceleration are strong double layers supported by the very high current densities attributed to lightning discharges. The X-ray detector system consists of a 5.04 cm diameter NaI(Tl) crystal coupled to a photomultiplier tube.

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