A lightning discharge producing a beam of relativistic electrons into space

Details A lightning discharge producing a beam of relativistic electrons into space A lightning discharge producing a beam of relativistic electrons into space

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3718806c&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 18, CiteID L18806

Physics

7

Atmospheric Processes: Atmospheric Electricity, Ionosphere: Particle Acceleration, Magnetospheric Physics: Energetic Particles: Trapped, Atmospheric Processes: Lightning, Radio Science: Ionospheric Propagation (0689, 2487, 3285, 4275, 4455)

Scientific paper

Strong electric fields associated with lightning generate brief (˜1 ms) but intense Terrestrial Gamma-ray Flashes (TGFs), detected by spacecrafts. A few events are thought to be the signature of a relativistic electron beam escaping the atmosphere, which is distinguishable from a TGF since the lightning discharge is along the geomagnetic field line from the spacecraft, rather than below. We refer to this event herein as a ‘Terrestrial Energetic-electron Flash’ (TEF), and present the first TEF with associated discharge. The TEF was detected by the Gamma-ray Burst Monitor aboard the Fermi satellite, and is correlated with a lightning discharge detected by three Stanford University AWESOME ELF/VLF receivers, a Duke University ULF receiver, and by the GLD360 lightning geolocation network. The discharge, nearly simultaneous with the generated electrons, was of intense peak current and of positive polarity, and with a modest total charge transfer, similar to TGF-associated discharges.

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