DEMETER observations of transmitter-induced precipitation of inner radiation belt electrons

Details DEMETER observations of transmitter-induced precipitation of inner radiation belt electrons DEMETER observations of transmitter-induced precipitation of inner radiation belt electrons

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11407205g&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A7, CiteID A07205

Physics

Plasma Physics

4

Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Magnetosphere: Inner, Space Plasma Physics: Wave/Particle Interactions (2483, 6984), Ionosphere: Wave/Particle Interactions (7867), Magnetospheric Physics: Radiation Belts

Scientific paper

Near loss cone energetic electron flux increases induced by ground-based very low frequency (VLF) transmissions are observed directly via satellite-based detection. In 2 years of experiments ranging from 27 March 2006 through 2 April 2008 with the 21.4-kHz transmitter NPM in Lualualei, Hawaii, and the French satellite DEMETER (detection of electromagnetic emissions transmitted from earthquake regions), only a few cases of detection of individual pulses of transmitter-induced precipitation of inner radiation belt electrons have been realized. Analysis of the specific cases of detection allow comparison of precipitating flux with predictions based on ray-tracing analyses of wave propagation and test particle modeling of the wave-particle interaction. Results indicate that the precipitated flux of >100 keV electrons induced by the NPM transmitter peaks at L $\simeq$ 1.9 and, in the rare cases of detection, may be at higher energies than the ˜100 keV peak predicted by the model. The low detection rate is attributed to the orientation of the DEMETER particle detector, which is mostly overwhelmed by the trapped population at the location of detection.

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