Direct detection of the precipitation of ring current electrons and protons stimulated by artificial VLF emission

Details Direct detection of the precipitation of ring current electrons and protons stimulated by artificial VLF emission Direct detection of the precipitation of ring current electrons and protons stimulated by artificial VLF emission

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..705k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Aug. 1984, p. 705-708. Research supported by the Centre National d'Etude

Physics

3

Electron Precipitation, High Energy Electrons, Proton Energy, Ring Currents, Very Low Frequencies, Cyclotron Resonance, Electron Energy, Vlf Emission Recorders

Scientific paper

It is pointed out that resonant wave-particle interactions play an important role in the modification of the pitch angle distribution of the suprathermal magnetospheric plasma, inducing energetic particle precipitation in the atmospheric loss cone. For several years, attempts have been made to measure directly the flux of precipitated particles stimulated by ground-based VLF emitters. The present investigation is concerned with results obtained in the Soviet Sub-Auroral Emitter (ESSA) experiment. ESSA is part of the Franco-Soviet ARCAD-3 project, which involves the use of the AUREOL-3 polar-orbiting satellite. A report is presented of the first direct detection of energetic proton and electron precipitation from the ring current in December 1981. A Soviet VLF transmitter was utilized in the experiments. The transmitter operated at a frequency of 19.1 kHz. During AUREOL-3 passes, modulated VLF waves were measured on the ground and with satellite-borne instruments.

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