Quasi-relativistic electron precipitation due to interactions with coherent VLF waves in the magnetosphere

Details Quasi-relativistic electron precipitation due to interactions with coherent VLF waves in the magnetosphere Quasi-relativistic electron precipitation due to interactions with coherent VLF waves in the magnetosphere

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88..318c&link_type=abstract

Journal of Geophysical Research, vol. 88, Jan. 1, 1983, p. 318-328.

Physics

41

Cyclotron Resonance, Electron Precipitation, Magnetospheric Electron Density, Relativistic Effects, Vlf Emission Recorders, Whistlers, Energetic Particles, Energy Spectra, Particle Interactions, Particle Precipitation, Wave Interaction

Scientific paper

The equations of motion for the cyclotron resonance interaction between coherent whistler mode waves and energetic particles are rederived with the inclusion of relativistic effects. The pitch angle scattering of the near-loss-cone quasi-relativistic electrons trapped in the magnetosphere is studied using a test particle method employing these relativistic equations, and the precipitated energy spectrum due to the wave-induced perturbations of a full distribution of particles is computed. Results show that the full width at half maximum peak width of the rms scattering pattern of the near-loss-cone particles would give an upper bound to the peak width of the associated precipitated energy spectrum under the conditions of moderate wave intensities in the low L shell region. In addition, it is found that the peak widths are within the upper limit values measured by recent satellite experiments. It is concluded that interactions of inner radiation belt particles with monochromatic waves could produce precipitated fluxes with relatively sharp spectral widths, and that therefore the L-dependent narrow peaks observed by low altitude satellite particle detectors could be caused by such interactions.

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