Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87..681s&link_type=abstract
Journal of Geophysical Research, vol. 87, Feb. 1, 1982, p. 681-694.
Physics
14
Geomagnetism, Ion Distribution, Magnetospheric Ion Density, Plasma Diagnostics, Satellite Observation, Ats 6, Distribution Functions, Ion Temperature, Pitch (Inclination), Spectral Energy Distribution, Temporal Distribution
Scientific paper
Ion energy and pitch angle distribution functions are examined for a magnetically quiet day using averaged data from ATS 6. For both field-aligned and perpendicular fluxes, the populations have a mixture of characteristic energies, and the distribution functions can be fairly well approximated by Maxwellian distributions over three different energy bands in the range 3-600 eV. Pitch angle distributions varying with local time, and energy distributions are used to compute total ion density. Pitch angle scattering mechanisms responsible for the observed transformation of pitch angle distribution are examined, and it is found that a magnetic noise of a certain power spectral density belonging to the electromagnetic ion cyclotron mode near the ion cyclotron frequency can be effective in trapping the field aligned fluxes by pitch angle scattering.
Raitt William J.
Singh Navinder
Yasuhara Fumihiko
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