Physics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.4517l&link_type=abstract
Journal of Geophysical Research, vol. 81, Sept. 1, 1976, p. 4517-4523.
Physics
1
Adiabatic Equations, Electron Flux Density, High Energy Electrons, Magnetic Effects, Magnetically Trapped Particles, Periodic Variations, Adiabatic Conditions, Geomagnetism, Magnetic Flux, Magnetic Storms
Scientific paper
It was previously shown that trapped electron fluxes of energies in the range from 50 keV to 1 MeV observed in the afternoon magnetosphere during substorms frequently undergo periodic variations. High-resolution electron spectrometer data indicate that these electron variations are periodic in the range of about 2-12 min, correlated with magnetic field variations, organized by the local magnetic field, and dependent on pitch angle. The observations suggest that the electron variations are adiabatic. The study derives quantitative adiabatic expressions of particle flux variations in a model geomagnetic field perturbation to show that the observational features are consistent with effects arising from adiabatic modulation of trapped particle fluxes.
Lin Chang-Shou
Parks George K.
Winckler John R.
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