Physics – Space Physics
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982rvgsp..20..613s&link_type=abstract
(International Council of Scientific Unions, International Magnetospheric Study Assessment Symposium, Greenbelt, MD, May 21-23,
Physics
Space Physics
3
Data Acquisition, International Magnetospheric Study, Particle Motion, Radiation Belts, Anisotropic Media, Plasma Layers, Positive Ions, Protons, Ring Currents
Scientific paper
The status of radiation belt science at the close of the International Magnetospheric Study's data acquisition phase is assessed. Synopses are given of results concerning source, energization, transport and loss processes for geomagnetically trapped radiation, as well as the consequences of adiabatic charged particle motion. Attention is given to (1) the effects of charge exchange and radial transport on the ion composition of the ring current and radiation belts, (2) the measurement of ion distributions in all three dimensions of velocity space, and (3) the evolution of radiation belt particle intensities as a consequence of temporal variations of the transport coefficients and boundary conditions, both over the solar cycle and over the course of a magnetic storm. Remaining problems include particle energization in the plasma sheet, in solar flares, and in Jupiter's magnetosphere. The two latter cases are possible sources for the earth's radiation belts.
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