Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.u21b..01b&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #U21B-01
Physics
2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2774 Radiation Belts, 7847 Radiation Processes, 7984 Space Radiation Environment
Scientific paper
Data from Explorer I (launched 31 January 1958) and Explorer 3 (launched 26 March 1958) provided the first space-age scientific discovery: The existence of a doughnut-shaped region of charged particle radiation trapped by Earth's magnetic field. We now see that radiation belt processes are universal phenomena. Results from recent space missions have shown clear evidence that radiation belts exist at all strongly magnetized planets throughout the solar system. Highly dynamical behavior of radiation belts still remains a mystery even 50 years after the original discoveries by J.A. Van Allen and coworkers. During increased solar and geomagnetic activity, radiation levels across the belts vary over orders of magnitude on the timescales of minutes to days. A large range of acceleration and loss mechanisms operating at different spatial and temporal scales compete over the global extent of the belts. While a number of local and global mechanisms have been identified as potentially important, their relative role is not understood. This presentation will provide a perspective on radiation belt processes as addressed in this special session.
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