Transport, charge exchange and loss of energetic heavy ions in the earth's radiation belts - Applicability and limitations of theory

Details Transport, charge exchange and loss of energetic heavy ions in the earth's radiation belts - Applicability and limitations of theory Transport, charge exchange and loss of energetic heavy ions in the earth's radiation belts - Applicability and limitations of theory

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29.1215s&link_type=abstract

(Max-Planck-Institut für Aeronomie, Symposium on Ionic Composition, Lindau ueber Northeim, West Germany, Aug. 25-29, 1980.) Plan

Computer Science

14

Energetic Particles, Heavy Ions, Ionic Mobility, Radiation Belts, Terrestrial Radiation, Charge Exchange, Chemical Composition, Computerized Simulation, Coulomb Collisions, Diffusion Theory, Explorer 45 Satellite, International Sun Earth Explorer 1, Particle Flux Density, Transport Theory

Scientific paper

Computer simulations of processes which control the relative abundances of ions in the trapping regions of geospace are compared with observations from discriminating ion detectors. Energy losses due to Coulomb collisions between ions and exospheric neutrals are considered, along with charge exchange losses and internal charge exchanges. The time evolution of energetic ion fluxes of equatorially mirroring ions under radial diffusion is modelled to include geomagnetic and geoelectric fluctutations. Limits to the validity of diffusion transport theory are discussed, and the simulation is noted to contain provisions for six ionic charge states and the source effect on the radiation belt oxygen ion distributions. Comparisons are made with ion flux data gathered on Explorer 45 and ISEE-1 spacecraft and results indicate that internal charge exchanges cause the radiation belt ion charge state to be independent of source charge rate characteristics, and relative charge state distribution is independent of the radially diffusive transport rate below the charge state redistribution zone.

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