Physics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9113423m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Dec. 1, 1986, p. 13423-13431. NASA-supported research.
Physics
79
Computerized Simulation, Convection, Earth Magnetosphere, Ion Motion, Particle Acceleration, Ats 6, Equations Of Motion, Geosynchronous Orbits, Ion Distribution, Particle Trajectories
Scientific paper
To explore the properties of the 'convection surge' mechanism postulated by Quinn and Southwood (1982), a quantitative computer model of the mechanism is constructed. The model incorporates the dipolarization of the field line shapes as well as the results of recent transient electric field measurements by the AST-6 satellite. The computer model numerically integrates the equations of motion of ensembles of ions populating a single flux tube that goes through the convection surge or 'dipolarization' transformation. The numerical results confirm that the mechanism easily generates the bounce-phase-bunched ion distributions in question, and show that the convection surge can generate dramatically field-aligned ion distributions. It is hypothesized that the convection surge mechanism is fundamentally associated with the processes responsible for transporting tail ion populations to the geosynchronous regions of the earth's magnetosphere.
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