Self-consistent kinetic numerical simulation model for ring current particles in the Earth's inner magnetosphere

Details Self-consistent kinetic numerical simulation model for ring current particles in the Earth's inner magnetosphere Self-consistent kinetic numerical simulation model for ring current particles in the Earth's inner magnetosphere

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11602216a&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A2, CiteID A02216

Physics

1

Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Ring Current, Magnetospheric Physics: Numerical Modeling

Scientific paper

A new self-consistent and kinetic model for ring current particles in the inner magnetosphere is presented. A closed set of nonlinear time evolution equations is derived that incorporates kinetic particle dynamics and self-consistent development of the electromagnetic field. The particle transport is described by a five-dimensional collisionless drift kinetic equation, in which particle trajectories are approximated by their guiding centers under the influence of a time-dependent electromagnetic field. The time evolution of the electromagnetic field follows the Maxwell equations with the feedback from particles through electric currents. A numerical simulation code solving the system of equations in a global inner magnetosphere in three spatial dimensions (or five dimensions in phase space) is developed. It is demonstrated that the propagation of magnetohydrodynamic waves can successfully be described by the present model. It is also found that the self-consistent coupling could affect the transport of energetic particles especially at low energies as well as the intensity and spatial distribution of field-aligned currents. These preliminary results suggest the importance of the self-consistent coupling in the global development of geomagnetic storms.

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