A numerical study of suprathermal ionospheric ion trajectories in three-dimensional electric and magnetic field models

Details A numerical study of suprathermal ionospheric ion trajectories in three-dimensional electric and magnetic field models A numerical study of suprathermal ionospheric ion trajectories in three-dimensional electric and magnetic field models

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.5873s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, June 1, 1987, p. 5873-5884.

Physics

12

Ion Motion, Ionospheric Ion Density, Magnetospheric Ion Density, Particle Trajectories, Lines Of Force, Magnetic Field Configurations, Magnetically Trapped Particles, Magnetopause, Oxygen Ions, Vertical Motion

Scientific paper

A numerical study of the magnetospheric trajectories of ions upflowing from the ionosphere has been performed using three-dimensional magnetic and electric field models. Ion trajectories have been divided into three main types corresponding to (1) gravitational ions trapped between the magnetic and gravitational mirror points and drifting nearly along the local electric equipotential, (2) ions just escaping from the gravitational field and then convected to the magnetopause due to the loss of the main part of their kinetic energy, and (3) trapped and pseudo-trapped ions whose trajectories are mainly determined by the magnetic field topology (beams and conics) because of their large kinetic energy. Particles from conic distributions injected at inadequate local times and/or altitudes to gain enough energy to precipitate reach the dayside magnetopause after several bounce periods.

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