Numerical modeling of proton and electron bursts in a realistic magnetotail

Details Numerical modeling of proton and electron bursts in a realistic magnetotail Numerical modeling of proton and electron bursts in a realistic magnetotail

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.3234k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, April 1, 1987, p. 3234-3242. Research supported by the University of

Physics

1

Geomagnetic Tail, High Energy Electrons, Magnetospheric Electron Density, Magnetospheric Proton Density, Neutral Sheets, Particle Trajectories

Scientific paper

Particle trajectories of the magnetotail ion and electron bursts were simulated using the Beard-Hirschi-Propp (1982) magnetic field model and data generated by IMP 8. Particle trajectories were computed both in the absence of the electric field, and with electric field introduced locally perpendicular to the magnetic field. The results indicate that the motions of energetic particles near the nominal neutral sheet can be divided into two types. Proton and electron parallel trajectories have most of their trajectory motion parallel to the magnetic field lines and travel long distances along field lines. Perpendicular particle trajectories travel much shorter distances with much of the trajectory motion perpendicular to the magnetic field and with proton trajectories interacting with the neutral sheet region. Only the premidnight trajectories connect to reasonable source locations, which explains the preferential occurrence of earthward energetic proton burst anisotropies in the premidnight sector.

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