Effects of collisions on the nonlinear particle dynamics in the magnetotail

Details Effects of collisions on the nonlinear particle dynamics in the magnetotail Effects of collisions on the nonlinear particle dynamics in the magnetotail

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1579h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Aug. 1991, p. 1579-1582. Research supported by U.S. Navy.

Physics

19

Charged Particles, Geomagnetic Tail, Particle Collisions, Atmospheric Scattering, Distribution Functions, Particle Trajectories, Wave-Particle Interactions

Scientific paper

The effects of collisional processes on the nonlinear particle dynamics in the magnetotail are considered.A simple collision operator is developed to model the effects of pitch-angle and energy scattering. It is found that the phase space partition persists for up to moderate scattering amplitudes in pitch-angle and energy, and that certain distribution function features are robust even in the presence of large amplitude collisions. It is shown that if the collisions are due to short scale length electrostatic fields, excessively large field amplitudes are required to signifiantly alter the phase space structures and the resulting distribution function features.

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