Single-particle dynamics of the parabolic field model

Details Single-particle dynamics of the parabolic field model Single-particle dynamics of the parabolic field model

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.5949w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A4, p. 5949-5964

Physics

Geophysics

13

Earth Magnetosphere, Geomagnetic Tail, Magnetic Field Configurations, Particle Motion, Plasma Diffusion, Electric Fields, Geophysics, Mathematical Models, Plasma Dynamics, Poincare Problem, Space Plasmas

Scientific paper

In this paper we analyze the dynamics of single particle motion in the parabolic field model of the geomagnetotail using both numerical and analytical methods. We focus on the topology of the Poincare surface of section and its evolution, when the field lines are strongly curved (kappa less than 0.53). The stochastic region is classified into RB subcells and fingers. Diffusion of intersections in RB subcells and fingers is different because the subcells and fingers correspond to destructed islands and destructed separatrices, respectively. Phenomena like differential memory and enhanced trapping and escaping are results of these structures and the time it takes to return to the reversal region. Observations in some of the previous literature are discussed.

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