Signatures of Charges Particle Dynamics in the Bifurcated Current Sheet

Details Signatures of Charges Particle Dynamics in the Bifurcated Current Sheet Signatures of Charges Particle Dynamics in the Bifurcated Current Sheet

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm41b..04z&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM41B-04

Physics

7807 Charged Particle Motion And Acceleration, 7839 Nonlinear Phenomena (4400, 6944), 2744 Magnetotail, 2764 Plasma Sheet

Scientific paper

Recent Cluster measurements of have demonstrated the possibility of the formation of a bifurcated current sheet structure i.e., a magnetic field reversal that has two separate current sheets with an extended region of weak, nearly uniform magnetic field between them. This type of structure has also been inferred from Geotail data. In this paper we examine the effects that the bifurcated sheet has on the resonant scattering of particles and on the underlying partitioning of phase space. We find that the phase space retains the basic partitioning that results in the distribution function features. We also find, however, that the forth root of the energy separation between the peaks can become modified. This is because the low energy particles primarily interact with field in the weak field region whereas the higher energy particles can interact with both the weak and strong field regions. The net result is a distribution function signature having one scaling for low energy particles and a different scaling for high energy particles. Such distributions are often found in the data and may be indicative of a bifurcated structure.

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