Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm33b0457p&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM33B-0457
Physics
2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2760 Plasma Convection (2463), 2764 Plasma Sheet
Scientific paper
We present a computer model based on a new numerical algorithm that solves the system of nonlinear ideal MHD equations. The code uses dipolar coordinates and is designed specifically to simulate the near-Earth plasma sheet region which has a near-dipolar field line topology. The objective of this work is a detailed study of the inner plasma sheet as a region of particular importance for auroral processes, since there is substantial evidence of magnetosphere-ionosphere coupling and mapping between the inner plasma sheet and proton precipitation area. Two factors affecting the stability of the inner plasma sheet are considered - strong earthward plasma pressure gradients and magnetospheric convection. Modeling results show that pressure gradients occurring in the the plasma sheet lead to forming of a localized B-min region. Using the model, we have found a threshold of ballooning instability in the region. Finally, we examine effects of different convection patterns and perform stability analysis for these configurations.
Donovan Eric
Prosolin V. I.
Voronkov Igor
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