Hall magnetohydrodynamics of inhomogeneous current layers

Details Hall magnetohydrodynamics of inhomogeneous current layers Hall magnetohydrodynamics of inhomogeneous current layers

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh32c..06r&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH32C-06

Physics

7835 Magnetic Reconnection, 7843 Numerical Simulation Studies

Scientific paper

Analytical and numerical results of the dynamics of inhomogeneous, reversed field current layers in the Hall limit (i.e., characteristic length scales less than or comparable to the ion inertial length) are presented. Specifically, the two and three dimensional evolution of a current layer that supports a reversed field plasma configuration and has a density gradient along the current direction is studied. We find that a density inhomogeneity along the current direction can dramatically redistribute the magnetic field and plasma via magnetic shock-like or rarefaction waves. The relative direction between the density gradient and current flow plays a critical role in the evolution of the current sheet. One important result is that the current sheet can become very thin rapidly when the density gradient is directed opposite to the current. Our results are applied to laboratory and space plasmas.
Research supported by NASA and ONR.

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