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Yuri Litvinenko, University of New Hampshire, USA

Current sheet formation at a magnetic neutral line in Hall
magnetohydrodynamics

June 23, 2008, 3:15pm
Campus Golm, Building 28, Room 0.108

The dynamics of a plasma in the vicinity of a neutral line of the magnetic
field is considered in the framework of incompressible Hall
magnetohydrodynamics (MHD). A self-similar solution for the collapse to
a current sheet is obtained. Numerical and analytical results are
presented.
In contrast to the standard incompressible MHD model in two dimensions,
the Hall effect leads to the formation of finite-time singularites of
the velocity derivatives and the electric current density at the neutral
line.
Implications of the results for Hall MHD models of fast magnetic
reconnection are discussed.

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