Generation of Electric Field and Net Charge in Hall Reconnection

Details Generation of Electric Field and Net Charge in Hall Reconnection Generation of Electric Field and Net Charge in Hall Reconnection

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm23c..06m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM23C-06

Statistics

Applications

2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Generation of Hall electric field and net charge associated with magnetic reconnection is studied under different initial conditions of plasma density and magnetic field. With inclusion of the Hall effects, decoupling of the electron and ion motions leads to the formation of a narrow layer with strong electric field and large net charge density along the separatrix. The asymmetry of the plasma density or magnetic field or both across the current sheet will largely increase the magnitude of the electric field and net charge. The results indicate that the asymmetry of the magnetic field is more effective in producing larger electric field and charge density. The electric field and net charge are always much larger in the low density or/and high magnetic field side than in the high density or/and low magnetic field side. Both the electric field and net charge density are linearly dependent on the ratios of the plasma density or the square of the magnetic field across the current sheet. For the case with both initial asymmetries of the magnetic field and density, rather large Hall electric field and charge density are generated. The dependence of Hall electric field and charge density on the ion inertial lengths and its possible applications are also discussed.

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