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3. Effects of Hall Current in the Driven Reconnection with Various Scales

Author

Jin Shu-Ping and Yang Hong-Ang

Subjects
Physics, Resistive touchscreen, Inertial frame of reference, Condensed matter physics, General Physics and Astronomy, Initial current, Magnetic reconnection, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Ion, Physics::Plasma Physics, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Magnetohydrodynamics, Current (fluid)
Abstract

In the driven reconnection process with various scales, the effect of Hall current is studied numerically using a Hall magnetohydrodynamics (MHD) code derived from a multi-step implicit scheme. In the cases with Lc/di≤1.0 (Lc is the half-thickness of initial current layer, di is the ion inertial length), the features of Hall MHD reconnection are shown as follows: a quasi-steady single X-line reconnection is obtained, the By component with a quadrupolar structure is generated and the maximum reconnection rate is larger than 0.11. In the cases with Lc/di>1.0, the effect of Hall current on the reconnection dynamics weakens and Hall MHD reconnection is gradually transformed into resistive MHD reconnection as Lc/di increases.

Published
2004

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