Three-dimensional Particle-in-cell Modeling of Component Magnetic Reconnection

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2724 Magnetopause, Cusp, And Boundary Layers, 2744 Magnetotail, 2753 Numerical Modeling, 2764 Plasma Sheet, 2788 Storms And Substorms

Scientific paper

Magnetic reconnection requires the demagnetization of both ions and electrons. In nearly anti-parallel magnetic field reversals, the more stringent requirement of electron demagntization is met through the bounce motion of electrons in region surrounding the reconnection line. The macroscopic manifestations of this process are primarily elecron pressure tensors with substantial deviations from gyrotropy. In field-reversals with rotation angles other than 180 degrees this is not necessarily true anymore. The presence of a sufficiently large magnetic field in the current direction magnetizes the electrons and prohibits bounce-type motions. We present an analysis of electron dissipation in component reconnection through the use of particle-in-cell modeling. In particular, we investigate the presence of electron nongyrotropies and the role of electron inertial processes in the potentially turbulent reconnecting current sheet.

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