Particle-in-cell simulation of Magnetotail dipolarization front and associated ion reflection

Details Particle-in-cell simulation of Magnetotail dipolarization front and associated ion reflection Particle-in-cell simulation of Magnetotail dipolarization front and associated ion reflection

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm11d..03w&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM11D-03

Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2744] Magnetospheric Physics / Magnetotail, [2753] Magnetospheric Physics / Numerical Modeling, [2772] Magnetospheric Physics / Plasma Waves And Instabilities

Scientific paper

For the Earth magnetotail, the Svenes et al. 2008 statistical study infers that the lobe density is highly variable, in the range 0.007-0.092 cm^{-3}. Such inflow density variation modifies reconnection diffusion region physical processes and reconnection rate drastically [Wu et al., 2011a]. This paper studies observable reconnection signatures in the downstream that are to be affected by this variation of the diffusion region physics. Using a 2.5-D particle-in-cell (PIC) code, we characterize the dipolarization front (DF) normal magnetic field, the DF propagation, the associated ion reflections, and the heating at various inflow densities. Our computational results re-affirm the current observational evidence of ion reflection [zhou et al., 2010]. Further, we predict a bipolar magnetic field straddling the neutral line and the fishbone instability inside the primary island. We identify the streaming of the reflected ions as the cause of the predict features.

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