Implicit PIC Simulations of Magnetic Guide-Field Reconnection*

Details Implicit PIC Simulations of Magnetic Guide-Field Reconnection* Implicit PIC Simulations of Magnetic Guide-Field Reconnection*

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31b1736d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM31B-1736

Physics

2753 Numerical Modeling, 7829 Kinetic Waves And Instabilities, 7833 Mathematical And Numerical Techniques (0500, 3200), 7835 Magnetic Reconnection (2723, 7526), 7839 Nonlinear Phenomena (4400, 6944)

Scientific paper

Implicit PIC simulations of magnetic reconnection starting from a Harris equilibrium with a guide field |Bg| = |B0| have been carried out using the "PARSEK" implicit Particle in Cell (PIC) code. Conditions in 2D are similar to those of explicit PIC simulations by Pritchett [1], with the following differences: An initial flux perturbation is added to hasten island formation and a variety of mass ratios, Mi/me=64 and upward are introduced and with results compared. Secondary island formation is found, as well as high parallel electron velocities at magnetic island separatrices and in the electron diffusion region. Particle distributions are analyzed in these regions with e-i (Buneman) and e-e instabilities found, respectively, in these two regions. Vlasov simulations are used to follow the nonlinear evolution of these instabilities, including the formation of electron phase space holes (bipolar fields) with different speeds and half-widths (Goldman, et al., [2]).
* Research supported by NASA
[1] P. L. Pritchett, Phys. Plasmas, 12, 062301, (2005).
[2] M.V. Goldman, D.L. Newman and P. L. Pritchett, "Vlasov Simulations of Electron Holes driven by Particle Distributions from PIC Reconnection Simulations with a Guide Field," submitted to Geophys.~Res.~Lett.(2008).

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