Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31b1720m&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM31B-1720
Physics
7815 Electrostatic Structures, 7835 Magnetic Reconnection (2723, 7526), 7836 Mhd Waves And Instabilities (2149, 2752, 6050)
Scientific paper
Kinetic simulations of the magnetic reconnection in the geomagnetic tail have been completed including the presence of Oxygen and using physical mass ratio for electrons, protons and Oxygen ions. The possibility to achieve full kinetic treatment with the physical mass ratios for O+ and H+ is made possible by a new parallel implicit Particle-in-Cell (PARSEK). The approach is used to investigate the different time scales and low-frequency phenomena, associated to heavy ions in the geomagnetic tail. The role of Oxygen and real mass ratio for the different species is studied. Two types of processes are investigated in 2D: the drift instabilities in the current direction (LHDI) and reconnection. The effect of the presence of substantial populations of oxygen ions is considered for both type of processes. The combined effect of the two types of processes is then considered in fully 3D simulations demonstrating the effect of drift waves on the reconnection process.
Lapenta Giovanni
Markidis Stefano
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