Physics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9412009t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Sept. 1, 1989, p. 12009-12014. Research sponsored by DOE and DNA.
Physics
15
Collisionless Plasmas, Computerized Simulation, Mach Number, Shock Waves, Bow Waves, Geomagnetism, Ion Cyclotron Radiation, Ion Temperature
Scientific paper
Results are presented from hybrid simulations of a high Alfven Mach number collisionless perpendicular shock in one, two, and three spatial dimensions. The implicit effects of dimensionality in the simulation model are examined. The one-dimensional simulations show that the dissipation mechanism is reflected ions. In the two-dimensional simulations, the ion temperature anisotropy associated with the reflected ions are relaxed by a collisionless electromagnetic instability. In the high Alfven Mach number limit, the instability causes the shock front to have rotating magnetic fields with almost equal amplitudes in each direction and large-amplitude density fluctuations.
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