Near-specular reflection of ions at quasi-parallel shocks

Details Near-specular reflection of ions at quasi-parallel shocks Near-specular reflection of ions at quasi-parallel shocks

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.3859m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A3, p. 3859-3873.

Physics

4

Bow Waves, Earth Atmosphere, Ion Beams, Shock Fronts, Shock Wave Propagation, Wave Reflection, Distribution Functions, Electric Fields, Electromagnetic Fields

Scientific paper

One-dimensional hybrid simulations and a semianalytical model of the shock front are employed to investigate the source regions in the incident ion phase space of reflected and transmitted ions, the relative importance of the electric and magnetic forces in the reflection of incident ions, and how these characteristics change in time. The phase space origin of reflected particles and the fraction of incident ions that reflect are found to depend on the electromagnetic field structure of the shock front at the time the ions encounter it. The reflection fraction is maximized when the electric field along the shock normal (Ex) and the noncoplanar magnetic field (By) are at their maximum values. When Ex and By are large, the reflection process produces a beam that is cooler, more dense, and closer to specular than when they are small.

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