Ion thermalization in quasi-perpendicular shocks involving reflected ions

Details Ion thermalization in quasi-perpendicular shocks involving reflected ions Ion thermalization in quasi-perpendicular shocks involving reflected ions

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.6337s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, May 1, 1990, p. 6337-6352.

Physics

123

Bow Waves, Normal Shock Waves, Particle Energy, Solar Terrestrial Interactions, Thermalization (Energy Absorption), Ampte (Satellites), Ion Distribution, Magnetic Field Configurations, Space Plasmas

Scientific paper

The thermalization mechanisms downstream of the quasi-perpendicular earth bow shock are investigated using magnetic-field and plasma data obtained by instruments aboard the AMPTE/IRM spacecraft. The relevant processes are studied in detail by examining low-Mach-number low-beta shocks (where beta is the ratio between the plasma pressure and magnetic pressure), for which the basic phenomena downstream of the ramp can be analyzed relatively easily because the excitation is low and the ion thermalization is slow. It is shown that the ion phase-space distributions and the waves approach a joint equilibrium, or quasi-linear 'plateau' some distance beyond the shock. By repeating the analysis for one representative example of a high-Mach-number high-beta shock, it is shown that the deductions are also valid for this most common state of the quasi-perpendicular bow shock.

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