Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..781...32k&link_type=abstract
THE PHYSICS OF COLLISIONLESS SHOCKS: 4th Annual IGPP International Astrophysics Conference. AIP Conference Proceedings, Volume
Astronomy and Astrophysics
Astrophysics
Shock Waves, Ion Beams, Astrophysical Plasma, Acceleration, Space Research, Planetary Bow Shocks, Interplanetary Shocks, Magnetohydrodynamics And Plasmas, Atomic, Molecular, Ion, And Heavy-Particle Collisions
Scientific paper
The physics of collisionless shocks is controlled by the ion dynamics. The generation of gyrating ions by reflection as well as the formation of field-aligned ion beams are essential parts of this dynamic. On the one hand reflection is most likely the first interaction of ions with the shock before they undergo the downstream thermalization process. On the other hand field-aligned ion beams, predominately found at the quasi-perpendicular bow shock, propagate into the distant foreshock region and may create wave activity. We revisit ion reflection, the source and basic production mechanism of field-aligned ion beams, by using multi-spacecraft measurements and contrast these observations with existing theories. Finally, we propose an alternative production mechanism.
Kucharek Harald
Möbius Eberhard
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