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Space Physics MHD Research

This research focuses on the intricate dynamics of plasma sheets in the magnetosphere, addressing critical questions surrounding mass, momentum, and energy entry. Key issues explored include reconnection, Kelvin-Helmholtz instability, and the role of kinetic Alfven waves in mode conversion. The study also delves into entropy definitions and crises, the process of steady convection, and the mechanisms of ion heating. Additionally, the mapping technique's role in understanding heavy ions at the magnetopause is examined, alongside its implications for various planetary bodies, including Mercury and Jupiter.

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Space Physics MHD Research

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  1. Space Physics MHD Research Personnel: Jay R. Johnson Eun-Hwa Kim

  2. Key Issues: Entry and Transport

  3. Plasma Sheet Dynamics • How does mass, momentum and energy enter the magentosphere? • Reconnection • Kelvin-Helmholtz Instability • Kinetic Alfven Waves/Mode Conversion

  4. Plasma Sheet Dynamics • Entropy Definition global/total: S=p1/dv; specific/local: s = p/ • Entropy Crisis • Steady Convection • Substorm Transition • How are ions heated? • What convects cold plasma to the center of the plasma sheet? Mapping Technique

  5. Role of Heavy Ions • At Magnetopause • Reconnection (Threshold/Growth) • KH inertial effects (Inertial Scale Effects) • Mode Conversion (Strong Absorption) • At Planets • Mercury • Jupiter IIR AR

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