HR: 11:40h
AN: SM12A-05 INVITED     [Abstracts]
TI: The Role of the Heavy Ions in the Wave Magnetospheric Phenomena
AU: * Khazanov, G V
EM: George.V.Khazanov@nasa.gov
AF: NASA, Marshall Space Flight Center, 320 Sparkman Drive, Huntsville, AL 35805 United States
AU: Singh, N
AF: University of Alabama in Huntsville, 320 Sparkman Drive, Huntsville, AL 35805 United States
AU: Gamayunov, K
AF: NASA, Marshall Space Flight Center, 320 Sparkman Drive, Huntsville, AL 35805 United States
AU: Krivorutsky, E
AF: NASA, Marshall Space Flight Center, 320 Sparkman Drive, Huntsville, AL 35805 United States
AB: This talk will emphasize the role of the heavy ions in the number of wave-particle interaction magnetospheric processes. In particular, we will discuss some of the experimental and theoretical studies that have investigated the role of the heavy ions (mainly He+ and O+) in generation and propagation of electromagnetic ion cyclotron waves and their contribution to the heating of magnetospheric electrons and ions. The more recent studies have also shown that the heavy ions can greatly contribute to a generation of lower hybrid waves, ring current precipitation phenomena, and the overall energy redistribution in the inner magnetosphere. Using newly developed 2.5-dimentional particle-in-cell simulations, we study the energization and nonlinear coupling of different plasma waves in the presence of the heavy ions. We have shown that the high frequency wave modes critically depend on the heavy ion density and irrespective of the driven wave modes, both the light and heavy ions undergo significant transverse acceleration. But for the large heavy-ion densities, even the electrons are significantly accelerated in the parallel direction by the waves below the LH frequency.
DE: 2712 Electric fields (2411)
DE: 2720 Energetic particles, trapped
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting