Effects of heavy ions on ULF waves in the magnetosphere

Details Effects of heavy ions on ULF waves in the magnetosphere Effects of heavy ions on ULF waves in the magnetosphere

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm21a0463k&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM21A-0463

Physics

2700 Magnetospheric Physics, 2753 Numerical Modeling, 2772 Plasma Waves And Instabilities

Scientific paper

We present a simulation study of the propagation of ULF waves in the magnetosphere when multi-ions such as helium and oxygen ions are present. Since the inclusion of multi-ions facilitates the propagation of waves for the band of frequency below each ion gyro-frequency, a multi-fluid treatment is required. We adopt a three-dimensional multi-fluid model, which can fully include the effects of multi-ions and electron. In a box model of an inhomogeneous plasma, we examine the resonant absorption through mode conversion when the MHD approximations break down. The wave spectra and energy relations are presented for ion cyclotron waves of helium and oxygen ions. In addition, the role of plasma composition in the wave coupling problem is investigated in detail. We discuss and compare our results with the previous theoretical and numerical studies.

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