Nonlinear dynamics of the electromagnetic ion cyclotron structures in the inner magnetosphere

Physics – Plasma Physics

Scientific paper

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Magnetospheric Physics: Mhd Waves And Instabilities (2149, 6050, 7836), Nonlinear Geophysics: Nonlinear Waves, Shock Waves, Solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7852), Space Plasma Physics: Mhd Waves And Instabilities (2149, 2752, 6050), Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Space Plasma Physics: Solitons And Solitary Waves (4455)

Scientific paper

Electromagnetic ion cyclotron waves, called EMICs, are widely observed in the inner magnetosphere and can be excited through various plasma mechanisms such as ion temperature anisotropy. These waves interact with magnetospheric particles, which they can scatter into the loss cone. This paper investigates how nonlinearities in the ion fluid equations governing the electromagnetic ion cyclotron waves cause large-amplitude EMIC waves to evolve into coherent nonlinear structures. Both planar soliton structures and also two-dimensional vortex-like nonlinear structures are found to develop out of these nonlinearities.

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