Turbulence in Collisionless Space Plasmas: a Comparative Study Between the Solar Wind and the Magnetosheath
Résumé
Recent studies of kinetic scales solar wind turbulence have revealed new features of the processes of energy cascade and dissipation at electron scales. However, several instrumental limitations have been found and shown to prevent one from deducing firm conclusions about the nature of the turbulence (e.g., scaling, anisotropy) at those scales. These limitations stem in particular from the low SNR (Signal-to-Noise-Ratio) in the solar wind due to the small amplitude of the electric and magnetic field fluctuations. To overcome this difficulty, we study the turbulence in the terrestrial magnetosheath (i.e., the region of the solar wind that is downstream of the Earths bow shock), where the turbulent fluctuations become enhanced, which yields a higher SNR. We have performed a statistical study using the Cluster wave data (1Hz
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Soumis le : mardi 9 juin 2020-12:08:33
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- HAL Id : hal-02862102 , version 1
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Fouad Sahraoui, S. Y. Huang, M. L. Goldstein. Turbulence in Collisionless Space Plasmas: a Comparative Study Between the Solar Wind and the Magnetosheath. AGU Fall Meeting, Dec 2013, San Francisco, California, United States. pp.SH51B-2100, 2013. ⟨hal-02862102⟩
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