Alfvén turbulence in collisionless plasmas |
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Authors: | Qinghuan Luo Don Melrose |
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Affiliation: | aSchool of Physics, University of Sydney, NSW 2006, Australia |
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Abstract: | The evolution of Alfvén turbulence due to three-wave interactions is discussed using kinetic theory for a collisionless, thermal plasma. In particular, we consider decay of Alfvén waves through three-wave coupling with an ion sound mode in the random-phase approximation. Two decay processes are of particular interest: an Alfvén wave decays into a backward propagating Alfvén wave and a forward propagating ion sound wave, and an Alfvén wave decays into a backward propagating fast magnetoacoustic wave and a forward ion sound wave. The former was widely discussed in the literature, particularly under the coherent wave assumption. The latter was not well explored and is discussed here. |
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Keywords: | Plasmas Turbulence Solar corona Solar wind |
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