Linear and nonlinear Landau resonance of kinetic Alfvén waves: Consequences for electron distribution and wave spectrum in the solar wind

Rudakov, L.; Mithaiwala, M.; Ganguli, G.; Crabtree, C.
January 2011
Physics of Plasmas;Jan2011, Vol. 18 Issue 1, p012307
Academic Journal
Kinetic Alfvén wave turbulence in solar wind is considered and it is shown that non-Maxwellian electron distribution function has a significant effect on the dynamics of solar wind plasmas. Linear Landau damping leads to the formation of a plateau in the parallel electron distribution function which diminishes the Landau damping rate significantly. Nonlinear scattering of waves by plasma particles is generalized to short wavelengths and it is found that for the solar wind parameters this scattering is the dominant process as compared to three-wave decay and coalescence in the wave vector range 1/ρi


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