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Wavevector anisotropy of plasma turbulence at ion kinetic scales: solar wind observations and hybrid simulations

Narita, Y.; Motschmann, U.; Comişel, H.

Wavevector anisotropy of ion-scale plasma turbulence is studied at various values of ion beta. Two complementary methods are used. One is multi-point measurements of magnetic field in the near-Earth solar wind as provided by the Cluster spacecraft mission, and the other is hybrid numerical simulation of two-dimensional plasma turbulence. Both meth…

Four-dimensional energy spectrum for space-time structure of plasma turbulence

Narita, Y.

A parametric model of the inertial-range energy spectrum is constructed for plasma turbulence in the four-dimensional wave vector and frequency domain. The model is based on that of the Eulerian wavenumber-frequency spectrum developed for describing fluid turbulence, and includes wave vector anisotropies in the three-dimensional wave vector domain…