Renormalized non-modal theory of the kinetic drift instability of plasma shear flows

Details Renormalized non-modal theory of the kinetic drift instability of plasma shear flows Renormalized non-modal theory of the kinetic drift instability of plasma shear flows

2011-01-13

arxiv.org/abs/1101.2567v1

Physics

Plasma Physics

Scientific paper

The linear and renormalized nonlinear kinetic theory of drift instability of plasma shear flow across the magnetic field, which has the Kelvin's method of shearing modes or so-called non-modal approach as its foundation, is developed. The developed theory proves that the time-dependent effect of the finite ion Larmor radius is the key effect, which is responsible for the suppression of drift turbulence in an inhomogeneous electric field. This effect leads to the non-modal decrease of the frequency and growth rate of the unstable drift perturbations with time. We find that turbulent scattering of the ion gyrophase is the dominant effect, which determines extremely rapid suppression of drift turbulence in shear flow.

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