Surface-wave instabilities in a plasma rotating with step-like frequency profile

AUTOR(ES)

Mikhailovskii, A.B., Pustovitov, V.D., Galvão, R.M.O., Amador, C.H.S., Lominadze, J.G., Churikov, A.P., Kharshiladze, O.A.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2009-03

RESUMO

An approach for the theory of nonlocal magnetorotational and convective instabilities in a rotating plasma is developed, on the basis of the surface wave concept, which allows the derivation of useful analytical results.It is assumed that the rotation frequency has a step-like profile, so that a narrow transition layer separates two regions with different rotation frequencies. The one-fluid magnetohydrodynamic (MHD) model for description of the perturbed plasma dynamics is used. It is shown that in the case of magnetized plasma the main properties of the nonlocal (surface-wave) instabilities are similar to those of the local ones.

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