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

• Autor(a) principal: Mikhailovskii,A.B.
• Data de Publicação: 2009
• Outros Autores: Pustovitov,V.D., Galvão,R.M.O., Amador,C.H.S., Lominadze,J.G., Churikov,A.P., Kharshiladze,O.A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Physics
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332009000100014
• topic: Magnetorotational instability; Plasma rotational instability

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.