Nonlocal magnetorotational instability

Details Nonlocal magnetorotational instability Nonlocal magnetorotational instability

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phpl...15e2109m&link_type=abstract

Physics of Plasmas, Volume 15, Issue 5, pp. 052109-052109-8 (2008).

Physics

9

Macroinstabilities, Magnetohydrodynamics, Laboratory Studies Of Space- And Astrophysical-Plasma Processes, Magnetohydrodynamics And Plasmas

Scientific paper

An analytical theory of the nonlocal magnetorotational instability (MRI) is developed for the simplest astrophysical plasma model. It is assumed that the rotation frequency profile has a steplike character, so that there are two regions in which it has constant different values, separated by a narrow transition layer. The surface wave approach is employed to investigate the MRI in this configuration. It is shown that the main regularities of the nonlocal MRI are similar to those of the local instability and that driving the nonaxisymmetric MRI is less effective than the axisymmetric one, also for the case of the nonlocal instability. The existence of nonlocal instabilities in nonmagnetized plasma is predicted.

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