High-frequency extensions of magnetorotational instability in astrophysical plasmas

Journal Article · Fri Aug 15 00:00:00 EDT 2008 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X08080060· OSTI ID:21399983

Mikhailovskii, A B ^[1]; Lominadze, J G ^[2]; Churikov, A P ^[3]; Pustovitov, V D; Erokhin, N N ^[1]; Tsypin, V S; Galvao, R M. O. ^[4]

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1. Russian Research Centre Kurchatov Institute, Institute of Nuclear Fusion (Russian Federation)
2. Kharadze Abastumani National Astrophysical Observatory (Georgia)
3. Syzran Branch of Samara Technical University (Russian Federation)
4. Brazilian Center for Physics Research (Brazil)

High-frequency extensions of magnetorotational instability driven by the Velikhov effect beyond the standard magnetohydrodynamic (MHD) regime are studied. The existence of the well-known Hall regime and a new electron inertia regime is demonstrated. The electron inertia regime is realized for a lesser plasma magnetization of rotating plasma than that in the Hall regime. It includes the subregime of nonmagnetized electrons. It is shown that, in contrast to the standard MHD regime and the Hall regime, magnetorotational instability in this subregime can be driven only at positive values of dln{Omega}/dlnr, where {Omega} is the plasma rotation frequency and r is the radial coordinate. The permittivity of rotating plasma beyond the standard MHD regime, including both the Hall regime and the electron inertia regime, is calculated.

• OSTI ID: 21399983
• Journal Information: Plasma Physics Reports, Vol. 34, Issue 8; Other Information: DOI: 10.1134/S1063780X08080060; Copyright (c) 2008 Pleiades Publishing, Ltd.; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASTROPHYSICS
ELECTRONS
MAGNETIZATION
MAGNETOHYDRODYNAMICS
MOMENT OF INERTIA
PERMITTIVITY
PLASMA INSTABILITY
ROTATING PLASMA
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
FERMIONS
FLUID MECHANICS
HYDRODYNAMICS
INSTABILITY
LEPTONS
MECHANICS
PHYSICAL PROPERTIES
PHYSICS
PLASMA