Effect of pressure anisotropy on magnetorotational instability

Journal Article · Fri Feb 15 00:00:00 EST 2008 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1007/S11447-008-2015-Y· OSTI ID:21075605

Mikhailovskii, A B ^[1]; Churikov, A P ^[2]; Erokhin, N N ^[1]; Erokhin, N S ^[3]; Tsypin, V S

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1. Russian Research Centre Kurchatov Institute, Institute of Nuclear Fusion (Russian Federation)
2. Syzran Branch of Samara Technical University (Russian Federation)
3. Russian Academy of Sciences, Space Research Institute (Russian Federation)

It is shown that two new instabilities of hybrid type can occur in a rotating magnetized plasma with anisotropic pressure, i.e., the rotational firehose instability and the rotational mirror instability. In the case of {beta}{sub parallel} > {beta}{sub perpendicular}, where {beta}{sub parallel} and {beta}{sub -perpendicular} are the ratios of the parallel and perpendicular plasma pressure to the magnetic field pressure, the pressure anisotropy tends to suppress both new instabilities; in the case {beta}{sub perpendicular} > {beta}{sub parallel}, it leads to their strengthening. In the latter case, the perturbations considered can be unstable even if the Velikhov instability criterion is not satisfied.

• OSTI ID: 21075605
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 106, Issue 2; Other Information: DOI: 10.1007/s11447-008-2015-y; Copyright (c) 2008 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
HOSE INSTABILITY
MAGNETIC FIELDS
PERTURBATION THEORY
PLASMA
PLASMA PRESSURE
PRESSURE DEPENDENCE