Collisionless ballooning modes in a toroidal two-ion-component plasma

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871203· OSTI ID:165372

Jarmen, A; Malinov, P ^[1]

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1. Institute for Electromagnetic Field Theory and Plasma Physics, EURATOM-NFR Association, Chalmers University of Technology, S-41296 Goeteborg (Sweden)

A toroidal two-fluid model allowing for arbitrary magnetic field curvature is used to describe a contaminated plasma consisting of two ion species. A higher-order ballooning mode is identified in the high- and low-{alpha} regimes, and coexists with the ordinary ballooning mode in the medium-{alpha} regime ({alpha}=ballooning parameter). In the low-{alpha} regime the temperature-gradient-driven {eta}{sub {ital i}} mode is present. The impurities are, in general, found to be stabilizing---lowering the growth rate and narrowing the instability regime. Comparisons are made with ideal magnetohydrodynamics (MHD) and with a semilocal approximation of the eigenfunction, which are found to give a higher growth rate. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 165372
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 2; ISSN 1070-664X; ISSN PHPAEN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
COLLISIONLESS PLASMA
HIGH-BETA PLASMA
INSTABILITY GROWTH RATES
MAGNETOHYDRODYNAMICS
PLASMA IMPURITIES
PLASMA SIMULATION
TOKAMAK DEVICES