On electromagnetic ballooning modes in fluid and kinetic descriptions

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.870992· OSTI ID:165799

Froejdh, M; Nordman, H; Jhowry, B ^[1]

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1. Institute for Electromagnetic Field Theory and EURATOM/NFR Association, Chalmers University of Technology, S-412 96 Goeteborg (Sweden)

A comparison between two-fluid, gyrofluid, and gyrokinetic descriptions of the collisionless ballooning mode in the toroidal limit is performed. The two-fluid model [A. Jarmen {ital et} {ital al}., Nucl. Fusion {bold 27}, 941 (1987)] is reactive and expanded in the finite-Larmor radius (FLR), in contrast to the gyrofluid model [R. E. Waltz {ital et} {ital al}., Phys. Fluids B {bold 4}, 3138 (1992)], which is dissipative and includes finite-Larmor-radius effects to all orders. The eigenmode differential equation is derived and solved numerically. It is shown that the fluid models are able to reproduce the gyrokinetic result, at least qualitatively. The role of the ion magnetic drift resonance and the ion FLR terms, in the fluid and kinetic descriptions, is discussed. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 165799
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
COLLISIONLESS PLASMA
EIGENSTATES
KINETIC EQUATIONS
LARMOR RADIUS
LOW-BETA PLASMA
MAGNETIC CONFINEMENT