Ion temperature gradient-driven ballooning mode in tokamaks

Journal Article · Tue Feb 28 23:00:00 EST 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871437· OSTI ID:165030

Hirose, A; Zhang, L; Elia, M ^[1]

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1. Plasma Physics Laboratory, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0 (Canada)

It is shown that an ion temperature gradient ({eta}{sub {ital i}}) induces a collisionless ballooning mode in the MHD (magnetohydrodynamic) second stability regime. Both two-fluid and fully kinetic analyses predict the instability, in qualitative agreement, indicating that the ion magnetic drift resonance plays a key role in destabilization. The instability is characterized by broad eigenfunctions in the ballooning space and at a small magnetic shear has a growth rate comparable with that of the MHD mode. Trapped electrons, the ion transit effect, and magnetosonic perturbation have stabilizing influences, but are unable to suppress the mode. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 165030
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
INSTABILITY GROWTH RATES
ION TEMPERATURE
KINETIC EQUATIONS
MAGNETIC SURFACES
MAGNETOHYDRODYNAMICS
PLASMA FLUID EQUATIONS
TEMPERATURE GRADIENTS
TOKAMAK DEVICES