Nonlinear studies of [ital m]=1 modes in high-temperature plasmas

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860355· OSTI ID:7173869

Aydemir, A Y ^[1]

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1. Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)

Nonlinear evolution of the [ital m]=1 mode is examined in high-temperature plasmas where the mode is in the semicollisional or collisionless regime. Unlike the finite [minus][Delta][prime]([ital m][ge]2) tearing modes, the nonlinear evolution of which is collisional, both the semicollisional and collisionless [ital m]=1 modes exhibit nonlinearly enhanced growth rates that far exceed their linear values, thus making their nonlinear evolution collisionless; this accelerated growth of a collisionless [ital m]=1 mode may explain the fast sawtooth crashes observed in large tokamaks.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 7173869
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 4:11; ISSN PFBPEI; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CLOSED PLASMA DEVICES
COLLISIONLESS PLASMA
FLUID MECHANICS
HOT PLASMA
HYDRODYNAMICS
INSTABILITY
INSTABILITY GROWTH RATES
MAGNETOHYDRODYNAMICS
MECHANICS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES