Transition from resistive- G to. eta. sub i - driven turbulence in stellarator systems

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859683· OSTI ID:5535033

Hong, B ^[1]; Horton, W; Hamaguchi, S ^[2]; Wakatani, M; Yagi, M; Sugama, H ^[3]

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1. Korea Atomic Energy Research Institute, P. O. Box 7, Dae Duk Dan Ji, Tae-Jeon, Korea (KR)
2. Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (USA)
3. Plasma Physics Laboratory, Kyoto University, Gokasho, Uji 611, Japan (JP)

By an electromagnetic incompressible two-fluid model describing both ion temperature gradient drift modes ({eta}{sub {ital i}} modes) and resistive interchange modes ({ital g} modes), a new type of {eta}{sub {ital i}} mode is studied in cylindrical geometry including magnetic shear and an averaged curvature of Heliotron/Torsatron. This {eta}{sub {ital i}} mode is destabilized by the coupling to the unstable {ital g} mode. Finite plasma pressure beta increases the growth rate of this mode and the radial mode width also increases with plasma pressure beta indicating large anomalous transport in the Heliotron/Torsatron configuration. The transport from {eta}{sub {ital i}} mode exceeds that from resistive {ital g} when the mean-free-path exceeds the machine circumference. For plasma beta above two to three times the Suydam limit, the {ital m}=1/{ital n}=1 growth rate increases from the {eta}{sub {ital i}} mode value to the magnetohydrodynamic (MHD) value.

• DOE Contract Number: FG05-80ET53088
• OSTI ID: 5535033
• Journal Information: Physics of Fluids B; (USA), Journal Name: Physics of Fluids B; (USA) Vol. 3:7; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BETA RATIO
CLOSED PLASMA DEVICES
CONFIGURATION
COUPLING
CYLINDRICAL CONFIGURATION
DIFFUSION
DRIFT INSTABILITY
ELECTROMAGNETISM
FLUID FLOW
FLUID MECHANICS
FLUTE INSTABILITY
HELIOTRON
HYDRODYNAMICS
INCOMPRESSIBLE FLOW
INSTABILITY
INSTABILITY GROWTH RATES
ION TEMPERATURE
MAGNETIC FIELDS
MAGNETISM
MECHANICS
NUMERICAL SOLUTION
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA MICROINSTABILITIES
SHEAR
STABILITY
STELLARATORS
TEMPERATURE GRADIENTS
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
TURBULENCE