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Renormalized turbulence theory of ion pressure gradient driven drift modes

Journal Article · · Phys. Fluids; (United States)
DOI:https://doi.org/10.1063/1.865616· OSTI ID:5919688
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From the nonlinear gyrokinetic equation we formulate the renormalized turbulence equation for the eta/sub i/ -mode drift wave instability. The study shows that the dominant nonlinear damping mechanism is from the E x B convection of the pressure fluctuation and that the kinetic modifications to the fluid E x B mode coupling, studied earlier, shift the spectrum toward the shorter wavelengths. Balancing the linear growth rate with the nonlinear damping rate at the linearly most unstable region, we calculate the anomalous ion thermal conductivity, which exceeds the neoclassical plateau formula and gives a value of the same order as that previously computed by Horton, Choi, and Tang (Phys. Fluids 26, 1077 (1981)), but with a kinetic enhancement factor. Also, the thermal conductivity formula remains finite for vanishing density gradient.
Research Organization:
Department of Physics, Korea Advanced Institute of Science and Technology, P.O. Box 150 Cheongryangni, Seoul, Korea
DOE Contract Number:
FG05-80ET53088
OSTI ID:
5919688
Journal Information:
Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 29:6; ISSN PFLDA
Country of Publication:
United States
Language:
English

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
700107 -- Fusion Energy-- Plasma Research-- Instabilities
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
ALCATOR DEVICE
CLOSED PLASMA DEVICES
COUPLING
DAMPING
DRIFT INSTABILITY
EQUATIONS
FLUCTUATIONS
INSTABILITY
KINETIC EQUATIONS
NONLINEAR PROBLEMS
OSCILLATION MODES
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA PRESSURE
PRESSURE GRADIENTS
RENORMALIZATION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS