Nonlinear gyrokinetic theory, the direct interaction approximation, and anomalous thermal transport in tokamaks

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865793· OSTI ID:5196234

Hagan, W K; Frieman, E A

Invariance properties under scale transformations of the nonlinear gyrokinetic Vlasov and heat transport equations are used to examine anomalous thermal transport due to drift wave turbulence. To fully exploit the gyrokinetic expansion, separation of the fluctuations from the background by means of averaging is required. This leads to a statistical description of the system and the use of the direct interaction approximation. The invariance properties of the gyrokinetic and statistical descriptions produce the same results for chi, the thermal diffusivity. For a collisionless, low-..beta.., quasineutral plasma in a general magnetic field, a unique result is derived for chi.

• Research Organization: Science Applications International Corp., P.O. Box 2351, La Jolla, California 92038
• OSTI ID: 5196234
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 29:11; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
BOLTZMANN-VLASOV EQUATION
CLOSED PLASMA DEVICES
COLLISIONLESS PLASMA
DIFFERENTIAL EQUATIONS
DRIFT INSTABILITY
ENERGY TRANSFER
EQUATIONS
HEAT TRANSFER
INSTABILITY
INVARIANCE PRINCIPLES
KINETIC EQUATIONS
LOW-BETA PLASMA
MAGNETIC FIELDS
MECHANICS
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
SCALING LAWS
STATISTICAL MECHANICS
THERMAL DIFFUSIVITY
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSFORMATIONS
TURBULENCE