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

Journal Article · Sat Nov 01 00:00:00 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), Vol. 29:11
• Country of Publication: United States
• Language: English

Related Subjects

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