Drift-wave turbulence with wave--wave and wave--particle nonlinear effects in a sheared slab

Journal Article · Tue Nov 01 00:00:00 EST 1983 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864071· OSTI ID:5537603

Waltz, R E; Dominguez, R R

Low-..beta.. tokamaks have drift-wave density fluctuations (n/n) with the characteristics of strong turbulence. To describe their spectra, earlier work (Phys. Fluids 26, 169 (1983)) with simple wave--wave nonlinear coupling models in two dimensions is extended to more physical electrostatic models for drift waves in three dimensions. The electrons are treated with a linear nearly Boltzmann response. The cold ions have nonlinear cross-field drift motion and linear parallel motion. Numerical methods based on the direct interaction approximation are applied to both wave--wave and wave--particle nonlinear effects, and the spectral intensity I/sub k//sub x/k/sub y/k/sub parallel/..omega.. (n/n = (rho/sub s//L/sub n/)I/sup 1//sup ///sup 2/) for a sheared slab is calculated. The shear causes a linear coupling of adjacent k/sub x/ and k/sub parallel/ modes. A suggested extension to toroidal geometry is made. Many similarities with experiments are found: Iperpendicular is nearly isotropic in k/sub perpendicular/ and peaked at k/sub perpendicular/rho/sub s/

• Research Organization: GA Technologies, Inc., San Diego, California 92138
• DOE Contract Number: AT03-76ET51011
• OSTI ID: 5537603
• Journal Information: Phys. Fluids; (United States), Vol. 26:11
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LOW-BETA PLASMA
DRIFT INSTABILITY
FLUCTUATIONS
NONLINEAR PROBLEMS
TURBULENCE
TOKAMAK DEVICES
PLASMA MICROINSTABILITIES
COUPLING
ION DRIFT
SHEAR
SLABS
CLOSED PLASMA DEVICES
INSTABILITY
PLASMA
PLASMA INSTABILITY
THERMONUCLEAR DEVICES
VARIATIONS
700108* - Fusion Energy- Plasma Research- Wave Phenomena
700105 - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)