Neoclassical theory of momentum transport by collisional ions in strongly-rotating tokamak plasmas with unbalanced neutral-beam injection

Technical Report · Mon Oct 01 04:00:00 EDT 1990

OSTI ID:6311174

Stacey, W M; Neeley, G W

A neoclassical theory for momentum transport by collisional ions in a tokamak plasma with strong NBI and strong rotation is developed. A consistently ordered hierarchy of approximations to the kinetic equation are derived and solved to obtain expressions for particle flows, the radial electric field, poloidal asymmetries in density and potential, and the radial flux of toroidal angular momentum and the associated torque that acts to damp toroidal rotation. Upon decomposing the first-order distribution function into gyroangle-dependent and gyroangle-averaged components, neoclassical gyroviscosity is recovered from the former, and a new rotational viscosity of a collisional origin is recovered from the latter. The same viscosity coefficient and functional form is obtained for both types of viscosity. The magnitude and scaling with plasma parameters of the associated momentum damping rate has previously been demonstrated to be in agreement with a number of rotation experiments in tokamaks.

• Research Organization: Georgia Inst. of Tech., Atlanta, GA (USA). Fusion Research Center
• OSTI ID: 6311174
• Report Number(s): PB-91-127290/XAB; GTFR--96
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
BEAM INJECTION
BOLTZMANN EQUATION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COLLISIONAL PLASMA
DAMPING
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
EQUATIONS
FUNCTIONS
IONS
KINETICS
MOMENTUM TRANSFER
NEUTRAL ATOM BEAM INJECTION
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
ROTATING PLASMA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VISCOSITY