Control of plasma rotation by controlling the content of highly collisional ions in strongly rotating tokamak plasmas with unbalanced neutral beam injection

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Fusion Technology; (United States)

OSTI ID:6233431

Stacey, Jr, W M; Neeley, G W ^[1]

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1. Georgia Inst. of Technology, Atlanta (United States)

The control of plasma rotation in a tokamak by controlling the impurity content is investigated. A neoclassical theory for momentum transport by collisional ions in a tokamak plasma with strong neutral beam injection 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 [open quotes]rotational[close quotes] viscosity of a collisional origin is recovered from the latter. The same viscosity coefficient and functional form are obtained for both types of viscosity. 37 refs.

• DOE Contract Number: FG05-87ER51112
• OSTI ID: 6233431
• Journal Information: Fusion Technology; (United States), Journal Name: Fusion Technology; (United States) Vol. 23:2; ISSN 0748-1896; ISSN FUSTE8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330* -- Plasma Kinetics
Transport
& Impurities-- (1992-)
ANGULAR MOMENTUM
BEAM INJECTION
BEAM INJECTION HEATING
CLOSED PLASMA DEVICES
CONTROL
HEATING
IMPURITIES
NEOCLASSICAL TRANSPORT THEORY
NEUTRAL ATOM BEAM INJECTION
PARTICLE KINEMATICS
PLASMA
PLASMA HEATING
PLASMA IMPURITIES
ROTATING PLASMA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY