Particle and momentum confinement in tokamak plasmas with unbalanced neutral beam injection and strong rotation

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6091225

Malik, M A

There is a self-consistent theory of the effects of neutral beam injection on impurity transport in tokamak plasmas. The theory predicts that co-injection drives impurities outward and that counter-injection enhances the normally inward flow of impurities. The theory was applied to carry out a detailed analysis of the large experimental database from the PLT and the ISX-B tokamaks. The theory was found to generally model the experimental data quite well. It is, therefore, concluded that neutral beam co-injection can drive impurities outward to achieve clean central plasmas and a cool radiating edge. Theoretical predictions for future thermonuclear reactors such as INTOR, TIBER II, and ITER indicated that neutral beam driven flow reversal might be an effective impurity control method if the rate of beam momentum deposited per plasma ion is adequate. The external momentum drag, which is a pivotal concept in impurity flow reversal theory, is correctly predicted by the gyroviscous theory of momentum confinement. The theory was applied to analyze experimental data from the PLT and the PDX tokamaks with exact experimental conditions. The theory was found to be in excellent agreement with experiment over a wide range of parameters. It is, therefore, possible to formulate the impurity transport theory from first principles, without resort to empiricism.

• Research Organization: Georgia Inst. of Tech., Atlanta, GA (USA)
• OSTI ID: 6091225
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700103 -- Fusion Energy-- Plasma Research-- Kinetics
BEAM INJECTION
CLOSED PLASMA DEVICES
COMPARATIVE EVALUATIONS
CONTROL
IMPURITIES
ISX TOKAMAK
MATHEMATICAL MODELS
NEUTRAL ATOM BEAM INJECTION
PLASMA
PLT DEVICES
SELF-CONSISTENT FIELD
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS
TRANSPORT THEORY