Radial guiding center drifts and omnigenity in bumpy torus confinement systems

Journal Article · Sun May 01 04:00:00 EDT 1983 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864284· OSTI ID:6233497

Hazeltine, R D; Catto, P J

Collisional transport of a high-temperature plasma across the confining field of a bumpy torus magnetic confinement system depends sensitively upon the functional form of the radial guiding center drift, and thus upon details of the confinement geometry. A general and relatively explicit formula for the radial drift is derived, using the large aspect ratio results of a previous equilibrium study. Allowance is made for (i) arbitrary toroidal variation of the confining field; (ii) field distortion due to plasma currents; (iii) noncircular deformation of the toroidal field coils. However, the analysis pertains only to the plasma core, and not to the high-beta annuli (electron rings) which are usually present in experiments. The question of bumpy torus omnigenity: whether any bumpy torus field configuration is consistent with a vanishing, or nearly vanishing, radial drift: is also investigated. It is found that omnigenity cannot occur, at least in the vicinity of the magnetic axis.

• Research Organization: Plasma Research Institute, Science Applications, Inc., Boulder, Colorado 80302
• DOE Contract Number: AC03-76ET53057
• OSTI ID: 6233497
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 26:5; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
ASPECT RATIO
COLLISIONAL PLASMA
CONFINEMENT
ELMO BUMPY TORUS
ELMO DEVICES
EQUATIONS
GUIDING-CENTER APPROXIMATION
HOT PLASMA
KINETIC EQUATIONS
MAGNETIC FIELDS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
PLASMA CONFINEMENT
THERMONUCLEAR DEVICES
TRANSPORT THEORY
VARIATIONS