Collisional diffusion in a torus with imperfect magnetic surfaces

Technical Report · Tue Mar 01 00:00:00 EST 1983

OSTI ID:6293367

White, R B

A Hamiltonian forumlation of the guiding-center drift equations is used to investigate the modification of neoclassical diffusion for low collisonality in a toroidal magnetic field with partially destroyed magnetic surfaces. The magnetic field is assumed to be given by the small perturbation of an axisymmetric system. The results are applicable to particle diffusion in realistic confinement systems, midway between axisymmetric and purely stochastic ones. Significant enhancement of electron diffusion over neoclassical rates is found. This increase can be accounted for by the contributions due to the first few island chains in the Fibonacci sequence generated by the zero-order islands, and by associated stochastic domains.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6293367
• Report Number(s): PPPL-1984; ON: DE83010844
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEOCLASSICAL TRANSPORT THEORY
HAMILTONIANS
TOKAMAK DEVICES
TRANSPORT THEORY
DIFFUSION
GUIDING-CENTER APPROXIMATION
MAGNETIC SURFACES
PLASMA DRIFT
TOROIDAL CONFIGURATION
ANNULAR SPACE
CLOSED PLASMA DEVICES
CONFIGURATION
MAGNETIC FIELD CONFIGURATIONS
MATHEMATICAL OPERATORS
QUANTUM OPERATORS
SPACE
THERMONUCLEAR DEVICES
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)