Toroidal coupling and frequency spectrum of tearing modes
An important problem which has been addressed since the beginning of exploitation of Tokamak devices is the precise understanding of the MHD activity. Many calculations have been performed to cover the laminar phases where the modes maintain integrability of flux lines, as well as the disruptive phases where stochastic effects play a leading role. The theoretical analysis presented here reconsiders the former case in the spirit of a confrontation with the observed poloidal structures, growth rates and frequencies of the modes. Such data can provide useful information on the equilibrium characteristics which determine the radial structure of the various poloidal components of each unstable mode in the plasma bulk between the resonant layers, and also on the irreversible processes which, together with plasma rotation and diamagnetic effects, control the active coupling within the resonant layers.
Bibliographic Reference: Paper presented: 16th European Conference on Controlled Fusion and Plasma Physics, Venezia (IT), March 13-17, 1989
Availability: Available from (1) as Paper EN 34459 ORA
Record Number: 198910806 / Last updated on: 1994-12-01
Original language: en
Available languages: en