MHD stability for a spherator with a purely poloidal magnetic field
Abstract
A localized analysis of the stability of a spherator with a purely poloidal magnetic field against MHD modes is presented. It is assumed that the closed-line concept is physically relevant for both linear equilibria and toroidal equilibria. In order to obtain a pressure distribution which decreases rapidly outwards and satisfies the closed-line interchange criterion, it is suggested that the plasma boundary be situated close to a magnetic separatrix. However, for finite beta-values, perturbations other than interchange modes may become unstable. It is found that the current density must be limited for stable equilibria, and that the maximum current density decreases rapidly in the region close to the separatrix.
- Publication:
-
Plasma Transport, Heating and MHD Theory
- Pub Date:
- 1978
- Bibcode:
- 1978pth..proc..191H
- Keywords:
-
- Magnetic Field Configurations;
- Magnetohydrodynamic Stability;
- Plasma Control;
- Plasma Equilibrium;
- Toroidal Plasmas;
- Boundary Layer Plasmas;
- Current Density;
- Energy Technology;
- Perturbation Theory;
- Tokamak Devices;
- Plasma Physics