The beta limit in the advanced toroidal facility due to local ideal MHD instabilities
The marginal pressure profile that is imposed either by ideal ballooning modes or by interchange modes on every nested flux surface of a three-dimensional equilibrium modelling the ATF device is determined for conditions of vanishing net toroidal plasma current. The corresponding limiting values are beta=3.75% and beta(0) = 9.89%. Mercier modes dominate in regions of strong stellarator - like magnetic shear. Non-symmetric ballooning modes (non-symmetric eigenstructures in the extended poloidal angle domain) dominate in regions with strong tokamak-like magnetic shear.
Bibliographic Reference: Article: Nuclear Fusion, Vol. 29 (1989), No. 4, pp. 617-627
Record Number: 198911029 / Last updated on: 1994-12-01
Original language: en
Available languages: en