Threshold condition for non-linear tearing modes in tokamaks
The non-linear evolution of low mode number tearing modes is analysed, emphasizing the need for a threshold condition, to account for observations in tokamaks. The discussion is illustrated by 2 models recently introduced in the literature. The models can be compared with the available data and/or serve as a basis for planning experiments in order either to test theory (by means of beta-limit scaling laws, as proposed in this paper) or to attempt to control undesirable tearing modes. Introducing a threshold condition in the tearing mode stability analysis is found to reveal some bifurcation points and thus domains of intrinsic stability in the island dynamics operational space.
Bibliographic Reference: Article: Nuclear Fusion, Vol. 37 (1997) No. 3, pp. 361-370
Record Number: 199710546 / Last updated on: 1997-05-09
Original language: en
Available languages: en