Nonlinear Evolution of the Internal Kink in Tokamaks
- 7 December 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 59 (23) , 2650-2653
- https://doi.org/10.1103/physrevlett.59.2650
Abstract
In a tokamak, if the safety factor becomes equal to unity in the plasma, the kinked plasma equilibrium which is accessible from the initial axisymmetric equilibrium through an internal-kink instability is itself unstable with respect to ballooning modes. This suggests a two-step mechanism for internal disruptions. First an internal-kink-type instability begins. Then the plasma pressure is released through the ballooning instability.
Keywords
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