Role of explosive instabilities in high-β disruptions in tokamaks

  title={Role of explosive instabilities in high-$\beta$ disruptions in tokamaks},
  author={A. Aydemir and H.H. Lee and S.G. Lee and J. Seol and B.-H. Park and Yongkyoon In},
  journal={Nuclear Fusion},
Intrinsically explosive growth of a ballooning finger is demonstrated in nonlinear magnetohydrodynamic calculations of high-β disruptions in tokamaks. The explosive finger is formed by an ideally unstable n  =  1 mode, dominated by an m/n  =  2/1 component. The quadrupole geometry of the 2/1 perturbed pressure field provides a generic mechanism for the formation of the initial ballooning finger and its subsequent transition from exponential to explosive growth, without relying on secondary… 

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