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Abstract: The generation of zonal magnetic fields in laboratory fusion plasmas ispredicted by theoretical and numerical models and was recently observedexperimentally. It is shown that the modification of the current densitygradient associated with such corrugations can significantly affect thestability of the tearing mode. A simple scaling law is derived that predictsthe impact of small stationary current corrugations on the stability parameter$\Delta-$. The described destabilization mechanism can provide an explanationfor the trigger of the Neoclassical Tearing Mode NTM in plasmas withoutsignificant MHD activity.



Autor: F. Militello, M. Romanelli, R.J. Hastie, N.F. Loureiro

Fuente: https://arxiv.org/







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