TITLE

Effect of current corrugations on the stability of the tearing mode

AUTHOR(S)
Militello, F.; Romanelli, M.; Hastie, R. J.; Loureiro, N. F.
PUB. DATE
March 2009
SOURCE
Physics of Plasmas;Mar2009, Vol. 16 Issue 3, p032101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The generation of zonal magnetic fields in laboratory fusion plasmas is predicted by theoretical and numerical models and was recently observed experimentally. It is shown that the modification of the current density gradient associated with such corrugations can significantly affect the stability of the tearing mode. A simple scaling law is derived that predicts the impact of small stationary current corrugations on the stability parameter Δ′. The described destabilization mechanism can provide an explanation for the trigger of the neoclassical tearing mode in plasmas without significant magnetohydrodynamic activity.
ACCESSION #
37258900

 

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