Multiple states of nonlinear drift-tearing islands.
Nonlinear drift-tearing magnetic islands are studied numerically with a four-field model that includes the parallel ion dynamics. In certain regions of the parameter space, multiple solutions are found. In particular, linearly stable drift-tearing perturbations can grow to finite size magnetic islands when the amplitude of the initial perturbation is sufficiently large.
Association EURATOM-CEA, CEA/DSM/DRFC, CEA Cadarache, 13108 St. Paul-lez-Durance, France.
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