Plasma rotation effects on neoclassical tearing modes
نویسندگان
چکیده
The effect of an equilibrium sheared ow on the nonlinear evolution of a neoclassical tearing mode is investigated by estimating the inuence it has on the inner and outer layer dynamics of the mode. Two complementary approaches are adopted. A generalized Rutherford model calculation is carried out to estimate the ow contributions to the polarization current term in the inner layer. For the outer layer, ow induced changes in the stability parameter Δ� are estimated with the help of a 3D initial value reduced MHD code (NEAR). For realistic parameters it is found that the outer layer modication is the dominant one and the scaling of Δ� with the ow shear parameter appears to agree with recent experimental observations.
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