Toward 3D MHD modeling of neoclassical tearing mode suppression by ECCD

We propose a framework to extend the magnetohydrodynamic (MHD) equa- tions to include electron cyclotron current drive (ECCD) and discuss previous models proposed by Giruzzi et al.(2) and by Hegna and Callen(3). To model neoclassical tear- ing mode (NTM) instabilities and study the growth of magnetic islands as NTMs evolve, we employ the nonlinear reduced-MHD simulation JOREK. We present tearing-mode growth-rate calculations from JOREK simulations.

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