Magnetic reconnection controlled by external current drive

Time-dependent effects of a radiofrequency driven current on the magnetic island are investigated by applying a new extended magnetohydrodynamics nonlinear model. New basic problems are pointed out, together with results that shed light on crucial questions for the control of neoclassical tearing modes. An interpretation of the numerical results is found by analogy with the classical Hahm-Kulsrud-Taylor problem.