Abstract
Neoclassically driven tearing modes (NTM) are a major problem for tokamaks operating in a conventional ELMy H-mode scenario. Depending on the mode numbers these pressure driven perturbations cause a mild to strong reduction in the plasma pressure, thus limiting the maximum achievable normalized plasma pressure \(\beta_N = \beta_t /(\frac{I_p}{a B_t})\) , or can even lead to disruptions at low edge safety factor, \(q_ {95}\). A control of such modes in high \(\beta_N\) plasmas is therefore of vital interest for tokamaks. The control consists of two major approaches, namely the avoidance of the excitation of these modes and the removal, or at least mitigation of the impact of these modes, if the avoidance did not succeed. For both routes examples will be given and the applicability of these approaches to ITER will be discussed.
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