Comment on 'Numerical study on neoclassical tearing mode stabilization via minimum seeking method for the island width growth rate'

摘要

The discussion in paper [1] is centred around the optimal method to localise a neoclassical tearing mode (NTM). Specifically, the authors compare two methods using the response of the NTM to a nearby electron cyclotron (EC) beam, since the closer the centre of the EC beam is to the centre of the NTM, the stronger the stabilising effect will be. The paper in question compares the efficacy of using the amplitude of the NTM (island width, w(t)) or the island width growth rate dw(t)/dt for a controller. The paper concludes that using the island width growth rate is both faster and more robust.