Tokamak discharges with improved energy confinement properties arising from internal
transport barriers (ITBs) have certain attractive features, such as a large bootstrap current …

The sawtooth instability in tokamak plasmas results in a periodic reorganization of the core
plasma. A typical sawtooth cycle consists of a quiescent period, during which the plasma …

Expressions for the neoclassical resistivity and the bootstrap current coefficients in terms of
aspect ratio and collisionality are widely used in simulating toroidal axisymmetric equilibria …

A survey has been carried out into the causes of all 2309 disruptions over the last decade of
JET operations. The aim of this survey was to obtain a complete picture of all possible …

A principal pressure limit in tokamaks is set by the onset of neoclassical tearing modes
(NTMs), which are destabilized and maintained by helical perturbations to the pressure …

This book bridges the gap between general plasma physics lectures and the real world
problems in MHD stability. In order to support the understanding of concepts and their …

Noninductive current drive has been performed in the tokamak ASDEX upgrade by injection
of radiofrequency waves at the second harmonic of the electron-cyclotron frequency in order …

The onset of a neoclassical tearing mode (NTM) depends on the existence of a large
enough seed island. It is shown in the Joint European Torus that NTMs can be readily …

The effectiveness of using localized current drive or heating to suppress the formation and
growth of neoclassical magnetohydrodynamic (MHD) tearing modes is addressed. The most …

The development of techniques for neoclassical tearing mode (NTM) suppression or
avoidance is crucial for successful high beta/high confinement tokamaks. Neoclassical …