Energy and particle confinement in tokamaks is usually anomalous, greatly exceeding
neoclassical predictions. It is desirable to develop an understanding of the underlying …

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 …

A review of the present status of the theory of magnetic reconnection is given. In strongly
collisional plasmas reconnection proceeds via resistive current sheets, ie quasi-stationary …

An investigation is made into the electron temperature perturbations associated with tearing
modes in tokamak plasmas. It is found that there is a critical magnetic island width below …

The maximum normalized beta achieved in long-pulse tokamak discharges at low
collisionality falls significantly below both that observed in short pulse discharges and that …

A kinetic theory for the nonlinear evolution of a magnetic island in a collisionless plasma
confined in a toroidal magnetic system is presented. An asymptotic analysis of a Grad …

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 …

A generalization of reduced magnetohydrodynamics is constructed from moments of the
Fokker-Planck equation. The new model uses familiar aspect-ratio approximations but …

The stabilisation of plasma macroscopic instabilities by high energy particles is shown to be
a consequence of the conservation of the third adiabatic invariant, ie the magnetic flux …

The nonlinear behaviour of tearing modes in a plasma with density and temperature
gradients is reviewed. The effects of inhomogeneities can essentially modify the evolution of …