The excitation mechanism for low-n edge harmonic oscillations in quiescent H-mode
regimes is identified analytically. We show that the combined effect of diamagnetic and …

A new dispersion relation, and associated stability criteria, is derived for low-n external kink
and infernal modes, and is applied to modelling the stability properties of quiescent H-mode …

The problem of pressure driven infernal type perturbations near the plasma edge is
addressed analytically for a circular limited tokamak configuration which presents an edge …

The equilibrium code, VMEC, is used to study external kinks in low b tokamaks and l ¼ 2
stellarators. The applicability of the code when modeling nonlinear MHD effects is explored …

Non-axisymmetric free-boundary equilibrium computations are shown to represent
nonlinearly saturated external kink modes and external kink-like sidebands coupled to …

It is shown that free boundary 3D equilibrium calculations in tokamak geometry are capable
of capturing the physics of non-linearly saturated external kink modes for monotonic current …

3D free boundary equilibrium computations have recently been used to model external kinks
and edge harmonic oscillations (EHOs), comparing with linear MHD stability codes, and …

Three dimensional free boundary magnetohydrodynamic equilibria that recover saturated
ideal kink/peeling structures are obtained numerically. Simulations that model the JET …

Helical distortion in the core region and its formation mechanism in weakly reversed
magnetic shear tokamak plasmas are investigated using three-dimensional …

The relaxation of the constraint of periodicity imposed by the external confining magnetic
field coils in a nominally 4-field period Helias advanced stellarator configuration produces …