Fitting of the Rutherford Equation for Neoclassical Tearing Mode stabilisation in ASDEX Upgrade

Influence of neoclassical tearing modes on confined fast ions in ASDEX Upgrade

Neoclassical tearing modes (NTMs) form large magnetic islands on magnetic surfaces with rational safety factors q=m/n where m and n are small integers. Islands cause flattening of plasma temperature and density profiles; therefore they significantly degrade the confinement. It was shown that the perturbed topology of the magnetic field leads to enhanced losses of fast ions from trapped orbits [...

Modelling and experiments on NTM stabilisation

In the next fusion device ITER the so-called neoclassical tearing modes (NTMs) are foreseen as being extremely detrimental to plasma confinement. This type of resistive instability is related to the presence in the plasma of magnetic islands. These are experimentally controlled with local electron cyclotron current drive (ECCD) and the island width decay during NTM stabilisation is modelled usi...

Time-dependent Simulations of Neoclassical Tearing Mode Stabilization in TCV

Multimachine Extrapolation of Neoclassical Tearing Mode Physics to ITER

New data and inter-machine comparisons are presented exploring the role of rotation, ρ and error fields in governing tearing mode β limits. It is found that conventional aspect ratio tokamak βN limits due to 2/1 tearing modes fall from values in excess of 3 with the usual strong neutral beam torque injection, to ~2 in low torque plasmas for ITER-like baseline scenarios. The fractional rates of ...

H-mode plasma transport simulation in ITER with effect of neoclassical tearing mode