Neoclassical transport processes are important to the understanding of plasma confinement
physics in doubly periodic magnetized toroidal plasmas, especially, after the impact of the …

The physics of non-axisymmetry is a far more important topic in the theory of toroidal fusion
plasmas than might be expected.(1) Even a small toroidal asymmetry in the magnetic field …

Theoretical guidance is needed on two disruption questions:(1) When is a tokamak
operating in a metastable state in which loss of control is credible (avoidance question)?(2) …

SPARC is being designed to operate with a normalized beta of that rises linearly with a
change in the plasma current. Massive material injection is planned to reduce the disruption …

Magnetic islands are a ubiquitous feature of magnetically confined plasmas. They arise as
the result of plasma instabilities as well as externally imposed symmetry-breaking …

Abstract Small three-dimensional (3D) magnetic field perturbations have many interesting
and possibly useful effects on tokamak and quasi-symmetric stellarator plasmas. Plasma …

The interaction of externally applied small non-axisymmetric magnetic perturbations (MP)
with tokamak high-confinement mode (H-mode) plasmas is reviewed and illustrated by …

The plasma-beta effect on the n= 1 resonant magnetic perturbation (RMP) field penetration
in purely radio-frequency (RF) wave heated discharges has been investigated in EAST. The …

Tokamaks are sensitive to deviations from axisymmetry as small as δ B/B 0∼ 10− 4⁠. These
nonaxisymmetric perturbations greatly modify plasma confinement and performance by …

The low-aspect ratio, low magnetic field and wide range of plasma beta of NSTX plasmas
provide new insight into the origins and effects of magnetic field errors. An extensive array of …