Non-axisymmetric magnetic fields and toroidal plasma confinement

AH Boozer - Nuclear Fusion, 2015 - iopscience.iop.org
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 …

Observation of a multimode plasma response and its relationship to density pumpout and edge-localized mode suppression

C Paz-Soldan, R Nazikian, SR Haskey, NC Logan… - Physical review …, 2015 - APS
Density pumpout and edge-localized mode (ELM) suppression by applied n= 2 magnetic
fields in low-collisionality DIII-D plasmas are shown to be correlated with the magnitude of …

3D field phase-space control in tokamak plasmas

JK Park, YM Jeon, Y In, JW Ahn, R Nazikian, G Park… - Nature Physics, 2018 - nature.com
A small relaxation of the axisymmetric magnetic field of a tokamak into a non-axisymmetric
three-dimensional (3D) configuration can be effective to control magnetohydrodynamic …

Tailoring tokamak error fields to control plasma instabilities and transport

SM Yang, JK Park, YM Jeon, NC Logan, J Lee… - Nature …, 2024 - nature.com
A tokamak relies on the axisymmetric magnetic fields to confine fusion plasmas and aims to
deliver sustainable and clean energy. However, misalignments arise inevitably in the …

MHD stability and disruptions in the SPARC tokamak

R Sweeney, AJ Creely, J Doody, T Fülöp… - Journal of Plasma …, 2020 - cambridge.org
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 …

Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER

MJ Schaffer, JE Menard, MP Aldan, JM Bialek… - Nuclear …, 2008 - iopscience.iop.org
Large Type-I edge-localized mode (ELM) heat pulses may limit the life of divertor targets in a
burning plasma. Recent experiments show that pitch-resonant nonaxisymmetric magnetic …

ELM control with RMP: plasma response models and the role of edge peeling response

Y Liu, CJ Ham, A Kirk, L Li, A Loarte… - Plasma Physics and …, 2016 - iopscience.iop.org
Resonant magnetic perturbations (RMP) have extensively been demonstrated as a
plausible technique for mitigating or suppressing large edge localized modes (ELMs) …

Effects of 3D magnetic perturbations on toroidal plasmas

JD Callen - Nuclear Fusion, 2011 - iopscience.iop.org
Abstract Small three-dimensional (3D) magnetic field perturbations have many interesting
and possibly useful effects on tokamak and quasi-symmetric stellarator plasmas. Plasma …

Validation of the linear ideal magnetohydrodynamic model of three-dimensional tokamak equilibria

MJ Lanctot, H Reimerdes, AM Garofalo, MS Chu… - Physics of …, 2010 - pubs.aip.org
The first quantitative comparison of linear ideal magnetohydrodynamic (MHD) theory with
external magnetic measurements of the nonaxisymmetric plasma perturbation driven by …

Enhanced understanding of non-axisymmetric intrinsic and controlled field impacts in tokamaks

Y In, JK Park, YM Jeon, J Kim, GY Park, JW Ahn… - Nuclear …, 2017 - iopscience.iop.org
An extensive study of intrinsic and controlled non-axisymmetric field (δB) impacts in KSTAR
has enhanced the understanding about non-axisymmetric field physics and its implications …