Neoclassical plasma viscosity and transport processes in non-axisymmetric tori

KC Shaing, K Ida, SA Sabbagh - Nuclear Fusion, 2015 - iopscience.iop.org
Neoclassical transport processes are important to the understanding of plasma confinement
physics in doubly periodic magnetized toroidal plasmas, especially, after the impact of the …

Interaction between a magnetic island and turbulence

MJ Choi - Reviews of Modern Plasma Physics, 2021 - Springer
Interaction between a magnetic island and turbulence has been intensively studied in recent
years with advance of plasma diagnostics in various plasma experiment devices such as …

Multiscale interaction between a large scale magnetic island and small scale turbulence

MJ Choi, J Kim, JM Kwon, HK Park, Y In, W Lee… - Nuclear …, 2017 - iopscience.iop.org
Multiscale interaction between the magnetic island and turbulence has been demonstrated
through simultaneous two-dimensional measurements of turbulence and temperature and …

Theory and observations of magnetic islands

FL Waelbroeck - Nuclear Fusion, 2009 - iopscience.iop.org
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 …

Effect of magnetic islands on profiles, flows, turbulence and transport in nonlinear gyrokinetic simulations

AB Navarro, L Bardóczi, TA Carter… - Plasma Physics and …, 2017 - iopscience.iop.org
Neoclassical tearing modes have deleterious effects on plasma confinement and, if they
grow large enough, they can lead to discharge termination. Therefore, they impose a major …

Plasma flows and fluctuations with magnetic islands in the edge plasmas of J-TEXT tokamak

KJ Zhao, YJ Shi, SH Hahn, PH Diamond, Y Sun… - Nuclear …, 2015 - iopscience.iop.org
The first comprehensive measurements of plasma flows and fluctuations nearby static
magnetic islands driven by resonant magnetic perturbations are presented. These …

Long term vortex flow evolution around a magnetic island in tokamaks

GJ Choi, TS Hahm - Physical Review Letters, 2022 - APS
We present a gyrokinetic analysis of the vortex flow evolution in a magnetic island in
collisionless tokamak plasmas. In a short term ω¯ D t< 1, where ω¯ D is the secular …

[HTML][HTML] Gyrokinetic simulation study of magnetic island effects on neoclassical physics and micro-instabilities in a realistic KSTAR plasma

JM Kwon, S Ku, MJ Choi, CS Chang, R Hager… - Physics of …, 2018 - pubs.aip.org
We perform gyrokinetic simulations to study the effects of a stationary magnetic island on
neoclassical flow and micro-instability in a realistic KSTAR plasma condition. Through the …

Electron-scale turbulence characteristics with varying electron temperature gradient in LHD

T Nasu, T Tokuzawa, M Nakata, K Ida, S Inagaki… - Nuclear …, 2024 - iopscience.iop.org
Electron-scale turbulence, whose wavelength is the electron Larmor radius, is thought to
have the potential to cause stiffness in an electron temperature gradient and degrade the …

Electron transport barrier and high confinement in configurations with internal islands close to the plasma edge of W7-X

N Chaudhary, M Hirsch, T Andreeva, J Geiger… - Nuclear …, 2024 - iopscience.iop.org
The low magnetic shear in the Wendelstein 7-X (W7-X) stellarator makes it feasible to shape
the separatrix by the large islands constituting an island-divertor, and this can be exploited …