Stabilization of the external kink and the resistive wall mode

MS Chu, M Okabayashi - Plasma Physics and Controlled Fusion, 2010 - iopscience.iop.org
The pursuit of steady-state economic production of thermonuclear fusion energy has led to
research on the stabilization of the external kink and the resistive wall mode. Advances in …

Rotation and momentum transport in tokamaks and helical systems

K Ida, JE Rice - Nuclear Fusion, 2014 - iopscience.iop.org
Poloidal and toroidal rotation has been recognized to play an important role in heat transport
and magnetohydrodynamic (MHD) stability in tokamaks and helical systems. It is well known …

PID-inspired inductive biases for deep reinforcement learning in partially observable control tasks

I Char, J Schneider - Advances in Neural Information …, 2024 - proceedings.neurips.cc
Deep reinforcement learning (RL) has shown immense potential for learning to control
systems through data alone. However, one challenge deep RL faces is that the full state of …

Toroidal self-consistent modeling of drift kinetic effects on the resistive wall mode

Y Liu, MS Chu, IT Chapman, TC Hender - Physics of plasmas, 2008 - pubs.aip.org
A self-consistent kinetic model is developed to study the stability of the resistive wall mode in
toroidal plasmas. This model is compared with other models based on perturbative …

Energetic ions in ITER plasmas

SD Pinches, IT Chapman, PW Lauber, HJC Oliver… - Physics of …, 2015 - pubs.aip.org
This paper discusses the behaviour and consequences of the expected populations of
energetic ions in ITER plasmas. It begins with a careful analytic and numerical consideration …

Saturated ideal modes in advanced tokamak regimes in MAST

IT Chapman, MD Hua, SD Pinches, RJ Akers… - Nuclear …, 2010 - iopscience.iop.org
MAST plasmas with a safety factor above unity and a profile with either weakly reversed
shear or broad low-shear regions, regularly exhibit long-lived saturated ideal …

Offline model-based reinforcement learning for tokamak control

I Char, J Abbate, L Bardóczi, M Boyer… - … for Dynamics and …, 2023 - proceedings.mlr.press
Control for tokamaks, the leading candidate technology for nuclear fusion, is an important
pursuit since the realization of nuclear fusion as an energy source would result in virtually …

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) …

Advances in global MHD mode stabilization research on NSTX

SA Sabbagh, JW Berkery, RE Bell, JM Bialek… - Nuclear …, 2010 - iopscience.iop.org
Stabilizing modes that limit plasma beta and reduce their deleterious effect on plasma
rotation are key goals for the efficient operation of a fusion reactor. Passive stabilization and …

Resistive wall mode instability at intermediate plasma rotation

JW Berkery, SA Sabbagh, R Betti, B Hu, RE Bell… - Physical Review Letters, 2010 - APS
Experimental observation of resistive wall mode (RWM) instability in the National Spherical
Torus Ex<? format?> periment (NSTX) at plasma rotation levels intermediate to the ion …