Mode structure measurements of ion cyclotron emission and sub-cyclotron modes on DIII-D
We report mode structure measurements of coherent ion cyclotron emission (ICE) and sub-
cyclotron modes on DIII-D. Through a dedicated experiment, we aimed to characterize a …
cyclotron modes on DIII-D. Through a dedicated experiment, we aimed to characterize a …
Compressional Alfvén eigenmodes excited by runaway electrons
Compressional Alfvén eigenmodes (CAEs) driven by energetic ions have been observed in
magnetic fusion experiments. In this paper, we show that the modes can also be driven by …
magnetic fusion experiments. In this paper, we show that the modes can also be driven by …
Stabilization of Alfvén eigenmodes in DIII-D via controlled energetic ion density ramp and validation of theory and simulations
Fast-ion driven Alfvén waves with frequency close to the ion cyclotron frequency (f= 0.58 fci)
excited by energetic ions from a neutral beam are stabilized via a controlled energetic ion …
excited by energetic ions from a neutral beam are stabilized via a controlled energetic ion …
NSTX-U theory, modeling and analysis results
W Guttenfelder, DJ Battaglia, E Belova, N Bertelli… - Nuclear …, 2022 - iopscience.iop.org
The mission of the low aspect ratio spherical tokamak NSTX-U is to advance the physics
basis and technical solutions required for optimizing the configuration of next-step steady …
basis and technical solutions required for optimizing the configuration of next-step steady …
Analysis of high frequency Alfvén eigenmodes observed in ASDEX Upgrade plasmas in the presence of RF-accelerated NBI ions
R Ochoukov, S Sipilä, R Bilato, V Bobkov… - Nuclear …, 2023 - iopscience.iop.org
High frequency Alfvén eigenmodes in the ion cyclotron frequency range are actively
researched on the ASDEX Upgrade tokamak (AUG). The general properties of this particular …
researched on the ASDEX Upgrade tokamak (AUG). The general properties of this particular …
Impact of ICRF fast-ions on core turbulence and MHD activity in ASDEX upgrade
A Bilato, C Angioni, AB Navarro, V Bobkov… - AIP Conference …, 2023 - pubs.aip.org
Experiments in various tokamaks and their analysis identify the fast ions (FI) generated by
NBI and/or ICRF heating as one of the main causes of the observed improvement in core …
NBI and/or ICRF heating as one of the main causes of the observed improvement in core …
Hybrid simulations of sub-cyclotron compressional and global Alfvén eigenmode stability in spherical tokamaks
A comprehensive numerical study has been conducted in order to investigate the stability of
beam-driven, sub-cyclotron-frequency compressional Alfvén eigenmodes (CAEs) and global …
beam-driven, sub-cyclotron-frequency compressional Alfvén eigenmodes (CAEs) and global …
Observation of bi-directional global Alfvén eigenmodes in the MAST-U tokamak
The first observations and classification of deuterium beam-driven sub-cyclotron frequency
range Alfvén eigenmodes (AEs) are presented for the MAST-Upgrade tokamak. Sets of …
range Alfvén eigenmodes (AEs) are presented for the MAST-Upgrade tokamak. Sets of …
Application of simulations and theory of sub-cyclotron frequency modes to DIII-D
Theoretical and numerical study of Alfvén eigenmodes (AEs) in the sub-cyclotron frequency
range explains the observed frequency scaling with beam parameters in experiments across …
range explains the observed frequency scaling with beam parameters in experiments across …
[HTML][HTML] Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance
Conditions for net fast ion drive are derived for beam-driven, co-propagating, sub-cyclotron
compressional (CAE) and global (GAE) Alfvén eigenmodes driven by the Landau resonance …
compressional (CAE) and global (GAE) Alfvén eigenmodes driven by the Landau resonance …