Nonlinear gyrokinetic simulations of reversed shear Alfven eigenmodes in DIII-D tokamak

P Liu, X Wei, Z Lin, G Brochard, GJ Choi… - Reviews of Modern …, 2023‏ - Springer
Global gyrokinetic simulations of reversed shear Alfven eigenmodes (RSAE) excited by
energetic particles (EP) in the DIII-D discharge# 159,243 find that self-generated zonal flows …

MAS: a versatile Landau-fluid eigenvalue code for plasma stability analysis in general geometry

J Bao, WL Zhang, D Li, Z Lin, G Dong, C Liu… - Nuclear …, 2023‏ - iopscience.iop.org
We have developed a new global eigenvalue code, multiscale analysis for plasma stabilities
(MAS), for studying plasma problems with wave toroidal mode number (n) and frequency (ω) …

Stability of beta-induced Alfvén eigenmodes (BAE) in DIII-D

WW Heidbrink, MA Van Zeeland, ME Austin… - Nuclear …, 2021‏ - iopscience.iop.org
Although the stability of ellipticity, toroidal and reversed-shear Alfvén eigenmodes (EAE,
TAE, RSAE) are relatively well understood, less is known about the stability of lower …

First Measurement of Drift-Alfvén Wave Polarization in Magnetically Confined Fusion Plasmas

X Du, L Chen, WW Heidbrink, MA Van Zeeland… - Physical Review Letters, 2024‏ - APS
Polarization of drift-Alfvén waves, defined as the ratio of electrostatic to electromagnetic
fluctuations, has remained unmeasurable in fusion plasmas for decades, despite its pivotal …

Verification and validation of linear gyrokinetic and kinetic-MHD simulations for internal kink instability in DIII-D tokamak

G Brochard, J Bao, C Liu, N Gorelenkov, G Choi… - Nuclear …, 2022‏ - iopscience.iop.org
Verification and linear validation of the internal kink instability in tokamak have been
performed for both gyrokinetic (GTC) and kinetic-MHD codes (GAM-solver, M3D-C1-K …

Cross-scale interaction between microturbulence and meso-scale reversed shear Alfvén eigenmodes in DIII-D plasmas

P Liu, X Wei, Z Lin, WW Heidbrink, G Brochard… - Nuclear …, 2024‏ - iopscience.iop.org
This paper reports global nonlinear gyrokinetic simulations that couple meso-scale reversed
shear Alfvén eigenmodes (RSAEs) driven by energetic particles (EPs) and ion temperature …

Theoretical studies of low-frequency Alfvén modes in tokamak plasmas

R Ma, L Chen, F Zonca, Y Li, Z Qiu - Plasma Physics and …, 2022‏ - iopscience.iop.org
The linear wave properties of the low-frequency Alfvén modes (LFAMs) observed in the DIII-
D tokamak experiments with reversed magnetic shear (Heidbrink et al 2021 Nucl. Fusion 61 …

Low-frequency shear Alfvén waves at DIII-D: Theoretical interpretation of experimental observations

R Ma, WW Heidbrink, L Chen, F Zonca, Z Qiu - Physics of Plasmas, 2023‏ - pubs.aip.org
The linear properties of the low-frequency shear Alfvén waves such as those associated with
the beta-induced Alfvén eigenmodes (BAEs) and the low-frequency modes observed in …

Visualization of fast ion phase-space flow in plasmas well-below, near and well-above Alfvén eigenmode stability threshold in tokamak

XD Du, WW Heidbrink, MA Van Zeeland… - Nuclear …, 2023‏ - iopscience.iop.org
Transport of fast ions along certain local phase space paths, referred to as fast ion phase-
space flow, has been systematically measured by an imaging neutral particle analyzer …

Visualization of fast ion phase-space flow driven by Alfvén instabilities

XD Du, MA Van Zeeland, WW Heidbrink… - Physical Review Letters, 2021‏ - APS
Fast ion phase-space flow, driven by Alfvén eigenmodes (AEs), is measured by an imaging
neutral particle analyzer in the DIII-D tokamak. The flow firstly appears near the minimum …