Geodesic acoustic modes in magnetic confinement devices

GD Conway, AI Smolyakov, T Ido - Nuclear Fusion, 2021 - iopscience.iop.org
Geodesic acoustic modes (GAMs) are ubiquitous oscillatory flow phenomena observed in
toroidal magnetic confinement fusion plasmas, such as tokamaks and stellarators. They are …

Kinetic theory of geodesic acoustic modes in toroidal plasmas: a brief review

QIU Zhiyong, C Liu, F Zonca - Plasma Science and Technology, 2018 - iopscience.iop.org
Geodesic acoustic modes (GAM) are oscillating zonal structures unique to toroidal plasmas,
and have been extensively studied in the past decades due to their potential capabilities of …

A 5D gyrokinetic full-f global semi-Lagrangian code for flux-driven ion turbulence simulations

V Grandgirard, J Abiteboul, J Bigot… - Computer physics …, 2016 - Elsevier
This paper addresses non-linear gyrokinetic simulations of ion temperature gradient (ITG)
turbulence in tokamak plasmas. The electrostatic GYSELA code is one of the few …

Gyrokinetic investigation of Alfvén instabilities in the presence of turbulence

A Biancalani, A Bottino, A Di Siena… - Plasma Physics and …, 2021 - iopscience.iop.org
The nonlinear dynamics of beta-induced Alfvén eigenmodes (BAEs) driven by energetic
particles (EPs) in the presence of ion-temperature-gradient turbulence is investigated, by …

Analytic dispersion relation of energetic particle driven geodesic acoustic modes and simulations with NEMORB

D Zarzoso, A Biancalani, A Bottino, P Lauber… - Nuclear …, 2014 - iopscience.iop.org
Recent progress regarding the excitation of energetic-particle driven geodesic acoustic
modes (EGAMs) in particle-in-cell simulations is presented in this paper. The exact …

Simulation of energetic particle driven geodesic acoustic modes and the energy channeling in the Large Helical Device plasmas

H Wang, Y Todo, M Oasakabe, T Ido, Y Suzuki - Nuclear Fusion, 2019 - iopscience.iop.org
Energetic particle driven geodesic acoustic modes (EGAMs) in Large Helical Device
plasmas are investigated using MEGA code. MEGA is a hybrid simulation code for energetic …

Cross-code gyrokinetic verification and benchmark on the linear collisionless dynamics of the geodesic acoustic mode

A Biancalani, A Bottino, C Ehrlacher… - Physics of …, 2017 - pubs.aip.org
The linear properties of the geodesic acoustic modes (GAMs) in tokamaks are investigated
by means of the comparison of analytical theory and gyrokinetic numerical simulations. The …

Relation between energetic and standard geodesic acoustic modes

JB Girardo, D Zarzoso, R Dumont, X Garbet… - Physics of …, 2014 - pubs.aip.org
Geodesic Acoustic Modes (GAMs) are electrostatic, axisymmetric modes which are non-
linearly excited by turbulence. They can also be excited linearly by fast-particles; they are …

Effect of elongation on energetic particle-induced geodesic acoustic mode

A Di Siena, A Biancalani, T Görler, H Doerk… - Nuclear …, 2018 - iopscience.iop.org
The effect of the plasma elongation on the energetic-particle-induced geodesic acoustic
mode (EGAM) dynamics is studied with numerical simulations performed with the gyrokinetic …

Linear gyrokinetic particle-in-cell simulations of Alfvén instabilities in tokamaks

A Biancalani, A Bottino, S Briguglio, A Könies… - Physics of …, 2016 - pubs.aip.org
The linear dynamics of Alfvén modes in tokamaks is investigated here by means of the
global gyrokinetic particle-in-cell code ORB5, within the NEMORB project. The model …