99 citations · 489 across the 35 of their papers we have counts for
29 papers · 1 filter
Using Convolutional Neural Networks to detect Edge Localized Modes in DIII-D from Doppler Backscattering measurements
N. Q. X. Teo, V. H. Hall-Chen, K. Barada +6
In H-mode tokamak plasmas, the plasma is sometimes ejected beyond the edge transport barrier. These events are known as edge localized modes (ELMs). ELMs cause a loss of energy and…
Transition to super-diffusive transport in turbulent plasmas
Matteo Stanzani, Filippo Arlotti, Guido Ciraolo +2
We investigate the motion of charged particles in a turbulent electrostatic potential using guiding-center theory. By increasing the Larmor radius, the dynamics exhibit close-to-ba…
Self-consistent gyrokinetic modelling of turbulent and neoclassical tungsten transport in toroidally rotating plasmas
Kyungtak Lim, Xavier Garbet, Yanick Sarazin +4
The effect of toroidal rotation on both turbulent and neoclassical transport of tungsten (W) in tokamaks is investigated using the flux-driven, global, nonlinear 5D gyrokinetic cod…
Global linear stability analysis of kinetic Trapped Ion Mode (TIM) turbulence in tokamak plasma using spectral method
D. Mandal, M. Lesur, E. Gravier +4
Trapped ion modes (TIM) belong to the family of ion temperature gradient (ITG) modes, which are one of the important ingredients in heat turbulent transport at the ion scale in tok…
The Problem of Marginality in Model Reductions of Turbulence
C. Gillot, G. Dif-Pradalier, Y. Sarazin +8
Reduced quasilinear (QL) and nonlinear (gradient-driven) models with scale separations, commonly used to interpret experiments and to forecast turbulent transport levels in magneti…
Full Self-Consistent Vlasov-Maxwell Solution
Aurélien Cordonnier, Xavier Leoncini, Guilhem Dif-Pradalier +1
Full self-consistent stationary Vlasov-Maxwell solutions of magnetically confined plasmas are built for systems with cylindrical symmetries. The stationary solutions are thermodyna…
Transport barrier onset and edge turbulence shortfall in fusion plasmas
Guilhem Dif-Pradalier, Philippe Ghendrih, Yanick Sarazin +7
Turbulent plasmas notably self-organize to higher energy states upon application of additional free energy sources or modification of edge operating conditions. Mechanisms whereby…
Quasilinear gyrokinetic theory: A derivation of QuaLiKiz
Cole Darin Stephens, Xavier Garbet, Jonathan Citrin +3
In order to predict and analyze turbulent transport in tokamaks, it is important to model transport that arises from microinstabilities. For this task, quasilinear codes have been…
Nonlinear dynamics of the fishbone-induced alpha transport on ITER
G. Brochard, R. Dumont, H. Lütjens +3
The fishbone-induced transport of alpha particles is computed for the ITER 15 MA baseline scenario, using the nonlinear hybrid Kinetic-MHD code XTOR-K. Two limit cases have been st…
En route to realistic modeling of the kinetic-MHD interaction between macroscopic modes and fast particles induced by neutral beam injection in tokamaks
F. Orain, G. Brochard, T. Nicolas +4
A new model of fast ion source induced by Neutral Beam Injection (NBI) in tokamaks has been implemented in the hybrid kinetic-magnetohydrodynamic code XTOR-K. This source, combined…
Linear stability of the ITER 15 MA scenario against the alpha fishbone
G. Brochard, R. Dumont, H. Lütjens +1
The stability of the alpha-fishbone kinetic-MHD mode on the ITER 15 MA baseline scenario \cite{ITERB} is analyzed using the nonlinear hybrid Kinetic-MHD code XTOR-K. Quanti…
Flux driven pedestal formation in tokamaks: turbulence simulations validated against the isotope effect
G. De Dominici, G. Fuhr, P. Beyer +6
The spontaneous pedestal formation above a power threshold at the edge of magnetically confined plasma is modelled for the first time in flux driven three-dimensional fluid simulat…
Tractable flux-driven temperature, density, and rotation profile evolution with the quasilinear gyrokinetic transport model QuaLiKiz
J Citrin, C Bourdelle, F J Casson +14
Quasilinear turbulent transport models are a successful tool for prediction of core tokamak plasma profiles in many regimes. Their success hinges on the reproduction of local nonli…
Comparison between measured and predicted turbulence frequency spectra in ITG and TEM regimes
J. Citrin, H. Arnichand, J. Bernardo +6
The observation of distinct peaks in tokamak core reflectometry measurements - named quasi-coherent-modes (QCMs) - are identified as a signature of Trapped-Electron-Mode (TEM) turb…
Tailoring steep density profile with unstable points
Shun Ogawa, Xavier Leoncini, Alexei Vasiliev +1
The mesoscopic properties of a plasma in a cylindrical magnetic field are investigated from the view point of test-particle dynamics. When the system has enough time and spatial sy…
Geodesic acoustic modes with poloidal mode couplings ad infinitum
Rameswar Singh, Ö D Gürcan, X Garbet +4
Geodesic acoustic modes (GAMs) are studied, for the first time, including all poloidal mode couplings using drift reduced fluid equations. The nearest neighbor coupling patte…
PoPe (Projection on Proper elements) for code control: verification, numerical convergence and reduced models. Application to plasma turbulence simulations
T Cartier-Michaud, P Ghendrih, Y Sarazin +9
The Projection on Proper elements (PoPe) is a novel method of code control dedicated to 1) checking the correct implementation of models, 2) determining the convergence of numerica…
Angular momentum transport modeling: achievements of a gyrokinetic quasi-linear approach
P. Cottier, C. Bourdelle, Y. Camenen +5
QuaLiKiz, a model based on a local gyrokinetic eigenvalue solver is expanded to include momentum flux modeling in addition to heat and particle fluxes. Essential for accurate momen…
Beam-Plasma Instability and Fast Particles: the Lynden-Bell Approach
Nakia Carlevaro, Duccio Fanelli, Xavier Garbet +3
The beam-plasma instability, i.e. the response of the plasma bulk to the injection of supra thermal charged-particle beams, results to be appropriately characterized by a long-rang…
Asymptotic theory of magnetic island saturation in equilibria with a finite current gradient
Andrei Smolyakov, Alexander Poye, Olivier Agullo +2
A novel asymptotic matching procedure is developed to revisit the problem of magnetic island saturation in case of a finite current gradient at the rational surface. Nonlinear disp…
Effect of the curvature and the β parameter on the nonlinear dynamics of a drift tearing magnetic island
Magali Muraglia, Olivier Agullo, Masatoshi Yagi +6
We present numerical simulation studies of 2D reduced MHD equations investigating the impact of the electronic βparameter and of curvature effects on the nonlinear evolution of dri…
Microturbulence studies in RFX-mod
F Sattin, S C Guo, I Predebon +3
Present-days Reversed Field Pinches (RFPs) are characterized by quasi-laminar magnetic configurations in their core, whose boundaries feature sharp internal transport barriers, in…
Study of ITG modes in RFX-mod using TRB code
F. Sattin, X. Garbet, S. C. Guo
We present here a study about the stability of Ion-Temperature-Gradient drift turbulence in the Quasi-Single-Helicity regime of RFX-mod Reversed Field Pinch (RFP) using the TRB flu…
Shear flow effects on double tearing mode global magnetic reconnection
Thibaut Voslion, Olivier Agullo, Peter Beyer +5
The dynamics of a global reconnection in the presence of a poloidal shear flow which is located in between magnetic islands is investigated. Different linear regimes are identified…