Publications related to Nonlinear saturation of resistive tearing modes in a cylindrical tokamak with and without solving the dynamics

Suprathermal electron dynamics and MHD instabilities in a tokamak

Stefano Coda, Jonathan Graves, Joan Decker, Josef Kamleitner

The dynamics of suprathermal electrons in the presence of magnetohydrodynamics (MHD) activity and the excitation of MHD modes by suprathermal electrons are studied experimentally to improve the understanding of the interaction of fast particles with MHD in ...

2015

Simulation of bootstrap current in 2D and 3D ideal magnetic fields in Tokamaks

Olivier Sauter, Jonathan Graves, Wilfred Anthony Cooper, Madhusudan Raghunathan, Michael Pedro

We aim to simulate the bootstrap current for a MAST-like spherical tokamak using two approaches for magnetic equilibria including externally caused 3D effects such as Resonant Magnetic Perturbations (RMPs), the effect of toroidal ripple, and intrinsic 3D e ...

International Atomic Energy Agency2015

Validation study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges

Christian Gabriel Theiler

A validation study of local gyrokinetic simulations (GYRO [J. Candy and R. E. Waltz, J. Comput. Phys. {\bf186}, 545 (2003)]) near the edge region (r/a∼0.85) has been performed for two C-Mod ohmic discharges, namely one that is in the Linear Ohmic Confineme ...

2014

Turbulent regimes in the tokamak scrape-off layer

Paolo Ricci, Joaquim Loizu Cisquella, Sébastien Jolliet, Federico David Halpern, Annamaria Mosetto

We identify the turbulent regimes in the tokamak scrape-off layer as a function of plasma resistivity, electron to ion mass ratio, safety factor, and magnetic shear. We find that two main instabilities drive turbulence in the SOL: Drift Waves, with their r ...

2013

Comparison of linear and nonlinear plasma response models for non-axisymmetric perturbations

Wilfred Anthony Cooper

With the installation of non-axisymmetric coil systems on major tokamaks for the purpose of studying the prospects of ELM-free operation, understanding the plasma response to the applied fields is a crucial issue. Application of different response models, ...

American Institute of Physics2013

Bifurcated Helical Core Equilibrium States in Tokamaks

Olivier Sauter, Basil Duval, Stefano Coda, Jonathan Graves, Wilfred Anthony Cooper, Holger Reimerdes, Benoît Labit, Antoine Pochelon, David Pfefferlé, Federico David Halpern, Daniele Brunetti, Jonathan Rossel, Mattia Albergante

Tokamaks with weak to moderate reversed central shear in which the minimum rotational transform

q_{min}

is in the neighbourhood of unity can trigger bifurcated MagnetoHydrodynamic (MHD) equilibrium states, one of which is similar to a saturated ideal ...

2012

Edge Localized Mode Control in TCV

Jonathan Rossel

The Tokamak concept, based on magnetic confinement of a hydrogen plasma, is one of today's most promising paths to energy production by nuclear fusion. The experimental scenarios leading to the largest fusion rate are based on a high confinement plasma reg ...

EPFL2012

Equilibrium and stability in a heliotron with anisotropic hot particle slowing-down distribution

Jonathan Graves, Wilfred Anthony Cooper

The equilibrium and linear fluid Magnetohydrodynamic (MHD) stability in an inward-shifted large helical device heliotron configuration are investigated with the 3D ANIMEC and TERPSICHORE codes, respectively. A modified slowing-down distribution function is ...

American Institute of Physics2012

MHD equilibrium and stability of tokamaks and RFP systems with 3D helical cores

Olivier Sauter, Jonathan Graves, Wilfred Anthony Cooper

Bifurcated magnetohydrodynamic (MHD) equilibrium states are computed for ITER hybrid scenario and RFX-mod SHAx configurations with very flat or reversed core magnetic shear conditions. In the ITER studies, the minimum inverse rotational transform qmin is n ...

IOP Publishing2011

Pedestal Characteristics and MHD Stability of H-Mode Plasmas in TCV

Andreas Pitzschke

The tokamak à configuration variable (TCV) is unique in its ability to create a variety of plasma shapes and to heat the electron population in high density regimes using microwave power at the third harmonic of the electron cyclotron frequency. In the fra ...

EPFL2011

Nonlinear saturation of resistive tearing modes in a cylindrical tokamak with and without solving the dynamics

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Suprathermal electron dynamics and MHD instabilities in a tokamak

Simulation of bootstrap current in 2D and 3D ideal magnetic fields in Tokamaks

Validation study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges

Turbulent regimes in the tokamak scrape-off layer

Comparison of linear and nonlinear plasma response models for non-axisymmetric perturbations

Bifurcated Helical Core Equilibrium States in Tokamaks

Edge Localized Mode Control in TCV

Equilibrium and stability in a heliotron with anisotropic hot particle slowing-down distribution

MHD equilibrium and stability of tokamaks and RFP systems with 3D helical cores

Pedestal Characteristics and MHD Stability of H-Mode Plasmas in TCV

Suprathermal electron dynamics and MHD instabilities in a tokamak

Simulation of bootstrap current in 2D and 3D ideal magnetic fields in Tokamaks

Pedestal Characteristics and MHD Stability of H-Mode Plasmas in TCV

Equilibrium and stability in a heliotron with anisotropic hot particle slowing-down distribution

Comparison of linear and nonlinear plasma response models for non-axisymmetric perturbations

Validation study of gyrokinetic simulation (GYRO) near the edge in Alcator C-Mod ohmic discharges

Edge Localized Mode Control in TCV

MHD equilibrium and stability of tokamaks and RFP systems with 3D helical cores

Turbulent regimes in the tokamak scrape-off layer

Bifurcated Helical Core Equilibrium States in Tokamaks