Publications related to Effect of triangular and elongated plasma shape on the sawtooth stability

Integrated real-time control of MHD instabilities using multi-beam ECRH/ECCD systems on TCV

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, Jonathan Rossel

Simultaneous real-time control of multiple MHD instabilities is experimentally demonstrated in the TCV tokamak. Multiple sources of EC heating and current drive, injected through real-time controlled launchers, are used to stabilize 3/2 and 2/1 neoclassica ...

2012

Integrated modelling of ICRH in a quasi-axisymmetric stellarator

Jonathan Graves, Wilfred Anthony Cooper, Martin Jucker

We apply the code package SCENIC to a two field-period quasi-axisymmetric stellarator. Ion cyclotron resonance heating (ICRH) is applied both on the high-and low-field side to a 1% He-3 minority in a deuterium plasma. It is shown that due to toroidal varia ...

2012

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

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

Overview of the ITER EC H&CD system and its capabilities

Olivier Sauter, Timothy Goodman, Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, René Chavan, Laurie Porte, Jean-Daniel Landis, Francisco Sanchez, Ioannis Pagonakis, Robert Bertizzolo, Hartmut Zohm, Emanuele Poli

The Electron Cyclotron (EC) system for the ITER tokamak is designed to inject >= 20 MW RF power into the plasma for Heating and Current Drive (H&CD) applications. The EC system consists of up to 26 gyrotrons (between 1 and 2 MW each), the associated power ...

Elsevier2011

KSTAR equilibrium operating space and projected stabilization at high normalized beta

Holger Reimerdes, Joo Yeon Kim, Ji Hyun Kim

Along with an expanded evaluation of the equilibrium operating space of the Korea Superconducting Tokamak Advanced Research, KSTAR, experimental equilibria of the most recent plasma discharges were reconstructed using the EFIT code. In near-circular plasma ...

2011

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

Measurement and modeling of three-dimensional equilibria in DIII-D

Holger Reimerdes

A detailed experiment-theory comparison reveals that linear ideal MHD theory is in quantitative agreement with external magnetic and internal soft x-ray measurements of the plasma response to externally applied non-axisymmetric fields over a broad range of ...

American Institute of Physics2011

Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core

Olivier Sauter, Jonathan Graves, Wilfred Anthony Cooper

Magnetohydrodynamic equilibrium states with a three-dimensional helical core are computed to model the MAST spherical tokamak and the RFX-mod reversed field pinch. The boundary is fixed as axisymmetric. The MAST equilibrium state has the appearance of an i ...

2011

Individual Sawtooth pacing by synchronized ECCD in TCV

Olivier Sauter, Basil Duval, Timothy Goodman, Jonathan Graves, Duccio Testa, Holger Reimerdes, Federico Alberto Alfredo Felici

Previous real-time sawtooth control scenarios using EC actuators have attempted to shorten [1] or lengthen [2] the sawtooth period by optimally positioning the EC absorption near the q=1 surface. In new experiments we demonstrate for the first time that in ...

AIP conference Proceedings2011

Effect of triangular and elongated plasma shape on the sawtooth stability

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Integrated real-time control of MHD instabilities using multi-beam ECRH/ECCD systems on TCV

Integrated modelling of ICRH in a quasi-axisymmetric stellarator

Bifurcated Helical Core Equilibrium States in Tokamaks

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

Overview of the ITER EC H&CD system and its capabilities

KSTAR equilibrium operating space and projected stabilization at high normalized beta

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

Measurement and modeling of three-dimensional equilibria in DIII-D

Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core

Individual Sawtooth pacing by synchronized ECCD in TCV

Integrated real-time control of MHD instabilities using multi-beam ECRH/ECCD systems on TCV

Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core

Integrated modelling of ICRH in a quasi-axisymmetric stellarator

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

Overview of the ITER EC H&CD system and its capabilities

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

Bifurcated Helical Core Equilibrium States in Tokamaks

Measurement and modeling of three-dimensional equilibria in DIII-D

KSTAR equilibrium operating space and projected stabilization at high normalized beta

Individual Sawtooth pacing by synchronized ECCD in TCV