Publications related to Development of statistical analysis tools for global observable of fluctuation data towards optimised real-time control applications

Basic Investigation of Turbulent Structures and Blobs of Relevance for Magnetic Fusion Plasmas

Similarly to neutral fluids, plasmas often exhibit turbulent behavior. Turbulence in plasmas is usually more complex than in neutral fluids due to long range interactions via electric and magnetic fields, and kinetic effects. It gives rise to many interest ...

EPFL2011

Understanding and taming plasma blobs in toroidal magnetized plasmas

Ivo Furno

Intermittent blobs, which propagate across a confining magnetic fields, are universally observed in natural and laboratory plasmas. In fusion plasmas, cross-field transport of particles and energy are associated, at least in part, with the propagation of b ...

2011

Real-time physics-model-based simulation of the current density profile in tokamak plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley

A new paradigm is presented to reconstruct the plasma current density profile in a tokamak in real-time. The traditional method of basing the reconstruction on real-time diagnostics combined with a real-time Grad-Shafranov solver suffers from the difficult ...

IOP2011

Balancing current drive and heating in DIII-D high noninductive current fraction discharges through choice of the toroidal field

Holger Reimerdes

In order to maintain stationary values of the stored energy and the plasma current in a tokamak discharge with all of the current driven noninductively, the sum of the α-heating power and the power required to provide externally driven current must be equa ...

2011

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Basil Duval, Alessandro Bortolon

Direction reversals of intrinsic toroidal rotation have been observed in Alcator C-Mod ohmic L-mode plasmas following modest electron density or toroidal magnetic field ramps. The reversal process occurs in the plasma interior, inside of the q = 3/2 surfac ...

2011

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Ambrogio Fasoli, Ivo Furno, Christian Gabriel Theiler, Nicola Vianello

In simple magnetized toroidal plasmas, field-aligned blobs originate from ideal interchange waves and propagate radially outward under the effect of

\grad B

and curvature induced

E \times B

drifts. We report on the first experimental two-dimensional me ...

2011

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Martin Jucker

The deployment of high power radio frequency waves in the ion cyclotron range (ICRF) constitutes an important operational facility in many plasma devices, including ITER. Any charged particle describes a helical motion around a given magnetic field line, t ...

EPFL2010

Experimental demonstration of an up-down asymmetry effect on intrinsic rotation in the TCV tokamak

Olivier Sauter, Basil Duval, Alexander Karpushov, Yann Camenen, Alessandro Bortolon, Lucia Isabel Federspiel, Francesco Piras

A new mechanism has recently been proposed that generates a radial flux of parallel momentum in toroidal plasmas. Namely, by considering up-down asymmetric flux surfaces, the symmetry following the magnetic field can be broken and an additional contributio ...

Institute of Physics2010

Transport and turbulence reduction with negative triangularity : Correlation ECE measurements in TCV

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Laurent Villard, Jean-Marc Moret, Stephan Brunner, Benoît Labit, Laurie Porte, Alexander Karpushov, Antoine Pochelon, Yann Camenen, Roland Behn, Alberto Bottino, Sébastien Jolliet, Emiliano Fable, Philippe Marmillod, Ben McMillan, Alessandro Marinoni, Lucia Isabel Federspiel, Andreas Pitzschke, Mikael Rancic

Turbulence and Transport Reduction with Negative Triangularity : Correlation ECE Measurements in TCV Due to turbulence, core energy transport in fusion devices such as tokamaks generally exceeds collisional transport by at least an order of magnitude. It i ...

2010

Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations

Antoine Pochelon

Turbulence and transport reduction with innovative plasma shapes in TCV -- correlation ECE measurement and gyrokinetic simulations Due to turbulence, core energy transport in tokamaks generally exceeds collisional transport by at least an order of magnitud ...

2010

Development of statistical analysis tools for global observable of fluctuation data towards optimised real-time control applications

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Basic Investigation of Turbulent Structures and Blobs of Relevance for Magnetic Fusion Plasmas

Understanding and taming plasma blobs in toroidal magnetized plasmas

Real-time physics-model-based simulation of the current density profile in tokamak plasmas

Balancing current drive and heating in DIII-D high noninductive current fraction discharges through choice of the toroidal field

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Experimental demonstration of an up-down asymmetry effect on intrinsic rotation in the TCV tokamak

Transport and turbulence reduction with negative triangularity : Correlation ECE measurements in TCV

Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations

Basic Investigation of Turbulent Structures and Blobs of Relevance for Magnetic Fusion Plasmas

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Experimental demonstration of an up-down asymmetry effect on intrinsic rotation in the TCV tokamak

Transport and turbulence reduction with negative triangularity : Correlation ECE measurements in TCV

Turbulence and transport reduction with innovative plasma shapes in TCV - correlation ECE measurements and gyrokinetic simulations

Understanding and taming plasma blobs in toroidal magnetized plasmas

Balancing current drive and heating in DIII-D high noninductive current fraction discharges through choice of the toroidal field

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Real-time physics-model-based simulation of the current density profile in tokamak plasmas