The ideal stability of the internal kink mode is analysed for realistic tokamak geometry. Accurate numerical results demonstrate convergence with Bussac's toroidal solution (Bussac M N, Pellat R Edery D and Soule J L 1975 Phys. Rev. Lett. 35 1638) for inve ...

2005

Inductive current density perturbations to probe electron internal transport barriers in tokamaks

Roland Behn, Timothy Goodman, Olivier Sauter, Stefano Coda, Andrei Martynov, Petri Nikkola, Alberto Bottino, Emiliano Fable, Costanza Zucca

Improved electron energy confinement in tokamak plasmas, related to internal transport barriers, has been linked to nonmonotonic current density profiles. This is difficult to prove experimentally since usually the current profiles evolve continuously and ...

2005

High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak a Configuration Variable

Roland Behn, Timothy Goodman, Olivier Sauter, Stefano Coda, Andrei Martynov, Petri Nikkola, Alberto Bottino, Andrea Scarabosio, Yann Camenen, Emiliano Fable, Costanza Zucca

Important ingredients of the advanced-tokamak route to fusion have been explored in depth in the Tokamak a Configuration Variable [F. Hofmann, J. B. Lister, M. Anton , Plasma Phys. Controlled Fusion 36, B277 (1994)] over the past two years. Using a uniquel ...

American Institute of Physics2005

Safety factor profile requirements for electron ITB formation in TCV

Gilles Arnoux, Stefano Alberti, Kurt Appert, Roland Behn, René Chavan, Basil Duval, Damien Fasel, Ambrogio Fasoli, Timothy Goodman, Pierre-François Isoz, Pierre Lavanchy, Jonathan Bryan Lister, Xavier Llobet, Jean-Claude Magnin, Blaise Marlétaz, Philippe Marmillod, Yves Martin, Jean-Marc Moret, Albert Perez, Richard Pitts, Antoine Pochelon, Olivier Sauter, Markus Siegrist, Gilbert Tonetti, Minh Quang Tran, Henri Weisen, Jean-Philippe Hogge, Stefano Coda, Christian Schlatter, Andrei Martynov, Petri Nikkola, Alberto Bottino, Karin Schombourg, Alexey Zabolotskiy, Ugo Siravo, Marco Wischmeier, Jonathan Rossel, Pierre Etienne, Igor Klimanov, Jan Horacek, Andrea Scarabosio, Alexander Karpushov, , , , , , , , , , , ,

Sawtooth control in fusion plasmas

Timothy Goodman, Olivier Sauter, Stefano Coda, Andrei Martynov, Jonathan Graves

Clear observations of early triggering of neo-classical tearing modes by sawteeth with long quiescent periods have motivated recent efforts to control, and in particular destabilize, sawteeth. One successful approach explored in TCV utilizes electron cyclo ...

2005

Ideal MHD stability of tokamak plasmas with moderate and low aspect ratio

Andrei Martynov

The need of durable and abundant energy sources for future ages stimulates the studies of thermonuclear energy sources, based on hot plasma confinement by magnetic fields. The most developed concept of hot plasma trap is the tokamak, where the plasma confi ...

EPFL2005

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Barbora Bruant Gulejová

Sun Hee Kim

Mikhail Maslov

Emmanuel Droz

On the Tokamak a Configuration Variable (TCV), electron internal transport barriers (eITBs) can be formed during a gradual evolution from a centrally peaked to a hollow current profile while all external actuators are held constant. The formation occurs ra ...

2005