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Costanza Zucca

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Related publications (39)

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Safety factor profile requirements for electron ITB formation in TCV

Olivier Sauter, Stefano Coda, Ambrogio Fasoli, Basil Duval, Henri Weisen, Jonathan Bryan Lister, Timothy Goodman, Richard Pitts, Yves Martin, Stefano Alberti, Yann Camenen, Antoine Pochelon, Jean-Marc Moret, Sun Hee Kim, Minh Quang Tran, Kurt Appert, Roland Behn, Jan Horacek, Jean-Philippe Hogge, René Chavan, Laurie Porte, Mikhail Maslov, Marco Wischmeier, Markus Siegrist, Alexander Karpushov, Alberto Bottino, Damien Fasel, Emiliano Fable, Petri Nikkola, Philippe Marmillod, Costanza Zucca, Gilbert Tonetti, Andrei Martynov, Andrea Scarabosio, Xavier Llobet, Christian Schlatter, Alessandro Bortolon, Albert Perez, Gilles Arnoux, Yanis Andrebe, Blaise Marlétaz, Alessandro Marinoni, Ugo Siravo, Pierre Lavanchy, Igor Klimanov, Barbora Bruant Gulejová, Pierre-François Isoz, Alexey Zabolotskiy, Jonathan Rossel, Emmanuel Droz, Jean-Claude Magnin, Ilya Pavlov, Karin Schombourg, Pierre Etienne

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

Modeling and control of the current density profile in tokamaks and its relation to electron transport

Costanza Zucca

The current density in tokamak plasmas strongly affects transport phenomena, therefore its understanding and control represent a crucial challenge for controlled thermonuclear fusion. Within the vast framework of tokamak studies, three topics have been tac ...

EPFL2009

Power requirements for electron cyclotron current drive and ion cyclotron resonance heating for sawtooth control in ITER

Olivier Sauter, Jonathan Graves, Stefano Coda, Timothy Goodman, Costanza Zucca, Martin Jucker

13 MW of electron cyclotron current drive (ECCD) power deposited inside the q = 1 surface is likely to reduce the sawtooth period in ITER baseline scenario below the level empirically predicted to trigger neoclassical tearing modes (NTMs). However, since t ...

IOP Publishing Ltd2013

Snowflake Divertor Plasmas on TCV

Olivier Sauter, Stefano Coda, Basil Duval, Richard Pitts, Antoine Pochelon, Jean-Marc Moret, Ivo Furno, Federico Alberto Alfredo Felici, Costanza Zucca, Francesco Piras, Attila Bencze

Starting from a standard single null X-point configuration, a second order null divertor (snowflake (SF)) has been successfully created on the Tokamak à Configuration Variable (TCV) tokamak. The magnetic properties of this innovative configuration have bee ...

PPCF2008

The physics of electron internal transport barriers in the TCV tokamak

Olivier Sauter, Stefano Coda, Timothy Goodman, Roland Behn, Emiliano Fable, Costanza Zucca, Alessandro Marinoni

Electron internal transport barriers (elTBs) are generated in the TCV tokamak with strong electron cyclotron resonance heating in a variety of conditions, ranging from steady-state fully noninductive scenarios to stationary discharges with a finite inducti ...

International Atomic Energy Agency2007

Inward thermodiffusive particle pinch in electron internal transport barriers in TCV

Olivier Sauter, Stefano Coda, Henri Weisen, Timothy Goodman, Emiliano Fable, Costanza Zucca, Alexey Zabolotskiy

Electron internal transport barriers (eITBs) are obtained in TCV with different heating and current drive schemes. They are sustained in steady-state conditions for several energy confinement and current redistribution times. In these scenarios, the densit ...

2006

Modulation of electron transport during Swing ECCD discharges in TCV

Olivier Sauter, Timothy Goodman, Stefano Alberti, Costanza Zucca

Generation of a swing electron cyclotron current drive (swing ECCD), i.e. driving alternated, symmetric, positive or negative local ECCD, during a single discharge and at constant total input EC power, was performed at the Tokamak a Configuration Variable ...

IOP2009

Rapid electron internal transport barrier formation during magnetic shear reversal in fully non-inductive TCV discharges

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Yann Camenen, Emiliano Fable, Costanza Zucca, Petri Nikkola

The rapid formation of an electron internal transport barrier (eITB) is observed during a slow evolution (similar or equal to 200 ms) from a centrally peaked to a hollow current density profile, while all external actuators remain constant. The time consta ...

IOP Publishing Ltd2005

Nonlinear dynamics of flute modes and self-organization phenomena in turbulent magnetized plasma

Costanza Zucca

A two-fields model that self-consistently describes the coupled, spectral dynamics of flute mode large-scale flows turbulence is presented. This model has a characteristic form of a 'predator-prey' system, in which the populations of flute mode quanta (pre ...

2007

On the Requirements to Control Neoclassical Tearing Modes in Burning Plasmas

Olivier Sauter, Costanza Zucca

Neoclassical tearing modes (NTMs) are magnetic islands which increase locally the radial transport and therefore degrade the plasma performance. They are self-sustained by the bootstrap current perturbed by the enhanced radial transport. The confinement de ...

2009

Current density evolution in electron internal transport barrier discharges in TCV

Olivier Sauter, Stefano Coda, Timothy Goodman, Emiliano Fable, Costanza Zucca

Simulations of the plasma current density evolution in electron internal transport barrier discharges on the Tokamak a Configuration Variable (TCV) have been performed, in order to determine the relationship between the safety-factor profile and the electr ...

2009

Studies of Electron Transport and Current Diffusion in Switched ECCD experiments on TCV

Olivier Sauter, Timothy Goodman, Stefano Alberti, Roland Behn, Emiliano Fable, Costanza Zucca

The aim of the present work is to provide a better insight on the magnetic shear profile modification in the Switched ECCD experiments. Modelling of the plasma current density is carried on by the ASTRA transport code employed in both predictive and interp ...

2006

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

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

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

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

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

Partial Stabilization and Control of Neoclassical Tearing Modes in Burning Plasmas

Olivier Sauter, Costanza Zucca

2006

On the heating mix of ITER

Olivier Sauter, Minh Quang Tran, Costanza Zucca, Frank Rüdiger Wagner

This paper considers the heating mix of ITER for the two main scenarios. Presently, 73MWof absorbed power are foreseen in the mix 20/33/20 for ECH, NBI and ICH. Given a sufficient edge stability, Q = 10 the goal of scenario 2 can be reached with 40MW power ...

IOP2010

The role of MHD in the sustainment of electron internal transport barriers and H-mode in TCV confinement during flat-top eITB plasmas on TCV

Olivier Sauter, Stefano Alberti, Timothy Goodman, Laurie Porte, Costanza Zucca

2007

Costanza Zucca

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Safety factor profile requirements for electron ITB formation in TCV

Modeling and control of the current density profile in tokamaks and its relation to electron transport

Power requirements for electron cyclotron current drive and ion cyclotron resonance heating for sawtooth control in ITER

Snowflake Divertor Plasmas on TCV

The physics of electron internal transport barriers in the TCV tokamak

Inward thermodiffusive particle pinch in electron internal transport barriers in TCV

Modulation of electron transport during Swing ECCD discharges in TCV

Rapid electron internal transport barrier formation during magnetic shear reversal in fully non-inductive TCV discharges

Nonlinear dynamics of flute modes and self-organization phenomena in turbulent magnetized plasma

On the Requirements to Control Neoclassical Tearing Modes in Burning Plasmas

Current density evolution in electron internal transport barrier discharges in TCV

Studies of Electron Transport and Current Diffusion in Switched ECCD experiments on TCV

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

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

Partial Stabilization and Control of Neoclassical Tearing Modes in Burning Plasmas

On the heating mix of ITER

The role of MHD in the sustainment of electron internal transport barriers and H-mode in TCV confinement during flat-top eITB plasmas on TCV

Towards q-profile reconstruction through fast-MHD analysis on TCV

The Physics of Electron Internal Transport Barriers in the TCV Tokamak

Physics of steady-state electron internal transport barriers on TCV