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Stefano Coda

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Related publications (367)

On the non-stiffness of edge transport in L-mode tokamak plasmas

Stephan Brunner, Roland Behn, Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Alexander Karpushov, Yann Camenen, Lucia Isabel Federspiel, Doohyun Kim, Gabriele Merlo, Antoine Pierre Emmanuel Alexis Merle, Donghyun Kim

Transport analyses using first-principle turbulence codes and 11/2-D transport codes usually study radial transport properties between the tokamak plasma magnetic axis and a normalized minor radius around 0.8. In this region, heat transport shows significa ...

Amer Inst Physics2014

Power exhaust in the snowflake divertor for L- and H-mode TCV tokamak plasmas

Basil Duval, Holger Reimerdes, Stefano Coda, Benoît Labit, Wouter Vijvers

The snowflake (SF) divertor is a plasma configuration that may enable tokamak operation at high performance and lower peak heat loads on the plasma-facing components than a standard single-null divertor. This paper reports on the results of experiments per ...

IOP Publishing Ltd2014

Optimization of experimental snowflake configurations on TCV

Jean-Marc Moret, Holger Reimerdes, Stefano Coda

The design of a snowflake (SF) equilibrium requires a strong effort on the poloidal field (PF) currents in terms of MAturns and mechanical loads. This has limited the maximum plasma current in SF configurations on Tokamak a Configuration Variable (TCV) to ...

International Atomic Energy Agency2014

Comparative analysis of digital pulse processing methods at high count rates

Philippe Marmillod, Stefano Coda, Silvano Gnesin, Josef Kamleitner

An extensive study of digital pulse processing methods is presented. Existing methods, both traditional and more recent, are compared with original advanced techniques within an appropriate modeling and benchmarking framework. This comprehensive approach e ...

Elsevier Science Bv2014

Complete multi-field characterization of the geodesic acoustic mode in the TCV tokamak

Stephan Brunner, Laurent Villard, Stefano Coda, Laurie Porte, Thibaut Vernay, Cornelis Adrianus de Meijere, Julien Stanislas Pierre Dominski, Zhouji Huang, Gabriele Merlo

The geodesic acoustic mode (GAM) is a coherently oscillating zonal flow that may regulate turbulence in toroidal plasmas. Uniquely, the complete poloidal and toroidal structure of the magnetic component of the turbulence-driven GAM has been mapped in the T ...

Iop Publishing Ltd2014

Overview of recent and current research on the TCV tokamak

Stefano Coda

Through a diverse research programme, the Tokamak a Configuration Variable (TCV) addresses physics issues and develops tools for ITER and for the longer term goals of nuclear fusion, relying especially on its extreme plasma shaping and electron cyclotron r ...

International Atomic Energy Agency2013

Advanced divertor configurations with large flux expansion

Basil Duval, Holger Reimerdes, Stefano Coda, Mario Ludovico Podesta, Benoît Labit, Wouter Vijvers

Experimental studies of the novel snowflake divertor concept (D. Ryutov, Phys. Plasmas 14 (2007) 064502) performed in the NSTX and TCV tokamaks are reviewed in this paper. The snowflake divertor enables power sharing between divertor strike points, as well ...

Elsevier Science Bv2013

Bifurcated Helical Core Equilibrium States in Tokamaks

Wilfred Anthony Cooper, Basil Duval, Antoine Pochelon, Olivier Sauter, Trach-Minh Tran, Holger Reimerdes, Stefano Coda, Jonathan Graves, Benoît Labit, David Pfefferlé, Federico David Halpern, Daniele Brunetti

Tokamaks with weak to moderate reversed central shear in which the minimum inverse rotational transform (safety factor) qmin is in the neighbourhood of unity can trigger bifurcated magnetohydrodynamic equilibrium states, one of which is similar to a satura ...

IOP Publishing Ltd2013

Development of real-time plasma analysis and control algorithms for the TCV tokamak using SIMULINK

Basil Duval, Timothy Goodman, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Lucia Isabel Federspiel, Alessandro Bortolon, Andreas Pitzschke, James Paley, Francesco Piras, Federico Alberto Alfredo Felici, Wouter Vijvers, Hoang Bao Le

One of the key features of the new digital plasma control system installed on the TCV tokamak is the possibility to rapidly design, test and deploy real-time algorithms. With this flexibility the new control system has been used for a large number of new e ...

Elsevier2013

Real-time control of the period of individual ELMs by EC power on TCV

Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Jonathan Rossel, Federico Alberto Alfredo Felici

The period of individual type-I edge-localized modes (ELMs) in TCV H-mode plasmas is controlled by real-time controlled application of electron cyclotron (EC) power close to the plasma pedestal. An ELM pacing algorithm, closely related to sawtooth pacing [ ...

IOP Publishing Ltd2013

Power distribution in the snowflake divertor in TCV

Basil Duval, Holger Reimerdes, Stefano Coda, Benoît Labit, Wouter Vijvers, Federico Nespoli

TCV experiments demonstrate the basic power exhaust properties of the snowflake (SF) plus and SF minus divertor configurations by measuring the heat fluxes at each of their four divertor legs. The measurements indicate an enhanced transport into the privat ...

Iop Publishing Ltd2013

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

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

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

Development and validation of a tokamak skin effect transformer model

Jean-Marc Moret, Stefano Coda, Federico Alberto Alfredo Felici

A lumped parameter, state space model for a tokamak transformer including the slow flux penetration in the plasma (skin effect transformer model) is presented. The model does not require detailed or explicit information about plasma profiles or geometry. I ...

IOP Publishing Ltd2012

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

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

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 ...

IOP Publishing Ltd2012

Observations on turbulence and beam-ion driven modes in TEXTOR

Stefano Coda, Mattia Albergante, Cornelis Adrianus de Meijere

At a sufficiently weak toroidal magnetic field, neutral beam injection heated, limited plasmas in the TEXTOR tokamak exhibit bursts of beam-ion driven 'fishbone' and Alfven modes, which are characterized for the first time using the multi-antenna reflectom ...

Iop Publishing Ltd2012

Bifurcated Helical Core Equilibrium States in Tokamaks

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

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 by electron cyclotron waves in a tokamak plasma

Timothy Goodman, Yves Martin, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Jonathan Rossel, Duccio Testa, Federico Alberto Alfredo Felici

Electron cyclotron resonance heating is applied to the edge of a high-confinement (H-mode) plasma featuring type I edge-localized modes (ELMs) in the TCV tokamak. As the deposition location is shifted gradually in a highly controlled manner towards the pla ...

IOP Publishing Ltd2012

Stephan Brunner, Basil Duval, Timothy Goodman, Jean-Marc Moret, Antoine Pochelon, Olivier Sauter, Laurent Villard, Holger Reimerdes, Stefano Coda, Alberto Bottino, Sébastien Jolliet, Jonathan Rossel, Alexander Karpushov, Laurie Porte, Paolo Angelino, Benoît Labit, Alessandro Marinoni, Mikael Rancic, Andreas Pitzschke, Dávid Wágner, David Nicholas Wagner

2012

Page 14 of 19

Stefano Coda

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On the non-stiffness of edge transport in L-mode tokamak plasmas

Power exhaust in the snowflake divertor for L- and H-mode TCV tokamak plasmas

Optimization of experimental snowflake configurations on TCV

Comparative analysis of digital pulse processing methods at high count rates

Complete multi-field characterization of the geodesic acoustic mode in the TCV tokamak

Overview of recent and current research on the TCV tokamak

Advanced divertor configurations with large flux expansion

Bifurcated Helical Core Equilibrium States in Tokamaks

Development of real-time plasma analysis and control algorithms for the TCV tokamak using SIMULINK

Real-time control of the period of individual ELMs by EC power on TCV

Power distribution in the snowflake divertor in TCV

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

Development and validation of a tokamak skin effect transformer model

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

Observations on turbulence and beam-ion driven modes in TEXTOR

Bifurcated Helical Core Equilibrium States in Tokamaks

Edge-localized mode control by electron cyclotron waves in a tokamak plasma

Control of magnetohydrodynamic stability by phase space engineering of energetic ions in tokamak plasmas

Dependence of L-mode confinement on the electron cyclotron power deposition profile in the TCV tokamak

Recent TCV results – innovative plasma shaping to improve plasma properties and insight