Publications de Stefano Coda | EPFL Graph Search

Publications associées (353)

Equilibrium reconstruction in an iron core tokamak using a deterministic magnetisation model

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill

In many tokamaks ferromagnetic material, usually referred to as an iron-core, is present in order to improve the magnetic coupling between the solenoid and the plasma. The presence of the iron core in proximity to the plasma changes the magnetic topology w ...

2018

RF sheath modeling of experimentally observed plasma surface interactions with the JET ITER-Like Antenna

Olivier Sauter, Richard Pitts, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Yves Martin, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, Davide Galassi, Antonio José Pereira de Figueiredo, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Jonathan Graves, Federico Nespoli, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin

Waves in the Ion Cyclotron Range of Frequencies (ICRF) enhance local Plasma-Surface Interactions (PSI) near the wave launchers and magnetically-connected objects via Radio-Frequency (RF) sheath rectification. ITER will use 20MW of ICRF power over long puls ...

Elsevier2019

Measuring fast ions in fusion plasmas with neutron diagnostics at JET

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill

Fast ions in fusion plasmas often leave characteristic signatures in the neutron emission from the plasma. In this paper, we show how neutron measurements can be used to study fast ions and give examples of physics results obtained on present day tokamaks. ...

2019

Analysis of deposited layers with deuterium and impurity elements on samples from the divertor of JET with ITER-like wall

Olivier Sauter, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Patrick Blanchard, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Robin Humphry-Baker, Sun Hee Kim, Alessandro Pau, Davide Galassi, Jonathan Marc Philippe Faustin, Liang Yao, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Vlad Trifa, Federico Nespoli, Hamish William Patten, Fernando Cortes Salazar, Samuel Lanthaler, David Pfefferlé, João Saraiva Esteves Pacheco de Almeida, Albano António De Abreu E Presa De Castro E Sousa, Alexis Gérald Page, Janir Nuno Ramos Antunes Da Cruz, Nicola Vianello, Cristian Sommariva, Andrea Brett Gasser, Tao Xu, Thomas Willem Jan de Geus, Paulo Giovane Paschoali Pereira Puglia, Mario Joe Lehmann, Jose Vicente Sanchez Mut, Joao André Gomes de Sá e Sousa, Semin Kwak, Jose Felix Vega Stavro, Lorenzo Anton-Louis Talà, Pamela Solange Valdés Undurraga, Wei Zhang, Lenke Horváth, Matthew Brown, Luca Carraro, Andrea Salmi, Raffaele Tito D'Agnolo, Hugo Antoine Georges Arnichand, Wei Tang, Luis David Figueiredo Mascarenhas Moreira Pedrosa, Philippe Janson, Lyne Moser, Stéphanie Prior, Michael Oliver Reinke, Stefano Mattei, Daniel Molina Romero, Riccardo Vannucci, Candice Megan T Young, Magalie Diane Bassan, Petre Alexandru Arion, Justin Robert Young, Isabel Marie-Rose Pilar Casado Harrington, Gil Corbaz, Hugo Augusto Penedones Fernandes, Philippe Jean Buchs, Alejandro Santa Cruz Paz

Inconel-600 blocks and stainless steel covers for quartz microbalance crystals from remote corners in the JET-ILW divertor were studied with time-of-flight elastic recoil detection analysis and nuclear reaction analysis to obtain information about the area ...

2019

14 MeV calibration of JET neutron detectors-phase 2: in-vessel calibration

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill

A new DT campaign (DTE2) is planned at JET in 2020 to minimize the risks of ITER operations. In view of DT operations, a calibration of the JET neutron monitors at 14 MeV neutron energy has been performed using a well calibrated 14 MeV neutron generator (N ...

IOP Publishing Ltd2018

The effect of beryllium oxide on retention in JET ITER-like wall tiles

Olivier Sauter, Richard Pitts, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Yves Martin, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, Patrick Blanchard, Alessandro Pau, Davide Galassi, Antonio José Pereira de Figueiredo, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Bruno Emanuel Ferreira De Sousa Correia, Jonathan Graves, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin

Preliminary results investigating the microstructure, bonding and effect of beryllium oxide formation on retention in the JET ITER-like wall beryllium tiles, are presented. The tiles have been investigated by several techniques: Scanning Electron Microscop ...

Elsevier2019

Development and validation of a tokamak skin effect transformer model

Stefano Coda, Jean-Marc Moret, 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

ERO modeling and sensitivity analysis of locally enhanced beryllium erosion by magnetically connected antennas

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill

Experiments at JET showed locally enhanced, asymmetric beryllium (Be) erosion at outer wall limiters when magnetically connected ICRH antennas were in operation. A first modeling effort using the 3D erosion and scrape-off layer impurity transport modeling ...

IOP Publishing Ltd2018

High-resolution tungsten spectroscopy relevant to the diagnostic of high-temperature tokamak plasmas

Olivier Sauter, Richard Pitts, Ambrogio Fasoli, Stefano Coda, Yves Martin, Basil Duval, Henri Weisen, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Nicola Vianello, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, Davide Galassi, Antonio José Pereira de Figueiredo, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Jonathan Graves, Federico Nespoli, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin, Yang Zou

The x-ray transitions in Cu- and Ni-like tungsten ions in the 5.19-5.26 angstrom wavelength range that are relevant as a high-temperature tokamak diagnostic, in particular for JET in the ITER-like wall configuration, have been studied. Tungsten spectra wer ...

2018

W transport and accumulation control in the termination phase of JET H-mode discharges and implications for ITER

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill

Tokamak operation with W PFCs is associated with specific challenges for impurity control, which may be particularly demanding in the transition from stationary H-mode to L-mode. To address W control issues in this phase, dedicated experiments have been pe ...

2018

Recent ASDEX Upgrade research in support of ITER and DEMO

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Alessandro Pau, Federico Alberto Alfredo Felici, Laurie Porte, Haomin Sun, Yann Camenen, Marco Wischmeier, Nicola Vianello, Alberto Bottino, Emiliano Fable, Andrea Scarabosio, Doohyun Kim, Dávid Wágner, Thomas Binderup Jensen

Recent experiments on the ASDEX Upgrade tokamak aim at improving the physics base for ITER and DEMO to aid the machine design and prepare efficient operation. Type I edge localized mode (ELM) mitigation using resonant magnetic perturbations (RMPs) has been ...

Iop Publishing Ltd2015

Improved Plasma Vertical Position Control on TCV Using Model-Based Optimized Controller Synthesis

Stefano Coda, Federico Alberto Alfredo Felici, Cristian Galperti, Federico Pesamosca

Elongated plasmas lead to improved performance in tokamaks but make the plasma prone to vertical instability, which requires active feedback control, a critical issue for future fusion reactors. Vertical control was optimized for the TCV tokamak by applyin ...

2022

Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade

Olivier Sauter, Basil Duval, Richard Pitts, Timothy Goodman, Stefano Coda, Yann Camenen, Marco Wischmeier, Nicola Vianello, Federico Alberto Alfredo Felici, Cristian Sommariva, Laurie Porte, Alberto Bottino, Emiliano Fable, Antoine Pierre Emmanuel Alexis Merle, Andrea Scarabosio, Doohyun Kim, Haomin Sun, Dávid Wágner, Thomas Binderup Jensen

Ammonia formation was studied in a series of dedicated nitrogen seeded H-mode discharges at ASDEX Upgrade. The evolution of ammonia formation was investigated with a reference phase before the seeding, and a long, stable flat-top nitrogen-seeded phase. It ...

IOP Publishing Ltd2019

Benign termination of runaway electron beams on ASDEX Upgrade and TCV

Stefano Coda, Basil Duval, Joan Decker, Umar Sheikh, Claudia Colandrea, Luke Simons, Jean Arthur Cazabonne

This paper discusses the development of a benign termination scenario for runaway electron (RE) beams on ASDEX Upgrade and TCV. A systematic study revealed that a low electron density (n e) companion plasma was required to achieve a large MHD instability, ...

Iop Publishing Ltd2024

Dependence of the L-Mode scrape-off layer power fall-off length on the upper triangularity in TCV

Stefano Coda, Benoît Labit, Holger Reimerdes, Christian Gabriel Theiler, Antoine Pierre Emmanuel Alexis Merle, Roberto Maurizio

This paper reports on experimental observations on TCV with a scan in upper triangularity

{\delta }_{\mathrm{up}}

, including negative triangularity, focusing on the power fall-off length

{\lambda }_{{\rm{q}}}

in L-Mode. The upper triangularity is scann ...

2018

A Variable Structure Control Scheme Proposal for the Tokamak a Configuration Variable

Olivier Sauter, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Timothy Goodman, Yves Martin, Yann Camenen, Jan Horacek, Duccio Testa, Marco Wischmeier, Jean-Marc Moret, Ivo Furno, Nicola Vianello, Minh Quang Tran, Patrick Blanchard, Alessandro Pau, Federico Alberto Alfredo Felici, Benoît Labit, Paolo Ricci, Jean-Philippe Hogge, Jonathan Graves, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Alexander Karpushov, Cedric Kar-Wai Tsui, Federico Nespoli, Kevin Henricus Annemarie Verhaegh, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Wouter Vijvers, Xavier Llobet, Christian Schlatter, Yanis Andrebe, Cristian Galperti, Joan Decker, Zhouji Huang, Fabio Riva, Mengdi Kong, Rémy Jacquier, Anna Teplukhina, Roberto Maurizio, Oulfa Chellaï, Francesco Carpanese, Falk Hans Braunmüller, Claudio Marini, Himank Anand, Dahye Choi, Hoang Bao Le, Josef Kamleitner, Joyeeta Sinha, Anton Malygin, Mélanie Preynas, Joshua Nathaniel Hawke

Fusion power is the most significant prospects in the long-term future of energy in the sense that it composes a potentially clean, cheap, and unlimited power source that would substitute the widespread traditional nonrenewable energies, reducing the geogr ...

2019

Fast H isotope and impurity mixing in ion-temperature-gradient turbulence

Olivier Sauter, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, Miguel Fernández Ruiz, Nicola Vianello, Robin Humphry-Baker, Sun Hee Kim, Federico Nespoli, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, Yann Camenen, Bruno Emanuel Ferreira De Sousa Correia, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Marco Wischmeier, Dalziel Joseph Wilson, Liang Yao, Daniel Scott Alessi, Arnout Lodewijk M Beckers, Ana Francisca Leal Silva Soares, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Partha Dutta, Pierre-Thomas Paul Brun, Pedro Camilo de Oliveira e Silva, Alberto Hernando de Castro, Julio Rodriguez, Vlad Trifa, Li Shuai, Rebecca Hill, Michele Marin

In ion-temperature-gradient (ITG) driven turbulence, the resonance condition leads to ion particle turbulent transport coefficients significantly larger than electron particle turbulent transport coefficients. This is shown in nonlinear gyrokinetic simulat ...

IOP Publishing Ltd2018

Modelling of tungsten erosion and deposition in the divertor of JET-ILW in comparison to experimental findings

Olivier Sauter, Basil Duval, Henri Weisen, Richard Pitts, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Yves Martin, Patrick Blanchard, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Sun Hee Kim, Mikhail Maslov, Federico Nespoli, Alessandro Pau, David Pfefferlé, Davide Galassi, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Daniel Scott Alessi, Alberto Hernando de Castro, Julio Rodriguez

The erosion, transport and deposition of tungsten in the outer divertor of JET-ILW has been studied for an H-Mode discharge with low frequency ELMs. For this specific case with an inter-ELM electron temperature at the strike point of about 20 eV, tungsten ...

Elsevier2019

EDGE2D-EIRENE simulations of the influence of isotope effects and anomalous transport coefficients on near scrape-off layer radial electric field

Olivier Sauter, Basil Duval, Henri Weisen, Martinus Adela Maria Gijs, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Patrick Blanchard, Richard Pitts, Yves Martin, Yann Camenen, Javier García Hernández, Duccio Testa, Marco Wischmeier, Miguel Fernández Ruiz, Nicola Vianello, Sun Hee Kim, Federico Nespoli, Alessandro Pau, David Pfefferlé, Davide Galassi, Jonathan Marc Philippe Faustin, Dalziel Joseph Wilson, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, Jan Horacek, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Liang Yao, Daniel Scott Alessi, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Alberto Hernando de Castro, Julio Rodriguez, Li Shuai, Rebecca Hill

EDGE2D-EIRENE (the 'code') simulations show that radial electric field, Er, in the near scrape-off layer (SOL) of tokamaks can have large variations leading to a strong local E x B shear greatly exceeding that in the core region. This was pointed out in si ...

2019

Sliding Surface Based Schemes for the Tokamak a Configuration Variable

Olivier Sauter, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Timothy Goodman, Yves Martin, Stefano Alberti, Yann Camenen, Jan Horacek, Duccio Testa, Marco Wischmeier, Jean-Marc Moret, Ivo Furno, Minh Quang Tran, Patrick Blanchard, Alessandro Pau, Federico Alberto Alfredo Felici, Benoît Labit, Paolo Ricci, Jean-Philippe Hogge, Jonathan Graves, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Alexander Karpushov, Bernard Schneider, Federico Nespoli, Kevin Henricus Annemarie Verhaegh, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Wouter Vijvers, Xavier Llobet, Christian Schlatter, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Joan Decker, Cedric Kar-Wai Tsui, Fabio Riva, Mengdi Kong, Nicola Vianello, Rémy Jacquier, Pedro Andres Molina Cabrera, Anna Teplukhina, Zhouji Huang, Roberto Maurizio, Oulfa Chellaï, Francesco Carpanese, Falk Hans Braunmüller, Claudio Marini, Himank Anand, Dahye Choi, Hoang Bao Le, Josef Kamleitner, Miguel Filipe Silva Füglister, Joyeeta Sinha, Anton Malygin, Mélanie Preynas, Joshua Nathaniel Hawke

Fusion power may be seen as the energy of the future in the sense that it composes a potentially clean, cheap and unlimited power source that would reduce the worldwide dependency on non-renewable energies. Nevertheless, while nowadays the fusion reaction ...

IEEE2018