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Davide Galassi

Cette personne a quitté l’EPFL

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Publications associées (175)

Page 3 sur 9

Determination of 2D poloidal maps of the intrinsic W density for transport studies in JET-ILW

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

The experimental method developed at ASDEX Upgrade for the determination of the intrinsic tungsten (W) density profile coupling data from the soft X-ray (SXR) diagnostic and vacuum-ultra-violet (VUV) spectroscopy has been upgraded for application to JET pl ...

2018

Neutron spectroscopy measurements of 14 MeV neutrons at unprecedented energy resolution and implications for deuterium-tritium fusion plasma diagnostics

Olivier Sauter, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Basil Duval, Henri Weisen, Patrick Blanchard, Richard Pitts, Yves Martin, Javier García Hernández, Duccio Testa, 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, Jonnathan Cesar Hidalgo Acosta, Antonio José Pereira de Figueiredo, Vlad Trifa, Federico Nespoli, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Albano António De Abreu E Presa De Castro E Sousa, Alexis Gérald Page, Janir Nuno Ramos Antunes Da Cruz, Nicola Vianello, Cristian Sommariva, 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, Jose Felix Vega Stavro, Lorenzo Anton-Louis Talà, Pamela Solange Valdés Undurraga, Wei Zhang, Lenke Horváth, Matthew Brown, Hugo Antoine Georges Arnichand, Wei Tang, Luis David Figueiredo Mascarenhas Moreira Pedrosa, Philippe Janson, Lyne Moser, Stéphanie Prior, Stefano Mattei, Daniel Molina Romero, Riccardo Vannucci, Candice Megan T Young, Petre Alexandru Arion, Justin Robert Young, Gil Corbaz, Hugo Augusto Penedones Fernandes, Philippe Jean Buchs, Alejandro Santa Cruz Paz

An accurate calibration of the JET neutron diagnostics with a 14 MeV neutron generator was performed in the first half of 2017 in order to provide a reliable measurement of the fusion power during the next JET deuterium-tritium (DT) campaign. In order to m ...

IOP Publishing2018

Validation of SOLPS-ITER simulations against the TCV-X21 reference case

Holger Reimerdes, Christian Gabriel Theiler, Davide Galassi, Claudia Colandrea, Lorenzo Martinelli, Diego Sales de Oliveira, Ming Yin Kenneth Lee

This paper presents a quantitative validation of Scrape-Off Layer Plasma Simulation-ITER (SOLPS-ITER) simulations against the TCV-X21 reference case and provides insights into the neutral dynamics and ionization source distribution in this scenario. TCV-X2 ...

IOP Publishing Ltd2024

High Z neoclassical transport: Application and limitation of analytical formulae for modelling JET experimental parameters

Heavy impurities, such as tungsten (W), can exhibit strongly poloidally asymmetric density profiles in rotating or radio frequency heated plasmas. In the metallic environment of JET, the poloidal asymmetry of tungsten enhances its neoclassical transport up ...

2018

Tokamak Edge Plasma Turbulence Interaction with Magnetic X-Point in 3D Global Simulations

Davide Galassi

Turbulence in the edge plasma of a tokamak is a key actor in the determination of the confinement properties. The divertor configuration seems to be beneficial for confinement, suggesting an effect on turbulence of the particular magnetic geometry introduc ...

2019

A control oriented strategy of disruption prediction to avoid the configuration collapse of tokamak reactors

Olivier Sauter, Ambrogio Fasoli, Henri Weisen, Duccio Testa, Patrick Blanchard, Federico Alberto Alfredo Felici, Umar Sheikh, Alessandro Pau, Davide Galassi, Cristian Sommariva, Paulo Giovane Paschoali Pereira Puglia, Mike Machielsen, Gino Marceca, Eduardo José Lascas Neto

The objective of thermonuclear fusion consists of producing electricity from the coalescence of light nuclei in high temperature plasmas. The most promising route to fusion envisages the confinement of such plasmas with magnetic fields, whose most studied ...

Nature Research2024

The GBS code for the self-consistent simulation of plasma turbulence and kinetic neutral dynamics in the tokamak boundary

Nicola Varini, Paolo Ricci, Davide Galassi, Emmanuel Lanti, Nicolas Richart, Maurizio Giacomin, Gilles Fourestey, Davide Mancini, Louis Nicolas Stenger, André Calado Coroado

A new version of GBS (Ricci et al. (2012) [27]; Halpern et al. J. Comput. Phys. 315 (2016) 388-408; Paruta et al. (2018) [11]) is described. GBS is a three-dimensional, fluxdriven, global, two-fluid turbulence code developed for the self-consistent simulat ...

2022

Analysis of plasma termination in the JET hybrid scenario

Olivier Sauter, Richard Pitts, Jonathan Graves, Ambrogio Fasoli, Stefano Coda, Yves Martin, Basil Duval, Henri Weisen, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, 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, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Hamish William Patten, Samuel Lanthaler, José Pedro Rebelo Ferreira Marques, Mikhail Maslov, Daniel Scott Alessi, 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, Rebecca Hill

This paper analyses the final phase of hybrid scenario discharges at JET, the reduction of auxiliary heating towards finally the Ohmic phase. The here considered Ohmic phase is mostly still in the current flattop but may also be in the current ramp down. F ...

IOP Publishing Ltd2018

Role of fast ion pressure in the isotope effect in JET L-mode plasmas

Yiming Li, Olivier Sauter, Richard Pitts, Ambrogio Fasoli, Basil Duval, Henri Weisen, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, Davide Galassi, Federico Alberto Alfredo Felici, Antonio José Pereira de Figueiredo, Cristian Sommariva, Jonathan Graves, Emiliano Fable, Francesca Maria Poli, Antoine Pierre Emmanuel Alexis Merle, Federico Nespoli, Daniele Brunetti, Anna Teplukhina, Hamish William Patten, Samuel Lanthaler, Haomin Sun, Alberto Mariani, Michele Marin

This paper presents results of JET ITER-like wall L-mode experiments in hydrogen and deuterium (D) plasmas, dedicated to the study of the isotope dependence of ion heat transport by determination of the ion critical gradient and stiffness by varying the io ...

IOP Publishing Ltd2019

Test particles dynamics in the JOREK 3D non-linear MHD code and application to electron transport in a disruption simulation

In order to contribute to the understanding of runaway electron generation mechanisms during tokamak disruptions, a test particle tracker is introduced in the JOREK 3D non-linear MHD code, able to compute both full and guiding center relativistic orbits. T ...

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

Determination of isotope ratio in the divertor of JET-ILW by high-resolution H alpha spectroscopy: H-D experiment and implications for D-T experiment

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Richard Pitts, Stefano Coda, Yves Martin, Henri Weisen, Patrick Blanchard, Yann Camenen, Jan Horacek, Javier García Hernández, Duccio Testa, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, 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, Stéphanie Prior

The data of the H alpha high-resolution spectroscopy, collected on the multiple lines of sight, which cover the entire divertor space in poloidal cross-section, during the recent hydrogen-deuterium experiments in JET-ILW (ITER-like wall), are processed. A ...

IOP Publishing Ltd2019

Experimental validation of an analytical kinetic model for edge-localized modes in JET-ITER-like wall

The design and operation of future fusion devices relying on H-mode plasmas requires reliable modelling of edge-localized modes (ELMs) for precise prediction of divertor target conditions. An extensive experimental validation of simple analytical predictio ...

IOP Publishing Ltd2018

Modification of the Alfven wave spectrum by pellet injection

Alfven eigenmodes driven by energetic particles are routinely observed in tokamak plasmas. These modes consist of poloidal harmonics of shear Alfven waves coupled by inhomogeneity in the magnetic field. Further coupling is introduced by 3D inhomogeneities ...

IOP Publishing Ltd2019

A wall-aligned grid generator for non-linear simulations of MHD instabilities in tokamak plasmas

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, Patrick Blanchard, Alessandro Pau, Davide Galassi, Antonio José Pereira de Figueiredo, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Jonathan Graves, Mikhail Maslov, Federico Nespoli, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin

Block-structured mesh generation techniques have been well addressed in the CFD community for automobile and aerospace studies, and their applicability to magnetic fusion is highly relevant, due to the complexity of the plasma-facing wall structures inside ...

ELSEVIER2019

Activation Inventories After Exposure To Dd/Dt Neutrons In Safety Analysis Of Nuclear Fusion Installations

Irradiations with 14 MeV fusion neutrons are planned at Joint European Torus (JET) in DT operations with the objective to validate the calculation of the activation of structural materials in functional materials expected in ITER and fusion plants. This st ...

2018

Population modelling of the He II energy levels in tokamak plasmas: I. Collisional excitation model

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

Helium is widely used as a fuel or minority gas in laboratory fusion experiments, and will be present as ash in DT thermonuclear plasmas. It is therefore essential to have a good understanding of its atomic physics. To this end He II population modelling h ...

IOP Publishing2019

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

Parallel convection and E × B drifts in the TCV snowflake divertor and their effects on target heat-fluxes

Basil Duval, Davide Galassi, Holger Reimerdes, Joaquim Loizu Cisquella, Cedric Kar-Wai Tsui, Mirko Wensing, Roberto Maurizio

Parallel convection and E × B drifts act together to redistribute heat between the strike-points mechanisms is enhanced near the secondary X-point and is shown to dominate over heat in the low field side snowflake minus (LFS SF−). The cumulative heat conve ...

IOP Publishing Ltd2021

Generation of a plasma neutron source for Monte Carlo neutron transport calculations in the tokamak JET

The connection between plasma physics and neutronics is crucial for the understanding of the operation and performance of modern and future tokamak devices. Neutrons are one of the primary carriers of information on the plasma state and represent the basis ...

2018