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Davide Galassi

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Related publications (175)

Page 2 of 9

X-point and divertor filament dynamics from gas puff imaging on TCV

Basil Duval, Christian Gabriel Theiler, Olivier Claude Martin Février, Davide Galassi, Curdin Tobias Wüthrich, Nicola Offeddu, Diego Sales de Oliveira

A new gas puff imaging diagnostic has been installed on the TCV tokamak, providing two-dimensional insights into scrape-off-layer (SOL) turbulence dynamics above, at and below the magnetic X-point. A detailed study in L-mode, attached, lower single-null di ...

IOP Publishing Ltd2022

Parallel flows as a key component to interpret Super-X divertor experiments

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Olivier Claude Martin Février, Davide Galassi, Guang-Yu Sun, Artur Perek, Claudia Colandrea, Curdin Tobias Wüthrich, Sophie Danielle Angelica Gorno, Luke Simons, Lorenzo Martinelli, Massimo Carpita, Emanuel Paul Huett, Garance Hélène Salomé Durr-Legoupil-Nicoud

The Super-X Divertor (SXD) is an alternative divertor configuration leveraging total flux expansion at the Outer Strike Point (OSP). While the extended 2-Point Model (2PM) predicts facilitated detachment access and control in the SXD configuration, these a ...

IOP Publishing Ltd2024

14 MeV calibration of JET neutron detectors-phase 1: calibration and characterization of the neutron source

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

In view of the planned DT operations at JET, a calibration of the JET neutron monitors at 14 MeV neutron energy is needed using a 14 MeV neutron generator deployed inside the vacuum vessel by the JET remote handling system. The target accuracy of this cali ...

IOP Publishing Ltd2018

An improved model for the accurate calculation of parallel heat fluxes at the JET bulk tungsten outer divertor

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

Parallel heat flux calculations at the JET divertor have been based on the assumption that all incoming heat is due to the projection of the heat flux parallel to the magnetic line, q, plus a constant background. This simplification led to inconsistencies ...

IOP Publishing Ltd2018

Long-lived coupled peeling ballooning modes preceding ELMs on JET

In some JET discharges, type-I edge localised modes (ELMs) are preceded by a class of low-frequency oscillations (Perez et al 2004 Nucl. Fusion 44 609). While in many cases the ELM is triggered during the growth phase of this oscillation, it is also observ ...

IOP Publishing Ltd2019

Observation of enhanced ion particle transport in mixed H/D isotope plasmas on JET

Particle transport in tokamak plasmas has been intensively studied in the past, particularly in relation to density peaking and the presence of anomalous inward particle convection in L-and H-modes. While in the L-mode case the presence of the anomalous in ...

IOP Publishing Ltd2018

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

The software and hardware architecture of the real-time protection of in-vessel components in JET-ILW

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, Ana Francisca Leal Silva Soares, Pedro Camilo de Oliveira e Silva, Federico Nespoli, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin

For the first time, the JET operation in deuterium-tritium (D-T) plasma, which is scheduled to take place on JET in 2020, will be performed in the ITER mix of plasma-facing component materials. In view of the preparation of the DT campaign (DTE2), several ...

IOP Publishing Ltd2019

Assessment of the baseline scenario at q(95) similar to 3 for ITER

The International Tokamak Physics Activity topical group on integrated operational scenarios has compiled a database of stationary H-mode discharges at q(95) similar to 3 from AUG, C-Mod, DIII-D, JET and JT-60U, for both carbon wall and high-Z metal wall e ...

IOP Publishing Ltd2018

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

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

Measuring fast ions in fusion plasmas with neutron diagnostics at JET

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

Synthetic spectra of BeH, BeD and BeT for emission modeling in JET plasmas

A theoretical model for isotopologues of beryllium monohydride, BeH, BeD and BeT, A (2)Pi to X (2)Sigma(+) visible and X (2)Sigma(+) to X (2)Sigma(+) infrared rovibronic spectra is presented. The MARVEL procedure is used to compute empirical rovibronic ene ...

IOP Publishing2018

Deep neural networks for plasma tomography with applications to JET and COMPASS

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, Dalziel Joseph Wilson, 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

Convolutional neural networks (CNNs) have found applications in many image processing tasks, such as feature extraction, image classification, and object recognition. It has also been shown that the inverse of CNNs, so-called deconvolutional neural network ...

2019

Alpha heating, isotopic mass, and fast ion effects in deuterium-tritium experiments

Alpha heating experiments in the Tokamak Fusion Test Reactor (TFTR) and in the Joint European Torus (JET) 1997 DTE1 campaign arc reexamined. In TFTR supershots central electron heating of both deuterium only and deuterium-tritium supershots was dominated b ...

IOP Publishing Ltd2018

Investigation into the formation of the scrape-off layer density shoulder in JET ITER-like wall L-mode and H-mode plasmas

The low temperature boundary layer plasma (scrape-off layer or SOL) between the hot core and the surrounding vessel determines the level of power loading, erosion and implantation of material surfaces, and thus the viability of tokamak-based fusion as an e ...

IOP Publishing Ltd2018

Escaping alpha-particle monitor for burning plasmas

This paper presents a diagnostic system, gamma-ray alpha-particle monitor (GRAM), for continuous monitoring of deuterium-tritium fusion alpha-particles in the MeV energy range escaped from the plasma to the first wall. The diagnostic is based on the detect ...

IOP Publishing Ltd2018

Comparison of the structure of the plasma-facing surface and tritium accumulation in beryllium tiles from JET ILW campaigns 2011-2012 and 2013-2014

In this study, beryllium tiles from Joint European Torus (JET) vacuum vessel wall were analysed and compared regarding their position in the vacuum vessel and differences in the exploitation conditions during two campaigns of ITER-Like-Wall (ILW) in 2011-2 ...

Elsevier2019

Instrumentation for the upgrade to the JET core charge-exchange spectrometers

Charge-exchange spectroscopy on JET has become particularly challenging with the introduction of the ITER-like wall. The line intensities are weaker and contaminated by many nuisance lines. We have therefore upgraded the instrumentation to improve throughp ...

2018

Investigation of deuterium trapping and release in the JET divertor during the third ILW campaign using TDS

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, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Jonathan Graves, Antonio José Pereira de Figueiredo, Hamish William Patten, Samuel Lanthaler, David Pfefferlé, Jonathan Marc Philippe Faustin

Selected set of samples from JET ITER-Like Wall (JET-ILW) divertor tiles exposed in 2015-2016 has been analysed using Thermal Desorption Spectrometry (TDS). The deuterium (D) amounts obtained with TDS were compared with Nuclear Reaction Analysis (NRA). The ...

Elsevier2019

Assessment of the strength of kinetic effects of parallel electron transport in the SOL and divertor of JET high radiative H-mode plasmas using EDGE2D-EIRENE and KIPP codes

The kinetic code for plasma periphery (KIPP) was used to assess the importance of the kinetic effects of parallel electron transport in the scrape-off layer (SOL) and divertor of JET high radiative H-mode inter-ELM plasma conditions with the ITER-like wall ...

2018