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Timothy Goodman

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Publications associées (178)

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Current profile tailoring using localized electron cyclotron heating in highly elongated TCV plasmas

Olivier Sauter, Stefano Coda, Timothy Goodman, Stefano Alberti, Antoine Pochelon, Patrick Blanchard, Yann Camenen, Laurie Porte, Andrea Scarabosio, Gilles Arnoux

Radially localized electron cyclotron heating (ECH) at the 2nd harmonic (X2) is used to tailor the current profile through the modification of the temperature, and hence conductivity, profiles. The optimal conditions for current profile broadening are inve ...

IOP Publishing Ltd2007

ITER ECH&CD Upper Launcher: Design options and Remote Handling issues of the waveguide assembly

Timothy Goodman, René Chavan

The ITER Electron Cyclotron Heating and Current Drive Upper Launcher, developed by the ECHUL-CA Consortium of Euratom Associations (CRPP, CNR, ITER-NL, IPF, IPP, KIT and Politecnico di Milano), is presently in its final design phase. The study presented he ...

Elsevier Science Sa2014

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

Operations with Spherical Calorimetric Loads in Different Configurations at Gyrotron Test Stands at EPFL and QST

Timothy Goodman, Stefano Alberti, Jean-Philippe Hogge, Damien Fasel, Miguel Filipe Silva Füglister

A research activity in the Institute for Plasma Science and Technology of National Research Council (ISTP-CNR, Italy, former IFP-CNR) and in L.T. Calcoli (LTC, Italy) is aimed at the design and construction of calorimetric loads for absorption and measurem ...

AMER INST PHYSICS2020

Real-time physics-model-based simulation of the current density profile in tokamak plasmas

Olivier Sauter, Stefano Coda, Basil Duval, Timothy Goodman, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley

A new paradigm is presented to reconstruct the plasma current density profile in a tokamak in real-time. The traditional method of basing the reconstruction on real-time diagnostics combined with a real-time Grad-Shafranov solver suffers from the difficult ...

IOP Publishing Ltd2011

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

Selected highlights of ECH/ECCD physics studies in the TCV tokamak

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, Joan Decker, Doohyun Kim

The Tokamak a Configuration Variable, TCV, has used Electron Cyclotron Heating and Current Drive as its only auxiliary heating system for nearly two decades. In addition to basic plasma heating and current profiling, ECH and ECCD under either feedforward o ...

EDP Sciences2015

Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Duccio Testa, Patrick Blanchard, Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Alessandro Pau, Federico Alberto Alfredo Felici, Cristian Sommariva, Laurie Porte, Alexander Karpushov, Marc Gruber, Antoine Pierre Emmanuel Alexis Merle, Joan Decker, Umar Sheikh, Cristian Galperti, Yanis Andrebe, Richard Pitts, Yann Camenen, Jan Horacek, Roland Behn, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Federico Nespoli, Antonio José Pereira de Figueiredo, Emiliano Fable, Ben McMillan, Cedric Kar-Wai Tsui, Doohyun Kim, Kevin Henricus Annemarie Verhaegh, Wouter Vijvers, Anna Teplukhina, Zhouji Huang, Dávid Wágner, Claudio Marini, Thomas Binderup Jensen, Hoang Bao Le, Himank Anand, Attila Bencze

Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat and particle loads on the wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research on ASDEX Upgrade ...

IOP Publishing Ltd2017

Present design of the Steering Mirror Assembly (SMA) for ITER ECHUL

Timothy Goodman, René Chavan, Anastasia Xydou

In the ITER Tokamak, four Electron Cyclotron Heating Upper Launchers (ECHUL) are needed to control plasma instabilities at the rational surfaces, most importantly the q = 3/2 and q = 2/1 neoclassical tearing modes (NTMs). Each ECHUL is equipped with a set ...

2023

Conceptual design of a modular EC heating system for EU-DEMO

Timothy Goodman, Jean-Philippe Hogge, René Chavan, Anastasia Xydou, Cinta Lucia Marraco Borderas, Daniel Birlan, Marc Noël, Fabien Pierre Crisinel, Arnaud Clément

The European DEMO (EU-DEMO) reactor studies within EUROfusion aim to develop a fusion power plant concept. The large tokamak device needs an auxiliary heating power which, at the present stage, is provided by the Electron Cyclotron (EC) heating system with ...

IOP Publishing Ltd2024

Real-time sawtooth control and NTM preemption in ITER

Olivier Sauter, Timothy Goodman, Doohyun Kim

Real-time control of multiple plasma actuators is a requirement in advanced tokamaks; for example, for burn control, plasma current profile control and MHD stabilization electron cyclotron (EC) wave absorption is ideally suited especially for the latter. O ...

American Institute of Physics (AIP)2014

Status of the ITER Electron Cyclotron Heating and Current Drive System

Timothy Goodman

The electron cyclotron (EC) heating and current drive (H&CD) system developed for the ITER is made of 12 sets of high-voltage power supplies feeding 24 gyrotrons connected through 24 transmission lines (TL), to five launchers, four located in upper ports a ...

Springer2016

Electron heat transport in shaped TCV L-mode plasmas

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Roland Behn, Yann Camenen, Laurie Porte, Alexander Karpushov, Alberto Bottino

Electron heat transport experiments are performed in L-mode discharges at various plasma triangularities, using radially localized electron cyclotron heating to vary independently both the electron temperature T-e and the normalized electron temperature gr ...

2005

Experimental characterization of the TCV dual-frequency gyrotron and validation of numerical codes including the effect of After Cavity Interaction

Timothy Goodman, Stefano Alberti, Jean-Philippe Hogge, Damien Fasel, Jérémy Genoud, Ugo Siravo, Jérémie Dubray, Matthieu Toussaint, Falk Hans Braunmüller, François Jean Gaston Legrand

A dual-frequency gyrotron has been developed within the context of the recent Tokamak à Configuration Variable (TCV) upgrade. The gyrotron is designed to generate a 1 MW, 2 seconds RF wave at 84 or 126 GHz. Before integrating the gyrotrons in the TCV tokam ...

2024

Overview of physics studies on ASDEX Upgrade

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

The ASDEX Upgrade (AUG) programme, jointly run with the EUROfusion MST1 task force, continues to significantly enhance the physics base of ITER and DEMO. Here, the full tungsten wall is a key asset for extrapolating to future devices. The high overall heat ...

IOP Publishing Ltd2019

Overview of the EUROfusion Tokamak Exploitation programme in support of ITER and DEMO

Pacôme Henryk Cécil Devleeshouver, Olivier Sauter, Stefano Coda, Basil Duval, Henri Weisen, Timothy Goodman, Duccio Testa, Jean-Marc Moret, Patrick Blanchard, Benoît Labit, Holger Reimerdes, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Simon Van Mulders, Alessandro Pau, Cristian Galperti, Joan Decker, Marcelo Baquero Ruiz, Cedric Kar-Wai Tsui, Mengdi Kong, Matteo Vallar, Olivier Claude Martin Février, Davide Galassi, Guang-Yu Sun, Filippo Bagnato, Paulo Giovane Paschoali Pereira Puglia, Artur Perek, Claudia Colandrea, Sophie Danielle Angelica Gorno, Nicola Offeddu, Luke Simons, Aylwin Iantchenko, Lorenzo Martinelli, Oleg Krutkin, Dmytry Mykytchuk, Jesús Poley Sanjuán, Carl Mathias Paul Hoppe, Benjamin Alexandre Vincent, Umesh Kumar, Garance Hélène Salomé Durr-Legoupil-Nicoud, Massimo Carpita, Jean Arthur Cazabonne, Davide Mancini, Cassandre Ekta Contré, Stefano Marchioni, Samuele Mazzi, Gino Marceca, Renat Karimov, Elena Tonello, Yoeri Renier Johannes Poels, Michele Marin, Martim Zurita, Alessandro Balestri, Anton Jansen Van Vuuren, Francesco Pastore, Mackenzie Peter-Fulford Van Rossem, Emanuel Paul Huett, Nam Axel David Vu, Hari Raj, Antonia Frank, Aleksandr Listopad

Within the 9th European Framework programme, since 2021 EUROfusion is operating five tokamaks under the auspices of a single Task Force called ‘Tokamak Exploitation’. The goal is to benefit from the complementary capabilities of each machine in a coordinat ...

IOP Publishing Ltd2024

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

Simple predictive electron transport models applied to sawtoothing plasmas

Olivier Sauter, Timothy Goodman, Antoine Pierre Emmanuel Alexis Merle, Doohyun Kim

In this work, we introduce two simple transport models to evaluate the time evolution of electron temperature and density profiles during sawtooth cycles (i.e. over a sawtooth period time-scale). Since the aim of these simulations is to estimate reliable p ...

Plasma Physics and Controled Fusion2016

Real time control of the sawtooth period using EC launchers

Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, James Paley, Francesco Piras

Tokamak plasmas operating at high performance are limited by several MHD instabilities. The sawtooth instability limits the core plasma pressure and can drive the neoclassical tearing mode unstable, but also prevents accumulation of impurities in the core. ...

Plasma Phys. Control. Fusion2009

Sawtooth control experiments on ASDEX Upgrade

Timothy Goodman

In a fusion device, the so-called sawtooth instability can lead to the triggering of confinement limiting neoclassical tearing modes. On the other hand, the existence of sawteeth is desirable for the removal of one fusion product, i.e. helium ash from the ...

2005