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Timothy Goodman

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Publications associées (178)

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Electron cyclotron emission spectrometry on the Tokamak a Configuration Variable

Ambrogio Fasoli, Timothy Goodman, Stefano Alberti, Patrick Blanchard, Laurie Porte, Igor Klimanov

Electron cyclotron emission (ECE) measurements are an important component of the diagnostic suite on the Tokamak a Configuration Variable (TCV) [F. Hoffman , Plasma Phys. Controlled Fusion 36, B277 (1994)]. A recently installed, 24-channel dual-conversion ...

2005

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

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

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

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

Jérémie Gérard Laurent, Olivier Sauter, Ambrogio Fasoli, Henri Weisen, Richard Pitts, Jonathan Graves, Stefano Coda, Basil Duval, Timothy Goodman, Yves Martin, Yann Camenen, Jan Horacek, Javier García Hernández, Marco Wischmeier, Jean-Marc Moret, Mikhail Maslov, Patrick Blanchard, Alessandro Pau, David Pfefferlé, Davide Galassi, Federico Alberto Alfredo Felici, Roland Behn, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Cristian Sommariva, Benoît Labit, Hamish William Patten, Samuel Lanthaler, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Alberto Bottino, Marc Gruber, Alexander Karpushov, Emiliano Fable, Ben McMillan, Andrea Scarabosio, Federico Nespoli, Kevin Henricus Annemarie Verhaegh, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Wouter Vijvers, Matteo Fontana, Yanis Andrebe, Cristian Galperti, Haomin Sun, Joan Decker, Cedric Kar-Wai Tsui, Doohyun Kim, Nicola Vianello, Pedro Andres Molina Cabrera, Anna Teplukhina, Thomas Binderup Jensen, Zhouji Huang, Jose Vicente Sanchez Mut, Attila Bencze, Dávid Wágner, Claudio Marini, Himank Anand, Dahye Choi, Hoang Bao Le, Miguel Filipe Silva Füglister, Anton Malygin, Mélanie Preynas, Mateusz Gospodarczyk

The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different ...

2019

Demonstration of sawtooth period locking with power modulation in TCV plasmas

Olivier Sauter, Timothy Goodman, Federico Alberto Alfredo Felici

Corroborating evidence is presented that the sawtooth period can follow the modulation frequency of an externally applied high power electron cyclotron wave source. Precise, fast and robust open loop control of the sawtooth period with a continuously chang ...

IOP Publishing Ltd2012

Tests and Qualification of the European 1 MW, 170 GHz CW Gyrotron in an ITER relevant configuration at SPC

Timothy Goodman, Stefano Alberti, Jean-Philippe Hogge, Francisco Sanchez, Jérémy Genoud

After an initial testing period at the Karlsruhe Institute of Technology, the upgraded EU 1 MW, 170 GHz continuous wave (CW) industrial prototype gyrotron (TH1509U) for Electron Cyclotron Resonance Heating and Current Drive (ECRH&CD) in ITER has been trans ...

IEEE2022

Multiple EC power deposition locations tracking by break-in-slope analysis in TCV plasmas

Timothy Goodman, Antoine Pochelon, Jean-Marc Moret, Federico Alberto Alfredo Felici, Joan Decker, James Paley, Loïc Curchod

Modulation of the amplitude of externally injected electron cyclotron (EC) power is a frequent method used to determine the radial power deposition profile in fusion plasmas. There are many tools to analyze the plasma response to the power modulations unde ...

2011

Optically isolated millimeter-wave detector for the Toroidal Plasma Experiment

Anja Skrivervik, Timothy Goodman, Stefano Alberti, Ivo Furno, Gennady Plyushchev, Marcelo Baquero Ruiz, Oulfa Chellaï, Fabian Manke, Paolo Micheletti

We have designed and built an optically isolated millimeter-wave detection system to prevent interference from a nearby, powerful, 2.45 GHz microwave source in millimeter-wave propagation experiments in the TORoroidal Plasma EXperiment (TORPEX). A series o ...

2018

L-mode plasmas analyses and current ramp-up predictions for a JT-60SA hybrid scenario

Timothy Goodman, Javier García Hernández, Matteo Vallar

In this work, L-mode analyses are performed in order to assess a modeling framework for the prediction of electron cyclotron resonant heating (ECRH) -assisted current ramp-up phases for JT-60SA tokamak hybrid scenario #4-2. We compare two turbulence transp ...

IOP PUBLISHING LTD2021

Millimeter-wave beam scattering and induced broadening by plasma turbulence in the TCV tokamak

Stefano Alberti, Timothy Goodman, Ivo Furno, Paolo Ricci

The scattering of millimeter-wave beams from electron density fluctuations and the associated beam broadening are experimentally demonstrated. Using a dedicated setup, instantaneous deflection and (de-)focusing of the beam due to density blobs on the beam ...

IOP Publishing Ltd2021

Real time control of plasmas and ECRH systems on TCV

Stefano Coda, Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Federico Alberto Alfredo Felici, James Paley, Francesco Piras

Developments in the real time control hardware on Tokamak à Configuration Variable (TCV) coupled with the flexibility of plasma shaping and electron cyclotron (EC) heating and current drive actuators are opening many opportunities to perform real time expe ...

IOP Publishing Ltd2009

High-Power Testing of Guided-Wave Components for the ITER ECH Upper Launcher at the FALCON Test Facility

Timothy Goodman, René Chavan, Matteo Vagnoni

Each of the four ITER electron cyclotron heating (ECH) upper launchers (ULs) features eight transmission lines (TLs) made of guided-wave components used to inject 170-GHz microwave power into the plasma at a level of up to 1.31 MW per line, at the TL diamo ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

First experimental results from the EU 2 MW coaxial cavity ITER gyrotron prototype

Timothy Goodman, Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Laurie Porte, Damien Fasel, Ugo Siravo, Emmanuel Droz

The EU is working towards providing 2 MW, coaxial-cavity, CW, 170 GHz gyrotrons for ITER. Their design is based on results from an experimental pre-prototype tube in operation at FZK for several years, having a pulse length of several milliseconds. The fir ...

World Scientific Publ Co Inc, 687 Hartwell St, Teaneck, Nj 07666 Usa2009

The physics of electron internal transport barriers in the TCV tokamak

Olivier Sauter, Stefano Coda, Timothy Goodman, Roland Behn, Emiliano Fable, Costanza Zucca, Alessandro Marinoni

Electron internal transport barriers (elTBs) are generated in the TCV tokamak with strong electron cyclotron resonance heating in a variety of conditions, ranging from steady-state fully noninductive scenarios to stationary discharges with a finite inducti ...

International Atomic Energy Agency2007

First experimental results from the European Union 2 MW coaxial cavity ITER gyrotron prototype

Timothy Goodman, Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Laurie Porte, Damien Fasel, Philippe Marmillod, Ioannis Pagonakis, Albert Perez, Blaise Marlétaz, Ugo Siravo, Pierre Lavanchy, Emmanuel Droz

The European Union is working toward providing 2-MW, coaxial-cavity, continuous-wave (cw) 170-GHz gyrotrons for ITER. Their design is based on results,from an experimental preprototype tube having a pulse length of several milliseconds, in operation at For ...

American Nuclear Society2009

Prototype mitre bends of the ex-vessel waveguide system for the ITER upper launcher: Thermal hydraulic simulations and experiments with off-center mm-wave beams

Timothy Goodman, René Chavan, Anastasia Xydou, Matteo Vagnoni, Humberto Torreblanca Quiroz

On ITER, long pulse gyrotrons are required as a power source for electron cyclotron heating (ECH) and current drive (CD). The microwaves are guided from the gyrotrons, which are placed far from the Tokamak, into the plasma by transmission lines (TLs) and a ...

Elsevier2021

Assessment of the ITER EC Upper Launcher Performance

Olivier Sauter, Timothy Goodman

The 24 MW ITER Electron Cyclotron (EC) Heating and Current Drive (H&CD) system, operating at 170 GHz, consists of one Equatorial (EL) and four Upper Launchers (UL). The main task of the UL will be the control of Magneto-Hydrodynamic (MHD) activity such as ...

E D P Sciences2015

Overview of the TCV tokamak experimental programme

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Henri Weisen, Timothy Goodman, Yves Martin, Stefano Alberti, Duccio Testa, Jean-Marc Moret, Ivo Furno, Patrick Blanchard, Benoît Labit, Jan Horacek, Paolo Ricci, Jean-Philippe Hogge, Jonathan Graves, Stephan Brunner, Holger Reimerdes, Laurie Porte, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Alexander Karpushov, Joaquim Loizu Cisquella, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Xavier Llobet, Matteo Fontana, Simon Van Mulders, Alessandro Pau, Yanis Andrebe, Cristian Galperti, Joan Decker, Marcelo Baquero Ruiz, Cedric Kar-Wai Tsui, Mengdi Kong, Matteo Vallar, Olivier Claude Martin Février, Davide Galassi, Guang-Yu Sun, Pedro Andres Molina Cabrera, Filippo Bagnato, Roberto Maurizio, Oulfa Chellaï, Mirko Wensing, Claudia Colandrea, Curdin Tobias Wüthrich, Sophie Danielle Angelica Gorno, Francesco Carpanese, Nicola Offeddu, Aylwin Iantchenko, Maurizio Giacomin, Lorenzo Martinelli, Oleg Krutkin, Dahye Choi, Federico Pesamosca, Hugo Antoine Georges Arnichand, Dmytry Mykytchuk, Benjamin Alexandre Vincent, Umesh Kumar, Arsène Stéphane Tema Biwole, Lorenzo Stipani, Anna Ngoc Minh Trang Vu, Jean Arthur Cazabonne, Stefano Marchioni, Miguel Filipe Silva Füglister, Renat Karimov, Ajay Chandrarajan Jayalekshmi

The tokamak a configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to address critical issues in preparation for ITER and a fusion power plant. For the 2019-20 campaign its c ...

IOP Publishing Ltd2022

ELM-induced cold pulse propagation in ASDEX Upgrade

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

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the pl ...

2019

Inward thermodiffusive particle pinch in electron internal transport barriers in TCV

Olivier Sauter, Stefano Coda, Henri Weisen, Timothy Goodman, Emiliano Fable, Costanza Zucca, Alexey Zabolotskiy

Electron internal transport barriers (eITBs) are obtained in TCV with different heating and current drive schemes. They are sustained in steady-state conditions for several energy confinement and current redistribution times. In these scenarios, the densit ...

2006

Upgrade of the TCV tokamak, first phase: Neutral beam heating system

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Timothy Goodman, Yves Martin, Stefano Alberti, René Chavan, Alexander Karpushov, Damien Fasel, Matthieu Toussaint

Experiments on TCV are designed to complement the work at large integrated tokamak facilities (such as JET) to provide a stepwise approach to extrapolation to ITER and DEMO in areas where medium-size tokamaks can often exploit their experimental capabiliti ...

Elsevier Science Sa2015