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Timothy Goodman

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Publications associées (188)

Assessment of the ITER EC Upper Launcher Performance

Timothy Goodman, Olivier Sauter, Emanuele Poli

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

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

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

On recent results in the modelling of neoclassical-tearing-mode stabilization via electron cyclotron current drive and their impact on the design of the upper EC launcher for ITER

Timothy Goodman, Olivier Sauter, Hartmut Zohm, Emanuele Poli

Electron cyclotron wave beams injected from a launcher placed in the upper part of the vessel will be used in ITER to control MHD instabilities, in particular neoclassical tearing modes (NTMs). Simplified NTM stabilization criteria have been used in the pa ...

IOP Publishing Ltd2015

High density experiments in TCV ohmically heated and L-mode plasmas

Roland Behn, Basil Duval, Timothy Goodman, Antoine Pochelon, Olivier Sauter, Stefano Coda, Alexander Karpushov, Laurie Porte, Benoît Labit

Recent experiments have been performed on the Tokamak a configuration variable (TCV) to investigate the confinement properties of high density plasmas and the mechanism behind the density limit. In a limiter configuration with plasma elongation kappa = 1.3 ...

Iop Publishing Ltd2015

Progress of the ECRH Upper Launcher design for ITER

René Chavan, Timothy Goodman, Olivier Sauter, Jean-Daniel Landis, Francisco Sanchez, Emanuele Poli

The design of the ITER ECRH system provides 20 MW millimeter wave power for central plasma heating and MHD stabilization. The system consists of an array of 24 gyrotrons with power supplies coupled to a set of transmission lines guiding the beams to the fo ...

Elsevier Science Sa2014

On the non-stiffness of edge transport in L-mode tokamak plasmas

Stephan Brunner, Roland Behn, Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Alexander Karpushov, Yann Camenen, Lucia Isabel Federspiel, Doohyun Kim, Gabriele Merlo, Antoine Pierre Emmanuel Alexis Merle, Donghyun Kim

Transport analyses using first-principle turbulence codes and 11/2-D transport codes usually study radial transport properties between the tokamak plasma magnetic axis and a normalized minor radius around 0.8. In this region, heat transport shows significa ...

Amer Inst Physics2014

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

René Chavan, Timothy Goodman

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

Real-time sawtooth control and NTM preemption in ITER

Timothy Goodman, Olivier Sauter, Doohyun Kim, Donghyun 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

Optimization of the ITER EC&H and CD functional capabilities while relaxing the engineering constraints

Timothy Goodman, Emanuele Poli

2014

Preliminary design of the ITER ECH Upper Launcher

René Chavan, Timothy Goodman, Olivier Sauter, Jean-Daniel Landis, Hartmut Zohm, Francisco Sanchez, Emanuele Poli

The design of the ITER electron cyclotron launchers recently reached the preliminary design level - the last major milestone before design finalization. The ITER ECH system contains 24 installed gyrotrons providing a maximum ECH injected power of 20 MW thr ...

Elsevier Science Sa2013

Development of real-time plasma analysis and control algorithms for the TCV tokamak using SIMULINK

Basil Duval, Timothy Goodman, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Lucia Isabel Federspiel, Alessandro Bortolon, Andreas Pitzschke, James Paley, Francesco Piras, Federico Alberto Alfredo Felici, Wouter Vijvers, Hoang Bao Le

One of the key features of the new digital plasma control system installed on the TCV tokamak is the possibility to rapidly design, test and deploy real-time algorithms. With this flexibility the new control system has been used for a large number of new e ...

Elsevier2013

Fast seeding of NTMs by sawtooth crashes in TCV and their preemption using ECRH

Basil Duval, Timothy Goodman, Antoine Pochelon, Olivier Sauter, Holger Reimerdes, Jonathan Graves, Duccio Testa

Many tokamaks have observed that sawteeth of sufficient duration may trigger neoclassical tearing modes (NTMs) that lead to plasma performance degradation. In this paper, TCV's ability to accurately control the period of individual sawteeth is exploited, u ...

IOP Publishing Ltd2013

Real-time control of the period of individual ELMs by EC power on TCV

Basil Duval, Timothy Goodman, Yves Martin, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Jonathan Rossel, Federico Alberto Alfredo Felici

The period of individual type-I edge-localized modes (ELMs) in TCV H-mode plasmas is controlled by real-time controlled application of electron cyclotron (EC) power close to the plasma pedestal. An ELM pacing algorithm, closely related to sawtooth pacing [ ...

IOP Publishing Ltd2013

Power requirements for electron cyclotron current drive and ion cyclotron resonance heating for sawtooth control in ITER

Timothy Goodman, Olivier Sauter, Stefano Coda, Martin Jucker, Jonathan Graves, Costanza Zucca, Otto Asunta

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

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

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

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

Demonstration of sawtooth period locking with power modulation in TCV plasmas

Timothy Goodman, Olivier Sauter, 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

Edge-localized mode control by electron cyclotron waves in a tokamak plasma

Timothy Goodman, Yves Martin, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Jonathan Rossel, Duccio Testa, Federico Alberto Alfredo Felici

Electron cyclotron resonance heating is applied to the edge of a high-confinement (H-mode) plasma featuring type I edge-localized modes (ELMs) in the TCV tokamak. As the deposition location is shifted gradually in a highly controlled manner towards the pla ...

IOP Publishing Ltd2012

Dependence of L-mode confinement on the electron cyclotron power deposition profile in the TCV tokamak

Roland Behn, Basil Duval, Timothy Goodman, Antoine Pochelon, Olivier Sauter, Stefano Coda, Alexander Karpushov, Loïc Curchod, Benoît Labit, Mikael Rancic

Institute of Physics2012

Recent TCV results – innovative plasma shaping to improve plasma properties and insight

Stephan Brunner, Basil Duval, Timothy Goodman, Jean-Marc Moret, Antoine Pochelon, Olivier Sauter, Laurent Villard, Holger Reimerdes, Stefano Coda, Alberto Bottino, Sébastien Jolliet, Jonathan Rossel, Alexander Karpushov, Laurie Porte, Paolo Angelino, Benoît Labit, Alessandro Marinoni, Mikael Rancic, Andreas Pitzschke, Dávid Wágner, David Nicholas Wagner

2012

3rd harmonic ECRH absorption enhancement by 2nd harmonic heating at the same frequency in a tokamak

Timothy Goodman, Stefano Coda, Silvano Gnesin, Joan Decker

The fundamental mechanisms responsible for the interplay and synergy between the absorption dynamics of extraordinary-mode electron cyclotron waves at two different harmonic resonances (the 2nd and 3rd) are investigated in the TCV tokamak. An enhanced 3rd ...

2012

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