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Timothy Goodman

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Related publications (178)

Page 2 of 9

Progress from ASDEX Upgrade experiments in preparing the physics basis of ITER operation and DEMO scenario development

Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Laurie Porte, Benoît Labit, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Cristian Sommariva, Alessandro Pau

An overview of recent results obtained at the tokamak ASDEX Upgrade (AUG) is given. A work flow for predictive profile modelling of AUG discharges was established which is able to reproduce experimental H-mode plasma profiles based on engineering parameter ...

IOP Publishing Ltd2022

Recent electron cyclotron emission results on TCV

Patrick Blanchard, Basil Duval, Timothy Goodman, Pierre-François Isoz, Xavier Llobet, Philippe Marmillod, Olivier Sauter, Henri Weisen, Stefano Coda, Christian Schlatter, Igor Klimanov, Laurie Porte, Emiliano Fable

Electron cyclotron emission (ECE) diagnostics on Tokamak a Configuration Variable (TCV) allow study of the electron temperature evolution in time with good spatial and temporal resolution at the high field side and low field side at various lines of sight. ...

2007

Electromagnetic and mechanical analyses of the ITER electron cyclotron Upper launcher steering M4 mirrors for the vertical displacement event

René Chavan, Timothy Goodman, Avelino Mas Sanchez, Phillip Miguel Santos Silva, Matteo Vagnoni

The mm-wave power exiting the eight In-Vessel waveguides inside the ITER Electron Cyclotron Upper Launcher is reflected by three fixed mirror sets and finally aimed by two independent steering mirrors to specific plasma locations. A design solution for bot ...

2020

Progress in the ITER electron cyclotron heating and current drive system design

Timothy Goodman

An electron cyclotron system is one of the four auxiliary plasma heating systems to be installed on the ITER tokamak. The ITER EC system consists of 24 gyrotrons with associated 12 high voltage power supplies, a set of evacuated transmission lines and two ...

Elsevier Science Sa2015

First measurements of oblique ECE with a real-time moveable line-of-sight on TCV

Timothy Goodman, Olivier Sauter, Christian Schlatter, Igor Klimanov

Electron cyclotron (EC) emission (ECE) radiometers viewing perpendicular to the magnetic field are common on nearly all tokamaks for measuring the electron temperature with good spatio-temporal resolution. Two such radiometers are installed on TCV, one loo ...

American Nuclear Society2008

Millimeter-wave beam scattering by edge-plasma density fluctuations in TCV

Stefano Alberti, Timothy Goodman, Ivo Furno, Benoît Labit, Paolo Ricci, Fabio Riva, Oulfa Chellaï, Marcelo Baquero Ruiz

In magnetically confined fusion devices, the use of millimeter waves (mmw) at the electron cyclotron (EC) frequencies ranges from plasma diagnostics to plasma heating, current drive and core confinement preservation. For large tokamaks such as ITER, numeri ...

2019

Observation of magnetic islands in tokamak plasmas during the suppression of edge-localized modes

Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Laurie Porte, Benoît Labit, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Umar Sheikh, Mengdi Kong, Cristian Sommariva, Alessandro Pau

In tokamaks, a leading platform for fusion energy, periodic filamentary plasma eruptions known as edge-localized modes occur in plasmas with high-energy confinement and steep pressure profiles at the plasma edge. These edge-localized modes could damage the ...

2024

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

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

Status, scientific results and technical improvements of the NBH on TCV tokamak

Basil Duval, Ambrogio Fasoli, Timothy Goodman, Stefano Coda, Alexander Karpushov, Duccio Testa, Benoît Labit, Javier García Hernández, Rémy Jacquier, Cristian Galperti, Nicola Vianello, Roberto Maurizio, Matteo Vallar

The TCV tokamak contributes to physics understanding in fusion reactor research by a wide set of experimental tools, like flexible shaping and high power ECRH. A 1MW, 25 keV deuterium heating neutral beam (NB) has been installed in 2015 and it was operated ...

2019

Mechanical analyses of the waveguide flange coupling for the first confinement system of the ITER electron cyclotron upper launcher

René Chavan, Timothy Goodman, Jean-Daniel Landis, Robert Bertizzolo

The four electron cyclotron (EC) upper port antennas (or "upper launchers" -UL) will be used to drive current locally inside magnetic islands located at the q= 2 (or smaller) rational surfaces in order to stabilize neoclassical tearing modes (NTMs), as wel ...

Elsevier Science Sa2016

Chapter 3: MHD stability, operational limits and disruptions

Timothy Goodman, Olivier Sauter

Progress in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed. Recent theoretical and experimental research has made important advances in both understandi ...

IOP Publishing Ltd2007

Electron Bernstein Wave Heating and Emission in the TCV Tokamak

Timothy Goodman, Antoine Pochelon, Stefano Coda, Laurie Porte, Loïc Curchod, Yann Camenen

Electron cyclotron resonance heating (ECRH) of high-density tokamak plasmas is limited because of reflections of the waves at so-called wave cutoffs. Electron Bernstein wave (EBW) heating (EBWH) via a double mode conversion process from ordinary (O)-mode, ...

American Nuclear Society2007

Profile control simulations and experiments on TCV: a controller test environment and results using a model-based predictive controller

Timothy Goodman, Jean-Marc Moret, Olivier Sauter, Sun Hee Kim, Federico Alberto Alfredo Felici, Doohyun Kim, Antoine Pierre Emmanuel Alexis Merle, Anna Teplukhina, Cristian Galperti, Mengdi Kong, Francesco Carpanese

The successful performance of a model predictive profile controller is demonstrated in simulations and experiments on the TCV tokamak, employing a profile controller test environment. Stable high-performance tokamak operation in hybrid and advanced plasma ...

IOP Publishing Ltd2017

Nonlinear excitation of energetic particle driven geodesic acoustic mode by resonance overlap with Alfvén instability in ASDEX Upgrade

The Alfvén instability nonlinearly excited the energetic-particle-driven geodesic acoustic mode on the ASDEX-Upgrade tokamak, as demonstrated experimentally. The mechanism of the energetic-particle-driven geodesic acoustic mode excitation and the mode nonl ...

Nature Research2025

Effect of Ion Irradiation on the Surface Electrical Conductivity of Cucrzr at High Frequencies

René Chavan, Timothy Goodman, Jean-Philippe Hogge, Jérémy Genoud, Avelino Mas Sanchez, Anastasia Xydou, Cinta Lucia Marraco Borderas, Daniel Birlan

The ohmic losses in the Electron Cyclotron Heating system of the DEMO nuclear fusion reactor depend on the surface electrical conductivity of the material at the frequency of the mm-wave beams generated in the gyrotrons. To reduce the ohmic losses, many co ...

ELSEVIER SCIENCE SA2025

Overview of ASDEX Upgrade results

Basil Duval, Timothy Goodman, Olivier Sauter, Stefano Coda, Alberto Bottino, Marco Wischmeier, Andrea Scarabosio, Laurie Porte, Yann Camenen, Thomas Binderup Jensen, Emiliano Fable, Federico Alberto Alfredo Felici, Dávid Wágner, Doohyun Kim, Antoine Pierre Emmanuel Alexis Merle, Nicola Vianello, Cristian Sommariva, Haomin Sun

The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of ...

IOP Publishing Ltd2017

Design and implementation of quasi-optical components for the upgrade of the TCV EC-system

Stefano Alberti, Timothy Goodman, Jean-Philippe Hogge, Laurie Porte, Matthieu Toussaint, Florian Ramseyer

The EC-system of the TCV tokamak is progressively being upgraded with the addition of two MW-class dual-frequency gyrotrons (84 and 126 GHz/2s/1MW). In order to connect the two gyrotrons to the existing low field side and top launchers, new waveguide routi ...

ELSEVIER SCIENCE SA2019

ITER ECH Transmission Line System Design and Status

Timothy Goodman

The electron cyclotron (EC) heating & current drive (H&CD) system on ITER provides plasma heating by generating, transmitting, and launching high-intensity, high-frequency (170 GHz) electromagnetic wave energy steerable across the plasma cross-section. The ...

EDP Sciences2024

Preliminary design of the ITER ECH Upper Launcher

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

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

Thermo-mechanical analysis of an ITER ECH&CD Upper Launcher mirror

René Chavan, Timothy Goodman, Avelino Mas Sanchez, Matteo Vagnoni

The Mirror one Lower (LM1) is part of the in-vessel quasi-optical beam propagation system for the ITER Electro Cyclotron (EC) Upper Launcher (UL), where eight beams are reflected through four mirrors during its passage to the plasma. The mirrors are groupe ...

2018