T. Goodman
A5028866341- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Fusion materials and technologies
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Microwave Engineering and Waveguides
- Physics of Superconductivity and Magnetism
- Laser-Plasma Interactions and Diagnostics
- Metal and Thin Film Mechanics
- Dust and Plasma Wave Phenomena
- Advancements in Photolithography Techniques
- Electromagnetic Launch and Propulsion Technology
- Electrostatic Discharge in Electronics
- Nuclear reactor physics and engineering
- Semiconductor materials and devices
- Acoustic Wave Resonator Technologies
- Advanced Sensor and Control Systems
- Solar and Space Plasma Dynamics
- Terahertz technology and applications
- Pulsed Power Technology Applications
- Semiconductor Quantum Structures and Devices
- Advanced Surface Polishing Techniques
École Polytechnique Fédérale de Lausanne
2015-2025
Karlsruhe Institute of Technology
2013-2017
Laboratoire de Physique des Plasmas
2007-2015
Japan External Trade Organization
2015
École Normale Supérieure - PSL
2010
National Agency for New Technologies, Energy and Sustainable Economic Development
2009
ITER
2009
Fusion for Energy
2008
Los Alamos National Laboratory
2002
University of South Florida
1997-1999
Progress in the area of MHD stability and disruptions, since publication 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137–2664), is reviewed. Recent theoretical experimental research has made important advances both understanding control tokamak plasmas. Sawteeth are anticipated baseline ELMy H-mode scenario, but tools exist to avoid or them through localized current drive fast ion generation. Active other instabilities will most likely be also required ITER. Extrapolation from...
Abstract The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and preparation operation, as well addressing issues for a future DEMO design. Since 2015, AUG equipped with new pair 3-strap ICRF antennas, which were designed reduction tungsten release during operation. As predicted, factor two on ICRF-induced W plasma content could be achieved by sheath voltage at antenna limiters via compensation image currents central side straps in...
Electron cyclotron wave beams injected from a launcher placed in the upper part of vessel will be used ITER to control MHD instabilities, particular neoclassical tearing modes (NTMs). Simplified NTM stabilization criteria have been past guide optimization launcher. Their derivation is reviewed this paper and their range applicability clarified. Moreover, possible effects leading deterioration predicted performance are discussed. Particularly critical context broadening electron-cyclotron...
The application of radio frequency (RF) vacuum electronics for the betterment human condition began soon after invention first tubes in 1920s and has not stopped since. Today, microwave devices are powering important applications health treatment, material biological science, wireless communication-terrestrial space, Earth environment remote sensing, promise safe, reliable, inexhaustible energy. This article highlights some exciting frontiers electronics.
Metal-coated polymers shaped by 3D stereolithography are introduced as a new manufacturing method for passive components millimeter to terahertz electromagnetic waves. This concept offers increased design capabilities and flexibilities while shortening the process of complex shapes, e.g., corrugated horns, mirrors, etc. Tests at 92.5, 140, 170 GHz reported.
Abstract The European DEMO (EU-DEMO) reactor studies within EUROfusion aim to develop a fusion power plant concept. large tokamak device needs an auxiliary heating which, at the present stage, is provided by Electron Cyclotron (EC) system with up 130 MW foreseen reach different regions of plasma for heating, suppression instabilities and possibility support ramp-up ramp-down phases. conceptual design based on 2 coaxial-cavity gyrotron sources, transmission line (TL) using both circular...
The TCV tokamak facility is used to study the effect of innovative plasma shapes on core and edge confinement properties. In low collisionality L-mode plasmas with electron cyclotron heating (ECH) increases increasing negative triangularity δ. improvement correlates a decrease inner heat transport, even though vanishes core, pointing non-local transport has recently started effects in H-mode plasmas. known improve towards positive triangularity, due increase pedestal height, plagued by...
Clear observations of early triggering neo-classical tearing modes by sawteeth with long quiescent periods have motivated recent efforts to control, and in particular destabilize, sawteeth. One successful approach explored TCV utilizes electron cyclotron heating order locally increase the current penetration time core. The latter is also achieved various machines depositing drive or ion close q = 1 rational surface. Crucially, localized succeeds destabilizing which are otherwise stabilized a...
The modification of the stability and behaviour core MHD with local electron cyclotron current drive (ECCD) is presented. Starting from innermost resonant surface, q = 1 hence sawtooth period size sawteeth controlled on/off-axis co-/counter-ECCD. themselves can serve as a trigger for neoclassical tearing modes (NTMs) therefore excitation NTMs be influenced. Once these get excited they fully stabilized at high βN co-ECCD surface. Detailed experiments on dependence stabilization ECCD...
Intense electron cyclotron resonance heating (ECRH) and current drive (ECCD) are employed on the Tokamak à Configuration Variable (TCV) both in second- third-harmonic X-mode (X2 X3). The plasma behaviour under such conditions is driven largely by dynamics, motivating extensive studies of relaxation phenomena governing thermal suprathermal populations. In particular, dynamics electrons intimately tied to physics X2 ECCD. ECRH also a useful tool for manipulating distribution function physical...
Experiments with high-power electron cyclotron heating (ECH) and current drive (ECCD) in the TCV tokamak are discussed. Power up to 2.7 MW from six gyrotrons is delivered at second-harmonic frequency (82.7 GHz) X-mode. The power transmitted plasma by independent launchers, each equipped steerable mirrors that allow a wide variety of injection angles both poloidal toroidal directions. Fully non-inductive operation has been achieved steady state, for full 2 s gyrotron pulse duration, co-ECCD...
The acceleration of electrons during a sawtooth crash is demonstrated in various regimes the TCV tokamak plasma. Simultaneous measurements electron cyclotron emission from low field side and high provide information on fast dynamics with resolution. density, energy effective radial diffusion coefficient suprathermal population are quantitatively reconstructed. total kinetic generated comparable to magnetic released crash.
The upgrade of the EC-system TCV tokamak has entered in its realization phase and is part a broader TCV. MW-class dual-frequency gyrotrons (84 or 126GHz/2s/1MW) are presently being manufactured by Thales Electron Devices with first gyrotron foreseen to be delivered at SPC end 2017. In parallel development, for extending level operational flexibility integration adds significant complexity evacuated 63.5mm-diameter HE11 transmission line system connected various low-field side top launchers....
The first demonstration of electron-Bernstein-wave heating by double-mode conversion from the $O$ to $X$ mode in an overdense $H$-mode tokamak plasma has been achieved Tokamak \`a Configuration Variable device. This technique overcomes upper density limit experienced conventional microwave heating. sensitive dependence $O\mathrm{\text{\ensuremath{-}}}X$ on launching direction verified experimentally, and localized power deposition consistent with theoretical predictions observed at densities...
The M1 mirrors are part of the in-vessel quasi-optical Electron Cyclotron beam propagation system DEMO nuclear fusion reactor. These four all non-movable and with a plane reflecting surface. Based on their functionality they divided into two groups, Mid-Steering Antenna (MSA) Multi-Beam Mirror (MBM) antenna. MSA is responsible for controlling neoclassical tearing modes, while MBM available plasma bulk heating, current drive thermal instability control. designed to withstand loads generated...