A5059245605- Magnetic confinement fusion research
- Fusion materials and technologies
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Fluid Dynamics and Turbulent Flows
- Mass Spectrometry Techniques and Applications
- Frequency Control in Power Systems
- Quantum Chromodynamics and Particle Interactions
- Plasma Applications and Diagnostics
- Geomagnetism and Paleomagnetism Studies
- Electrohydrodynamics and Fluid Dynamics
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Pulsed Power Technology Applications
- Gyrotron and Vacuum Electronics Research
- Electromagnetic Launch and Propulsion Technology
Institut de Recherche sur la Fusion par Confinement Magnétique
2021-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2019-2023
CEA Cadarache
2019-2023
Laboratoire de Physique des Plasmas
2021-2022
Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux
2018
Understanding the role of gaseous environment in plasma–liquid interactions is crucial for multiple applications CAPs.
Tungsten transport is investigated in WEST long pulse L-mode plasmas operated with the strike point on actively cooled upper tungsten divertor. The pulses are mostly heated by lower hybrid waves. It experimentally found that does not centrally accumulate throughout these ∼ 30 s reproducible discharges despite large normalised electron density gradients . To explain observations, turbulent and neoclassical of electrons ions computed GKW Peeters A.G. et al (2009 Computer Phys. Commnun. 180...
Abstract Sheared flows are known to reduce turbulent transport by decreasing the correlation length and/or intensity of structures. The barrier that takes place at edge during improved regimes such as H mode, corresponds establishment a large shear radial electric field. In this context, shape field or more exactly perpendicular E × B velocity appears key element in accessing confinement regimes. paper, we present profile measured using Doppler back-scattering system plasma, dominated...
Abstract High power experiments, up to 9.2 MW with LHCD and ICRH, have been carried out in the full tungsten tokamak WEST. Quasi non inductive discharges achieved allowing extend plasma duration 53 s stationary conditions particular respect contamination. Transitions H mode are observed, H-modes lasting 4 obtained. The increase stored energy is weak since crossing separatrix close L–H threshold. Hot L plasmas (central temperature exceeding 3 keV) a confinement time following ITER L96 scaling...
In absence of external torque, plasma rotation in tokamaks results from a balance between collisional magnetic braking and turbulent drive. The outcome this competition cooperation is essential to determine the flow. A reduced model, supported by gyrokinetic simulations, first used explain quantify only. ripple amplitude above which drag overcomes viscosity obtained. synergetic impact on toroidal Reynolds stress explored. Simulations show that main effect comes an enhancement radial electric...
Abstract Radial transport in scrape off layer is commonly attributed to the intermittent convection of plasma filaments. These filaments are observed experiments, and reproduced by turbulent simulations. simulations able reproduce both filament velocities main (SOL) widths measured circular geometries. In this contribution a comprehensive model derived, predicting absolute amplitude radial flux SOL from interchange turbulence. This spectral (SF model) describes an assembly poloidal waves...
The presence and the position of an X-point, namely, if ion diamagnetic drift points toward it or not, strongly impact edge plasma rotation in tokamaks. In absence kinetic effects such as magnetic ripple orbit loss, shape velocity profile results from balance between neoclassical predictions turbulent flow generation. this contribution, we derive a reduced model turbulence plunged shear flow. This is based on (1) description sheared interchange (2) prediction poloidal momentum generated by...
Abstract The intermittent convection of plasma filaments, or blobs , is commonly considered to be responsible the transport across flux surfaces in scrape-off layer (SOL) fusion devices. Isolated filament models are generally derived from vorticity conservation order deduce speed these showing good predictions against experimental measurements on individual but yet unable predict total associated events. In this work, isolated approach extended a model poloidal spectra for both potential and...
Abstract The effect of magnetic field ripple on tokamak plasma without turbulence is studied numerically and augmented with a reduced analytical model that includes neoclassical processes in the presence non-axisymmetric perturbation stochastic transport. For this study, has been implemented GYSELA gyrokinetic code. This implementation verified thanks to test toroidal angular momentum conservation. code was then successfully benchmarked against NEO code, which solves drift kinetic equation,...