W A Gracias
A5088475766- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Fusion materials and technologies
- Fluid Dynamics and Turbulent Flows
- Superconducting Materials and Applications
- Advanced Data Storage Technologies
- Fluid Dynamics and Heat Transfer
- Laser-Plasma Interactions and Diagnostics
- Dust and Plasma Wave Phenomena
- Lattice Boltzmann Simulation Studies
Universidad Carlos III de Madrid
2016-2021
Centre National de la Recherche Scientifique
2016-2017
Centrale Marseille
2017
Aix-Marseille Université
2016
Four numerical codes are employed to investigate the dynamics of scrape-off layer filaments in tokamak relevant conditions. Experimental measurements were taken MAST device using visual camera imaging, which allows evaluation perpendicular size and velocity filaments, as well combination density temperature associated with perturbation. A new algorithm based on light emission integrated along field lines position filament is developed ensure that it properly detected tracked. The found have...
New results from MAST are presented that focus on validating models in order to extrapolate future devices. Measurements during start-up experiments have shown how the bulk ion temperature rise scales with square of reconnecting field. During current ramp-up, not able correctly predict diffusion. Experiments been performed looking at edge and core turbulence. At edge, detailed studies revealed filament characteristics responsible for determining near far scrape off layer density profiles. In...
Abstract Fluid models used to study the edge plasma region need be benchmarked against similar conditions given that can strongly differ in complexity and therefore results they produce. Via this validation undertaken through framework of EUROfusion Enabling Research, four state-of-the art models—GBS, Hermes/BOUT++, hot-edge-sol-electrostatic TOKAM3X—are compared experimental turbulence measurements on ISTTOK tokamak. Statistical comparisons simulation experiment data show fluid here...
Seeded filament simulations are used to study blob dynamics with the state-of-the-art TOKAM3X fluid code in scrape-off layer (SOL) using a slab geometry. The filamentary recovered compared previously predicted analytical velocity scalings while also studying effect of field line pitch angle on these and found be similar. changing magnetic topology motion is investigated. Magnetic shear introduced model by sudden localised variation for narrow radially located region constituting effectively...