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NBI fast ion confinement in the helical core of MAST hybrid-like plasmas
Related publications (57)
Equilibrium pressure limits in stellarators
This thesis delves into the potential of magnetic fusion energy, and in particular focuses on the stellarator concept. Stellarators use external coils to produce 3-dimensional (3D) magnetic fields that confine a thermonuclear plasma in a topologically toro ...
EPFL2023An experimental and computational study of tokamak plasma turbulence
Turbulence driven by small-scale instabilities results in strong heat and particle transport, which significantly shortens the confinement time and prevents the formation of a self-sustained plasma reaction in magnetic confinement devices. Control and poss ...
EPFL2023Excitation of toroidal Alfvén eigenmodes with counter-current NBI in the TCV tokamak
Laurie Porte, Alexander Karpushov, Matteo Vallar, Samuele Mazzi
In TCV, unstable modes excited by resonant interaction between the shear Alfvèn waves in con- tinuum gaps and energetic particles have been observed in scenarios with Neutral Beam Injection (NBI). TCV is a middle-size device (R 0 /a = 0.88/0.25) equipped w ...
2023Full-discharge simulation and optimization with the RAPTOR code, from present tokamaks to ITER and DEMO
Tokamak devices aim to magnetically confine a hydrogen plasma at sufficiently high pressure to achieve net energy production from nuclear fusion of light isotopes. Predictive modeling and optimization is crucial for reliable operation of tokamak reactors, ...
EPFL2023Predictive modeling of Alfvén eigenmode stability in inductive scenarios in JT-60SA
Javier García Hernández, Antonio José Pereira de Figueiredo, Matteo Vallar
The JT-60SA device offers unique conditions before ITER for the study of the interaction of energetic particles with plasma waves. With similar dimensions to JET, e.g., a major radius but with a slightly more elongated plasma volume, JT-60SA is used as a h ...
Lausanne2023Nonlinear interaction of Alfvénic instabilities and turbulence via the modification of the equilibrium profiles
Laurent Villard, Alberto Bottino, Xiao Wang
Nonlinear simulations of Alfvén modes (AMs) driven by energetic particles (EPs) in the presence of turbulence are performed with the gyrokinetic particle-in-cell code ORB5. The AMs carry a heat flux, and consequently they nonlinearly modify the plasma temp ...
2023Moving toward mass-conserving simulations of plasma turbulence and kinetic neutrals in the tokamak boundary with the GBS code
A model for the simulation of the tokamak boundary is described, which is mass-conserving to leading order in rho s / R 0 (where rho s is the ion sound Larmor radius and R-0 is the tokamak major radius at the magnetic axis). The model integrates a three-di ...
AMER INST PHYSICS2021ITER baseline scenario investigations on TCV and comparison with AUG
Under the auspices of EUROfusion (WPMST1), the ITER baseline scenario (IBL, [1]) is jointly investigated on AUG and TCV. While the AUG results were presented at the last IAEA FEC [2], this contribution focuses on the recent results obtained in TCV and rela ...
IAEA (FEC2021)2021A non-twisting flux tube for local gyrokinetic simulations
Stephan Brunner, Justin Richard Ball
Local gyrokinetic simulations use a field-aligned domain that twists due to the magnetic shear of the background magnetic equilibrium. However, if the magnetic shear is strong and/or the domain is long, the twist can become so extreme that it fails to prop ...
2021Evolution and ion kinetics of a XUV-induced nanoplasma in ammonia clusters
Marcel Drabbels, Andrew Daniel Bonnar Clark, Verónica Oliver Álvarez de Lara
High-intensity extreme ultraviolet (XUV) pulses from a free-electron laser can be used to create a nanoplasma in clusters. In reference Michiels et al (2020 Phys. Chem. Chem. Phys. 22 7828-34) we investigated the formation of excited states in an XUV-induc ...
2021