C. Angioni
A5015061883- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Fusion materials and technologies
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
- Plasma Diagnostics and Applications
- Power System Optimization and Stability
- Nuclear Physics and Applications
- Geophysics and Gravity Measurements
- Nuclear Materials and Properties
- Atomic and Subatomic Physics Research
- Electrostatic Discharge in Electronics
- Smart Grid Security and Resilience
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- Dust and Plasma Wave Phenomena
- High-pressure geophysics and materials
- Fluid Dynamics and Turbulent Flows
- GNSS positioning and interference
- Physics of Superconductivity and Magnetism
- Advancements in Semiconductor Devices and Circuit Design
- Computational Fluid Dynamics and Aerodynamics
Max Planck Institute for Plasma Physics
2016-2025
University of Rome Tor Vergata
2024
Culham Science Centre
2014-2024
Culham Centre for Fusion Energy
2016-2024
Fusion Academy
2019-2023
Fusion (United States)
2019-2023
Max Planck Society
2012-2021
General Atomics (United States)
2018-2021
Ludwig-Maximilians-Universität München
2021
Royal Military Academy
2020
Expressions for the neoclassical resistivity and bootstrap current coefficients in terms of aspect ratio collisionality are widely used simulating toroidal axisymmetric equilibria transport evolution. The formulas most cases based on works done 15–20 years ago, where results have been obtained large ratio, small or very collisionality, with a reduced collision operator. best expressions to date our knowledge due Hirshman [S. P. Hirshman, Phys. Fluids 31, 3150 (1988)] arbitrary banana regime...
A complex interaction between turbulence driven $E\ifmmode\times\else\texttimes\fi{}B$ zonal flow oscillations, i.e., geodesic acoustic modes (GAMs), the turbulence, and mean equilibrium flows is observed during low to high ($L\mathrm{\text{\ensuremath{-}}}H$) plasma confinement mode transition in ASDEX Upgrade tokamak. Below $L\mathrm{\text{\ensuremath{-}}}H$ threshold at densities a limit-cycle oscillation forms with competition level GAM shearing. At higher cycle diminished, while $H$...
The physics base for the ITER Physics Design Guidelines is reviewed in view of application to DEMO and areas are pointed out which improvement needed arrive at a consistent set Guidelines. Amongst proposed improvements, area power exhaust plays crucial role since predictive capability present-day models low this expected play major limiting designs due much larger value Ptot/R than devices even ITER.
Abstract The JET 2019–2020 scientific and technological programme exploited the results of years concerted engineering work, including ITER-like wall (ILW: Be W divertor) installed in 2010, improved diagnostic capabilities now fully available, a major neutral beam injection upgrade providing record power 2019–2020, tested technical procedural preparation for safe operation with tritium. Research along three complementary axes yielded wealth new results. Firstly, plasma delivered scenarios...
Abstract In 2021 JET exploited its unique capabilities to operate with T and D–T fuel an ITER-like Be/W wall (JET-ILW). This second major campaign (DTE2), after DTE1 in 1997, represented the culmination of a series enhancements—new fusion diagnostics, new injection capabilities, refurbishment plant, increased auxiliary heating, in-vessel calibration 14 MeV neutron yield monitors—as well as significant advances plasma theory modelling community. DTE2 was complemented by sequence isotope...
Abstract The most efficient and promising operational regime for the International Thermonuclear Experimental Reactor tokamak is high-confinement mode. In this regime, however, periodic relaxations of plasma edge can occur. These edge-localized modes pose a threat to integrity fusion device. Here we reveal strong impact energetic ions on spatio-temporal structure in tokamaks using nonlinear hybrid kinetic–magnetohydrodynamic simulations. A resonant interaction between fast at electromagnetic...
Abstract Progress in physics understanding and theoretical model development of plasma transport confinement (TC) the ITPA TC Topical Group since publication ITER Physics Basis (IPB) document (Doyle et al 2007 Nucl. Fusion 47 S18) was summarized focusing on contributions to burning prediction control. This paper provides a general streamlined overview advances that were mainly led by joint experiments activities for last 15 years (see JEX/JA table appendix). starts with scientific strategy...
In this Letter, the influence of "Coriolis drift" on small scale instabilities in toroidal plasmas is shown to generate a momentum pinch velocity. Such results because Coriolis drift generates coupling between density and temperature perturbations one hand perturbed parallel flow velocity other. A simple fluid model used highlight physics mechanism gyro-kinetic calculations are performed accurately assess magnitude pinch. The derived leads radial gradient profile even absence torque plasma...
This paper is an overview of recent results relating to turbulent particle and heat transport, the triggering internal transport barriers (ITBs). The dependence pinch velocity on plasma parameters has been clarified compared with experiment. Magnetic shear collisionality are found play a central role. Analysis made progress along two directions: dimensionless scaling laws, which agree prediction for electrostatic turbulence, analysis modulation experiments, provide stringent test models....
The physical processes producing electron particle transport in the core of tokamak plasmas are described. Starting from gyrokinetic equation, a simple analytical derivation is used as guidance to illustrate main mechanisms driving turbulent convection. A review experimental observations on tokamaks presented and consistency with theoretical predictions discussed. An overall qualitative agreement, some cases even specific quantitative emerges between complex equally observations, exhibiting...
The 2014–2016 JET results are reviewed in the light of their significance for optimising ITER research plan active and non-active operation. More than 60 h plasma operation with first wall materials successfully took place since its installation 2011. New multi-machine scaling type I-ELM divertor energy flux density to is supported by principle modelling. relevant disruption experiments modelling reported a set three mitigation valves mimicking setup. Insights L–H power threshold Deuterium...
The behaviour of tungsten in the core hybrid scenario plasmas JET with ITER-like wall is analysed and modelled a combination neoclassical gyrokinetic codes. In these discharges, good confinement conditions can be maintained only for first 2?3?s high power phase. Later W accumulation regularly observed, often accompanied by onset magneto-hydrodynamical activity, particular tearing modes (NTMs), both which have detrimental effects on global energy confinement. dynamics process examined, taking...
In the European fusion roadmap, ITER is followed by a demonstration power reactor (DEMO), for which conceptual design under development. This paper reports first results of coherent effort to develop relevant physics knowledge that (DEMO Physics Basis), carried out experts. The program currently includes investigations in areas scenario modeling, transport, MHD, heating & current drive, fast particles, plasma wall interaction and disruptions.
Toroidal momentum transport mechanisms are reviewed and put in a broader perspective. The generation of finite flux is closely related to the breaking symmetry (parity) along field. argument allows for systematic identification possible mechanisms. Those that appear lowest order normalized Larmor radius (the diagonal part, Coriolis pinch, E × B shearing, particle flux, up–down asymmetric equilibria) reasonably well understood. At higher order, expected be importance plasma edge, theory still...
New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from combined effect high rotational shear and low magnetic shear. The observations have important implications for understanding improved confinement advanced tokamak scenarios. Simulations using quasilinear fluid gyrofluid models show features mitigation, while nonlinear gyrokinetic simulations do not....
Abstract In tokamaks, turbulent particle and toroidal momentum transport are both characterized by the presence of off-diagonal contributions which play an essential role in establishing profile shapes density rotation under most conditions. this paper similarities differences between two channels pointed out and, thereby, interesting physical aspects connect identified. The main to reviewed means a rather simplified description, aims at providing, when possible, direct connection...
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...
Abstract For the past several years, JET scientific programme (Pamela et al 2007 Fusion Eng. Des . 82 590) has been engaged in a multi-campaign effort, including experiments D, H and T, leading up to 2020 first with 50%/50% D–T mixtures since 1997 ever plasmas ITER mix of plasma-facing component materials. this purpose, concerted physics technology was launched view prepare campaign (DTE2). This paper addresses key elements developed by directly contributing preparation. intense preparation...
Abstract In this paper, the theory of collisional and turbulent transport impurities in tokamak plasmas is reviewed. The results are presented with aim providing at same time a historical reconstruction scientific progress complete description present theoretical knowledge, hopefully sufficiently reference to works which have been published field last decades. After general introduction on physics challenges offered by problem impurity their relevance for practical nuclear fusion energy,...
Abstract The JET hybrid scenario has been developed from low plasma current carbon wall discharges to the record-breaking Deuterium-Tritium plasmas obtained in 2021 with ITER-like Be/W wall. development started pure Deuterium refinement of current, and toroidal magnetic field choices succeeded solving heat load challenges arising 37 MW injected power ITER like environment, keeping radiation edge core controlled, avoiding MHD instabilities reaching high neutron rates. have re-run Tritium...
Abstract An overview is presented of the progress since 2021 in construction and scientific programme preparation Divertor Tokamak Test (DTT) facility. Licensing for building has been granted at end 2021. Cat. A radiologic source also 2022. The toroidal field magnet system progressing. prototype 170 GHz gyrotron produced it now under test on FALCON design vacuum vessel, poloidal coils civil infrastructures completed. shape first DTT divertor agreed with EUROfusion to different plasma exhaust...
Particle transport in magnetized plasmas is investigated with a fluid model of drift wave turbulence. An analytical calculation shows that magnetic field curvature and thermodiffusion drive an anomalous pinch. The driven pinch velocity consistent the prediction turbulence equipartition theory. flux found to be directed inward for small ratio electron ion pressure gradient, it reverses its sign when increasing this ratio. Numerical simulations confirm turbulent particle exists. It mainly by...