Personne
Paola Paruta
Publications associées (19)
Properties of plasma turbulence in the periphery of diverted tokamaks
Paolo Ricci, Paola Paruta, Maurizio Giacomin, Carrie Fiona Beadle
The turbulent plasma dynamics in the periphery of a tokamak plays a key role in determining its overall performances. In particular, it governs the confinement properties of the device, through the formation of a transport barrier associated with the L-H t ...
2019Simulation of plasma turbulence in the periphery of diverted tokamaks
The turbulent plasma dynamics in the periphery of a fusion device plays a key role in determining its overall performance.
In fact, the periphery controls the heat load on the vessel walls, the plasma confinement, the level of impurities in the core, the ...
EPFL2018Numerical simulations of plasma fuelling in tokamaks using the GBS code
Paolo Ricci, Paola Paruta, Fabio Riva, Christoph Wersal, Carrie Fiona Beadle, André Calado Coroado
The tokamak periphery determines the fuelling of a tokamak as the result of a complex interplay of neutral and plasma dynamics, perpendicular turbulent transport, and losses to the vessel walls. In the present work, results from first-principles numerical ...
2018Turbulence simulations in diverted geometry
Paolo Ricci, Paola Paruta, Maurizio Giacomin, Carrie Fiona Beadle, André Calado Coroado
Abstract The study of scrape-off layer (SOL) is a fundamental step in magnetic confinement fusion research. For example, SOL sets the boundary conditions for the tokamak core and it provides the energy flux toward the tokamak wall. With the goal of improvi ...
2018Simulation of plasma turbulence in the periphery of diverted tokamak by using the GBS code
Paolo Ricci, Paola Paruta, Fabio Riva, Christoph Wersal, Baptiste Jimmy Frei, Carrie Fiona Beadle
We report on the implementation of diverted magnetic equilibria in GBS and on first simulations in this geometry. GBS is a simulation code used to evolve plasma turbulence in the tokamak periphery by solving the drift-reduced Braginskii's equations. The mo ...
2018Scrape-off layer simulations in a Double Null magnetic configuration
Paolo Ricci, Paola Paruta, Fabio Riva, Christoph Wersal, Carrie Fiona Beadle
Different magnetic geometries are being considered for handling the power exhaust in DEMO, among which is the double-null. In addition to doubling the exhaust area, experiments have found stark differences in the SOL on the HFS and LFS in this configuratio ...
2017Plasma refuelling at the SOL simulated with the GBS code
Paolo Ricci, Paola Paruta, Fabio Riva, Christoph Wersal, Carrie Fiona Beadle, André Calado Coroado
The scrape-off layer (SOL) sets the bounday conditions of a tokamak, determining the plasma confinement, the heat exhaust, the impurity levels, and controlling the fuelling of the device. Therefore, a first principles understanding of the physical mechanis ...
2017Implementation of Diverted Equilibria in the GBS simulation code
Paola Paruta, Fabio Riva, Christoph Wersal, Baptiste Jimmy Frei, Carrie Fiona Beadle
Simulating the most external plasma region of a tokamak, the scrape-off layer (SOL), is of crucial importance on the path towards a fusion reactor as heat load on the vessel wall, impurity generation, and overall plasma confinement all depend on the plasma ...
2017A methodology for the rigorous verification of plasma simulation codes
Paolo Ricci, Joaquim Loizu Cisquella, Paola Paruta, Sébastien Jolliet, Federico David Halpern, Fabio Riva, Annamaria Mosetto, Christoph Wersal, Carrie Fiona Beadle
A methodology to perform a rigorous verification of Particle-in-Cell (PIC) simulations is presented, both for assessing the correct implementation of the model equations (code verification), and evaluating the numerical uncertainty affecting the simulation ...
2017Scrape-off-layer current loops and floating potential in limited tokamak plasmas
Paolo Ricci, Joaquim Loizu Cisquella, Paola Paruta, Federico David Halpern
We investigate the question of how plasma currents circulate and close in the scrape-off-layer (SOL) of convection-limited tokamak plasmas. A simplified two-fluid model describes how currents must evacuate charge at the sheaths due to cross-field currents ...
Cambridge University Press2017