Publication
Shedding light on the MRI-driven dynamo in a stratified shearing box
Related publications (36)
Iterative removal of sources to model the turbulent electromotive force
We describe a novel method to compute the components of dynamo tensors from direct magnetohydrodynamic (MHD) simulations. Our method relies upon an extension and generalization of the standard H & ouml;gbom CLEAN algorithm widely used in radio astronomy to ...
Oxford Univ Press2024Equilibrium 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 ...
EPFL2023Dissipative magnetic structures and scales in small-scale dynamos
Small-scale dynamos play important roles in modern astrophysics, especially on galactic and extragalactic scales. Owing to dynamo action, purely hydrodynamic Kolmogorov turbulence hardly exists and is often replaced by hydromagnetic turbulence. Understandi ...
OXFORD UNIV PRESS2023Dynamo instabilities in plasmas with inhomogeneous chiral chemical potential
We study the dynamics of magnetic fields in chiral magnetohydrodynamics, which takes into account the effects of an additional electric current related to the chiral magnetic effect in high-energy plasmas. We perform direct numerical simulations, consideri ...
AMER PHYSICAL SOC2022Production of a Chiral Magnetic Anomaly with Emerging Turbulence and Mean-Field Dynamo Action
In relativistic magnetized plasmas, asymmetry in the number densities of left-and right-handed fermions, i.e., a nonzero chiral chemical potential mu(5), leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a u ...
AMER PHYSICAL SOC2022Development of statistical analysis tools for global observable of fluctuation data towards optimised real-time control applications
Garance Hélène Salomé Durr-Legoupil-Nicoud
The StatComp package is a Matlab statistical toolbox developed over the years by Dr. Testa and his students. It has been inspired by M. R. Brown’s paper Magnetohydrodynamic Turbulence: Observation and experiment [2]. It first performed the analysis of the ...
2022Global fluid simulation of plasma turbulence in a stellarator with an island divertor
Paolo Ricci, Joaquim Loizu Cisquella, Maurizio Giacomin, António João Caeiro Heitor Coelho
Results of a three-dimensional, flux-driven, electrostatic, global, two-fluid turbulence simulation for a five-field period stellarator with an island divertor are presented. The numerical simulation is carried out with the GBS code, recently extended to s ...
2022Turbulence in the scrape-off layer of double-null tokamak configurations
Understanding the turbulent dynamics in the outermost region of the tokamak is essential to predict and control the heat and particle loads to the vessel wall, a crucial problem for the entire fusion program. In this thesis, the problem is approached via t ...
EPFL2021The Alfvenic nature of chromospheric swirls
Aleksi Antoine Bossart, Andrea Francesco Battaglia
Context. Observations show that small-scale vortical plasma motions are ubiquitous in the quiet solar atmosphere. They have received increasing attention in recent years because they are a viable candidate mechanism for the heating of the outer solar atmos ...
EDP SCIENCES S A2021Chiral fermion asymmetry in high-energy plasma simulations
The chiral magnetic effect (CME) is a quantum relativistic effect that describes the appearance of an additional electric current along a magnetic field. It is caused by an asymmetry between the number densities of left- and right-handed fermions, which ca ...
2020