Publications related to Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

Global fluid simulation of plasma turbulence in stellarators with the GBS code

The implementation of three-dimensional magnetic fields, such as the ones of stellarators, in the GBS code (Ricci et al 2012 Plasma Phys. Control. Fusion54 124047; Giacomin et al 2022 J. Comput. Phys.464 111294) is presented, and simulation results are dis ...

2024

Global fluid simulations of plasma turbulence in stellarators

António João Caeiro Heitor Coelho

In order to cope with the decarbonization challenge faced by many countries, fusion is one of the few alternatives to fossil fuels for the production of electricity. Two devices invented in the middle of the previous century have emerged as the most promis ...

EPFL2024

Equilibrium β-limits dependence on bootstrap current in classical stellarators

Jonathan Graves, Joaquim Loizu Cisquella, Antoine Baillod

While it is important to design stellarators with high magnetohydrodynamic stability β-limit, it is also crucial to ensure that good magnetic surfaces exist in a large range of β values. As β increases, pressure-driven currents perturb the vacuum magnetic ...

2023

Equilibrium pressure limits in stellarators

Antoine Baillod

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 ...

EPFL2023

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

Federico Pesamosca

Thermonuclear controlled fusion is a promising answer to the current energy and climate issues, providing a safe carbon-free source of energy which is virtually inexhaustible. In magnetic confinement thermonuclear fusion based on tokamak reactors, hydrogen ...

EPFL2021

Towards integrated control of tokamak plasmas: physics-based control of neoclassical tearing modes in the TCV tokamak

Mengdi Kong

Neoclassical tearing modes (NTMs), magnetic islands located at rational

q

surfaces, are an important class of resistive magnetohydrodynamics (MHD) instabilities in tokamak plasmas, with

q

the safety factor. NTMs are one of the main constraints of the a ...

EPFL2020

Convergent momentum-space OPE and bootstrap equations in conformal field theory

Marc Gillioz

General principles of quantum field theory imply that there exists an operator product expansion (OPE) for Wightman functions in Minkowski momentum space that converges for arbitrary kinematics. This convergence is guaranteed to hold in the sense of a dist ...

SPRINGER2020

Turbulence and flows in the plasma boundary of snowflake magnetic configurations

Paolo Ricci, Louis Nicolas Stenger, Maurizio Giacomin

The power exhaust through the scrape-off layer (SOL) in fusion reactors is expected to be significantly higher than in ITER, thus questioning the extrapolation of the ITER exhaust solution to these devices. The snowflake (SF) magnetic configuration is one ...

2020

On the triggerless onset of 2/1 neoclassical tearing modes in TCV

Olivier Sauter, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Mengdi Kong

Triggerless

2/1

neoclassical tearing modes (NTMs), i.e.

2/1

NTMs that originate from unstable safety factor profiles (with positive classical stability index at zero island width, i.e.

\Delta'_0>0

) and saturate neoclassically under the effect of pert ...

IOP2019

The conformal bootstrap: Theory, numerical techniques, and applications

Alessandro Vichi

Conformal field theories have been long known to describe the fascinating universal physics of scale invariant critical points. They describe continuous phase transitions in fluids, magnets, and numerous other materials, while at the same time sit at the h ...

AMER PHYSICAL SOC2019

Recent advances in the design of quasiaxisymmetric stellarator plasma configurations

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Global fluid simulation of plasma turbulence in stellarators with the GBS code

Global fluid simulations of plasma turbulence in stellarators

Equilibrium β-limits dependence on bootstrap current in classical stellarators

Equilibrium pressure limits in stellarators

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

Towards integrated control of tokamak plasmas: physics-based control of neoclassical tearing modes in the TCV tokamak

Convergent momentum-space OPE and bootstrap equations in conformal field theory

Turbulence and flows in the plasma boundary of snowflake magnetic configurations

On the triggerless onset of 2/1 neoclassical tearing modes in TCV

The conformal bootstrap: Theory, numerical techniques, and applications

Equilibrium β-limits dependence on bootstrap current in classical stellarators

Global fluid simulations of plasma turbulence in stellarators

Global fluid simulation of plasma turbulence in stellarators with the GBS code

Convergent momentum-space OPE and bootstrap equations in conformal field theory

Equilibrium pressure limits in stellarators

Model-based optimization of magnetic control in the TCV tokamak: design and experiments

The conformal bootstrap: Theory, numerical techniques, and applications

Towards integrated control of tokamak plasmas: physics-based control of neoclassical tearing modes in the TCV tokamak

Turbulence and flows in the plasma boundary of snowflake magnetic configurations

On the triggerless onset of 2/1 neoclassical tearing modes in TCV