Publication
Extension of operation regimes and investigation of three-dimensional currentless plasmas in the Large Helical Device
Related publications (88)
An 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 ...
EPFL2023Plasma turbulence simulations in a diverted tokamak with applied resonant magnetic perturbations
Paolo Ricci, Joaquim Loizu Cisquella, Théophile Boinnard, António João Caeiro Heitor Coelho
The first results of three-dimensional, flux-driven, electrostatic, global, two-fluid turbulence simulations of a diverted tokamak configuration with applied resonant magnetic perturbations generated by a set of saddle coils are presented. The simulations ...
2023Maximum likelihood bolometry for ASDEX upgrade experiments
Bolometry is an essential diagnostic for calculating the power balances and for the understanding of different physical aspects of tokamak experiments. The reconstruction method based on the Maximum Likelihood (ML) principle, developed initially for JET, h ...
Bristol2023Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV
Basil Duval, Christian Gabriel Theiler, Cristian Galperti, Artur Perek
This paper presents the first result using nitrogen-seeded exhaust feedback control of the NII impurity emission front in TCV. The NII emission front position is consistently located below its commonly used CIII counterpart, indicating the NII emission fro ...
IOP Publishing Ltd2023Turbulent transport regimes in the tokamak boundary
The overall performance of a tokamak strongly depends on phenomena that take place in a thin region between the main plasma and the vessel wall, which is denoted as tokamak boundary. In fact, the formation of transport barriers in this region can significa ...
EPFL2022Effects of the parallel flow shear on the ITG-driven turbulent transport in tokamak plasmas
Yann Camenen, Javier García Hernández, Samuele Mazzi
The impact of the parallel flow shear on the tokamak plasma stability and turbulent transport driven by the ion temperature gradient (ITG) modes is analyzed by means of local gyrokinetic numerical analyses. It is shown that the parallel flow shear increase ...
IOP Publishing Ltd2022RADCAM-A radiation camera system combining foil bolometers, AXUV diodes, and filtered soft x-ray diodes
Basil Duval, Umar Sheikh, Luke Simons
Measurements of radiated power are critical for characterizing and optimizing tokamak performance. The RADCAM system, comprising arrays of foil bolometers, Absolute eXtreme UltraViolet (AXUV), and filtered soft x-ray diodes, has been constructed to provide ...
AIP Publishing2022A localized reduced basis approach for unfitted domain methods on parameterized geometries
Annalisa Buffa, Pablo Antolin Sanchez, Margarita Chasapi
This work introduces a reduced order modeling (ROM) framework for the solution of parameterized second-order linear elliptic partial differential equations formulated on unfitted geometries. The goal is to construct efficient projection-based ROMs, which r ...
2022Physics and applications of three-ion ICRF scenarios for fusion research
Henri Weisen, Javier García Hernández, Mikhail Maslov, Samuele Mazzi
This paper summarizes the physical principles behind the novel three-ion scenarios using radio frequency waves in the ion cyclotron range of frequencies (ICRF). We discuss how to transform mode conversion electron heating into a new flexible ICRF technique ...
AMER INST PHYSICS2021First global simulations of plasma turbulence in a stellarator with an island divertor
Paolo Ricci, Joaquim Loizu Cisquella, António João Caeiro Heitor Coelho
We present the results of 3D, flux-driven, global, two-fluid electrostatic turbulence simulations in a 5-field period stellarator with an island divertor. The numerical simulations are carried out with the GBS code, which solves the two-fluid drift-reduced ...
2021