Publications associées à Ideal and Resistive Impurity Parallel-velocity-gradient Instability

Publications associées (13)

Gyrokinetic flux-driven simulations in mixed TEM/ITG regime using a delta-f PIC scheme with evolving background

Laurent Villard, Stephan Brunner, Moahan Murugappan, Giovanni Di Giannatale

In the context of global gyrokinetic simulations of turbulence using a particle-in-cell framework, verifying the delta-f assumption with a fixed background distribution becomes challenging when determining quasi-steady state profiles corresponding to given ...

American Institute of Physics (AIP)2024

Conceptual design of a modular EC heating system for EU-DEMO

Timothy Goodman, Jean-Philippe Hogge, René Chavan, Anastasia Xydou, Cinta Lucia Marraco Borderas, Daniel Birlan, Marc Noël, Fabien Pierre Crisinel, Arnaud Clément

The European DEMO (EU-DEMO) reactor studies within EUROfusion aim to develop a fusion power plant concept. The large tokamak device needs an auxiliary heating power which, at the present stage, is provided by the Electron Cyclotron (EC) heating system with ...

IOP Publishing Ltd2024

Resonant network antennas for radio-frequency plasma sources: Theory, technology and applications

Ivo Furno, Alan Howling, Philippe Frédérique Bruno Guittienne

Resonant antennas are increasingly employed by the plasma industry, and the theory has now developed alongside the technological applications to the extent that it is timely to document the progress in this field to aid antenna design for future novel RF p ...

Institute of Physics Publishing2024

Revisiting the Excitation of the Low-Lying ^{181m}Ta Isomer in Optical Laser-Generated Plasma

Fabrizio Carbone, Ivan Madan, Giovanni Maria Vanacore, Simone Gargiulo, Veronica Leccese, Benoît Guilhem Michel Binh Truc, Kjeld Adrianus Antonius Gerardus Beeks, Paolo Usai

The excitation of the ^{181m}Ta isomer in the laser-plasma scenario was claimed to have been observed more than two decades ago. However, the reported experimental findings-and the respective high excitation rate-were later questioned as they could not be ...

2024

Cross-calibration and first vertical ECE measurement of electron energy distribution in the TCV tokamak

Ambrogio Fasoli, Stefano Coda, Joan Decker, Arsène Stéphane Tema Biwole

This paper describes the first vertical electron cyclotron emission measurement of non-thermal electron distributions in the Tokamak à Configuration Variable. These measurements were conducted in runaway electron scenarios and in the presence of electron c ...

2024

The Combined Effects of Vertical and Horizontal Shear Instabilities in Stellar Radiative Zones

Saniya Khan

Shear instabilities can be the source of significant amounts of turbulent mixing in stellar radiative zones. Past attempts at modeling their effects (either theoretically or using numerical simulations) have focused on idealized geometries, where the shear ...

Iop Publishing Ltd2024

Initial Results From the SPIDER Beamlet Current Diagnostic

Basile Marie Jacques Pouradier Duteil

Source for the production of ions of deuterium extracted from a radio frequency plasma (SPIDER) is the full-scale prototype for the ITER heating neutral beam (HNB) source. Beam operation in SPIDER, with the eventual aim of achieving 100-keV, 46-A hydrogen ...

2022

Spatially resolved diagnostics for optimization of large ion beam sources

Polina Zablotskaia, Basile Marie Jacques Pouradier Duteil

Giant negative ion sources for neutral beam injectors deliver huge negative ion currents, thanks to their multi-beamlet configuration. As the single-beamlet optics defines the transmission losses along the beamline, the extraction of a similar current for ...

2022

Collisionless losses of fast ions in the divertor tokamak test due to toroidal field ripple

Matteo Vallar

In this paper we analyze fast ion motion in the divertor tokamak test (DTT) device (Albanese et al 2017 Nucl. Fusion 57 016010). It is planned that DTT will be heated through a mix of 45 MW heating power, including 15 MW negative-ion-based neutral beam hea ...

IOP Publishing Ltd2021

Hydrodynamic-driven morphogenesis of karst draperies: spatio-temporal analysis of the two-dimensional impulse response

François Gallaire, Matthieu Wyart, Pier Giuseppe Ledda, Gaëtan Pierre Clément Lerisson

We study the role of hydrodynamic instabilities in the morphogenesis of some typical karst draperies structures encountered in limestone caves. The problem is tackled using the long wave approximation for the fluid film that flows under an inclined substra ...

Cambridge University Press2021

Discrete shedding of secondary vortices along a modified Kaden spiral

Karen Ann J Mulleners, Diego Francescangeli

When an object is accelerated in a fluid, a primary vortex is formed through the roll-up of a shear layer. This primary vortex does not grow indefinitely and will reach a limiting size and strength. Additional vorticity beyond the critical limit will end u ...

Cambridge University Press2021

Development of a react and wind conductor for the ITER toroidal field coils

Pierluigi Bruzzone, Rainer Wesche, Boris Stepanov

IEEE Institute of Electrical and Electronics Engineers2008

Reversed current density in tokamaks - equilibrium and stability issues

Laurent Villard, Andrei Martynov

2005