Publications associées à Diffusion magnétique

An analytical solution of the isentropic vortex problem in the special relativistic magnetohydrodynamics

The isentropic vortex problem is frequently solved to test the accuracy of numerical methods and verify corresponding code. Unfortunately, its existing solution was derived in the relativistic magnetohydrodynamics by numerically solving an ordinary differe ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2022

A non-twisting flux tube for local gyrokinetic simulations

Stephan Brunner, Justin Richard Ball

Local gyrokinetic simulations use a field-aligned domain that twists due to the magnetic shear of the background magnetic equilibrium. However, if the magnetic shear is strong and/or the domain is long, the twist can become so extreme that it fails to prop ...

2021

Effect of the tangential NBI current drive on the stability of pressure and energetic particle driven MHD modes in LHD plasma

Wilfred Anthony Cooper, Joao Varela

The aim of the present study is to analyze the stability of the pressure gradient driven modes (PM) and Alfven eigenmodes (AE) in the large helical device (LHD) plasma if the rotational transform profile is modified by the current drive of the tangential n ...

IOP PUBLISHING LTD2020

First demonstration of real-time kinetic equilibrium reconstruction on TCV by coupling LIUQE and RAPTOR

Olivier Sauter, Jean-Marc Moret, Federico Alberto Alfredo Felici, Antoine Pierre Emmanuel Alexis Merle, Cristian Galperti, Francesco Carpanese

Kinetic equilibrium reconstruction (KER) in tokamaks is the solution of the free-boundary MHD equilibrium that best fits the external magnetic measurements and the internal plasma profiles as imposed from modeling and/or available internal measurements. In ...

2020

Runaway electron synchrotron radiation in a vertically translated plasma

Basil Duval, Joan Decker, Umar Sheikh, Artur Perek, Gergely Papp

Synchrotron radiation observed from runaway electrons (REs) in tokamaks depends upon the position and size of the RE beam, the RE energy and pitch distributions, as well as the location of the observer. We show experimental synchrotron images of a vertical ...

IOP PUBLISHING LTD2020

Projective multiscale time-integration for electrostatic particle-in-cell methods

Jan Sickmann Hesthaven, Paul Isaac Denis Louis Marie Cazeaux

The simulation of problems in kinetic plasma physics is often challenging due to strongly coupled phenomena across multiple scales. In this work, we propose a wavelet-based coarse-grained numerical scheme, based on the framework of Equation-Free Projective ...

2019

Neoclassical tearing mode seeding by coupling with infernal modes in low-shear tokamaks

Jonathan Graves, Wilfred Anthony Cooper, Federico David Halpern, Daniele Brunetti, Andreas Kleiner

A numerical and an analytical study of the triggering of resistive MHD modes in tokamak plasmas with low magnetic shear core is presented. Flat q profiles give rise to fast growing pressure driven MHD modes, such as infernal modes. It has been shown that i ...

Bristol: IOP Publishing, 20162016

Guiding-centre transformation of the radiation-reaction force in a non-uniform magnetic field

Joan Decker

In this paper, we present the guiding-centre transformation of the radiation reaction force of a classical point charge travelling in a non-uniform magnetic field. The transformation is valid as long as the gyroradius of the charged particles is much small ...

Cambridge University Press2015

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Diffusion magnétique

An analytical solution of the isentropic vortex problem in the special relativistic magnetohydrodynamics

A non-twisting flux tube for local gyrokinetic simulations

Effect of the tangential NBI current drive on the stability of pressure and energetic particle driven MHD modes in LHD plasma

First demonstration of real-time kinetic equilibrium reconstruction on TCV by coupling LIUQE and RAPTOR

Runaway electron synchrotron radiation in a vertically translated plasma

Non-linear modelling of saturated internal and external MHD instabilities in tokamaks

Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Projective multiscale time-integration for electrostatic particle-in-cell methods

Neoclassical tearing mode seeding by coupling with infernal modes in low-shear tokamaks

Guiding-centre transformation of the radiation-reaction force in a non-uniform magnetic field

Graph Chatbot

Chattez avec Graph Search

An analytical solution of the isentropic vortex problem in the special relativistic magnetohydrodynamics

Non-linear modelling of saturated internal and external MHD instabilities in tokamaks

Projective multiscale time-integration for electrostatic particle-in-cell methods

Neoclassical tearing mode seeding by coupling with infernal modes in low-shear tokamaks

A non-twisting flux tube for local gyrokinetic simulations

Effect of the tangential NBI current drive on the stability of pressure and energetic particle driven MHD modes in LHD plasma

Runaway electron synchrotron radiation in a vertically translated plasma

Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Guiding-centre transformation of the radiation-reaction force in a non-uniform magnetic field

First demonstration of real-time kinetic equilibrium reconstruction on TCV by coupling LIUQE and RAPTOR