Concept

Reconnexion magnétique

Publications associées (499)

Electron Bernstein Wave Heating and Emission in the TCV Tokamak

Stefano Coda, Timothy Goodman, Laurie Porte, Antoine Pochelon, Yann Camenen, Loïc Curchod

Electron cyclotron resonance heating (ECRH) of high-density tokamak plasmas is limited because of reflections of the waves at so-called wave cutoffs. Electron Bernstein wave (EBW) heating (EBWH) via a double mode conversion process from ordinary (O)-mode, ...

American Nuclear Society2007

Chapter 8: Plasma operation and control

Jonathan Bryan Lister

The ITER plasma control system has the same functional scope as the control systems in present tokamaks. These are plasma operation scenario sequencing, plasma basic control (magnetic and kinetic), plasma advanced control (control of RWMs, NTMs, ELMs, erro ...

2007

Ideal magnetohydrodynamic stability of the NCSX

Wilfred Anthony Cooper

The ideal magnetohydrodynamic (MHD) stability of the National Compact Stellarator Experiment (NCSX) is extensively analyzed using the most advanced three-dimensional MHD codes. It is shown that the NCSX is stable to finite-n MHD modes, including the vertic ...

2007

The physics of sawtooth stabilization

Stefano Coda, Jonathan Graves

Long period sawteeth have been observed to result in low-beta triggering of neo-classical tearing modes, which can significantly degrade plasma confinement. Consequently, a detailed physical understanding of sawtooth behaviour is critical, especially for I ...

2007

Real time plasma current and elongation control using ECRH actuators

Stefano Coda, Yann Camenen, James Paley

Experiments have been carried out on TCV using Electron Cyclotron Resonance Heating (ECRH) actuators to control the plasma current and elongation in real time. In fully non-inductive plasmas, the plasma current may be driven entirely by ECCD on TCV. By rep ...

2007

Sawtooth behaviour in highly elongated TCV plasmas

Olivier Sauter, Ivo Furno, Holger Reimerdes, Antoine Pochelon, Andrei Martynov

The effect of plasma elongation kappa on the sawtooth behaviour is studied in ohmically heated TCV plasmas up to values of kappa = 2.8. Above a certain value of kappa, which varies from 2.2 to 2.6 and depends on the current profile, the sawtooth oscillatio ...

2006

Temperature oscillating regimes in Tore Supra diagnosed by MHD activity

This paper describes what we can learn on the regimes of spontaneous electron temperature oscillations discovered in Tore Supra from the analysis of MHD activity. Since the first observations of this oscillating behaviour of plasma equilibrium, and its int ...

2006

Reconstruction of the electron distribution function during ECRH/ECCD and magnetic reconnection events in a tokamak plasma

Igor Klimanov

The performance of tokamaks is usually described in terms of plasma temperature, density and confinement time. The term temperature implies that the plasma is in thermal equilibrium and its particles have maxwellian (normal) velocity distribution. However, ...

EPFL2006

Large scale magnetic ﬁelds and coherent structures in nonuniform unmagnetized plasma

Martin Jucker

The properties of streamers and zonal magnetic structures in magnetic electron drift mode turbulence are investigated. The stability of such large scale structures is investigated in the kinetic and the hydrodynamic regime, for which an instability criteri ...

American Institute of Physics2006

A drift-kinetic Semi-Lagrangian 4D code for ion turbulence simulation

Olivier Sauter, Laurent Villard

A new code is presented here, named Gyrokinetic SEmi-LAgragian (GYSELA) code, which solves 4D drift-kinetic equations for ion temperature gradient driven turbulence in a cylinder (r, theta, z). The code validation is performed with the slab ITG mode that o ...

Elsevier2006

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