Publications de Roland Behn | EPFL Graph Search

ELM-induced cold pulse propagation in ASDEX Upgrade

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Duccio Testa, Patrick Blanchard, Holger Reimerdes, Benoît Labit

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the pl ...

2019

A locked mode indicator for disruption prediction on JET and ASDEX upgrade

Olivier Sauter, Basil Duval, Ambrogio Fasoli, Stefano Coda, Timothy Goodman, Yves Martin, Jonathan Graves, Jean-Marc Moret, Patrick Blanchard, Holger Reimerdes

The aim of this paper is to present a signal processing algorithm that, applied to the raw Locked Mode signal, allows us to obtain a disruption indicator in principle exploitable on different tokamaks. A common definition of such an indicator for different ...

2019

Validation of the ICRF antenna coupling code RAPLICASOL against TOPICA and experiments

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Duccio Testa, Patrick Blanchard, Bruno Marchand, Holger Reimerdes

In this paper we validate the finite element code RAPLICASOL, which models radiofrequency wave propagation in edge plasmas near ICRF antennas, against calculations with the TOPICA code. We compare the output of both codes for the ASDEX Upgrade 2-strap ante ...

IOP Publishing Ltd2019

Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Duccio Testa, Patrick Blanchard, Holger Reimerdes, Benoît Labit

Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat and particle loads on the wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research on ASDEX Upgrade ...

IOP Publishing Ltd2017

Threshold power for the transition into H-mode for H, D, and He plasmas in TCV

Basil Duval, Yves Martin, Benoît Labit, Laurie Porte, Alexander Karpushov, Roland Behn

The threshold power for the transition into H-mode with hydrogen (H), deuterium (D), and helium (He) as majority ion species has been evaluated from a series of dedicated experiments on the tokamak TCV. Identical plasma configurations with a single-null X- ...

Iop Publishing Ltd2015

High density experiments in TCV ohmically heated and L-mode plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Benoît Labit, Laurie Porte, Alexander Karpushov, Antoine Pochelon, Roland Behn

Recent experiments have been performed on the Tokamak a configuration variable (TCV) to investigate the confinement properties of high density plasmas and the mechanism behind the density limit. In a limiter configuration with plasma elongation kappa = 1.3 ...

Iop Publishing Ltd2015

On the non-stiffness of edge transport in L-mode tokamak plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Stephan Brunner, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Yann Camenen, Roland Behn, Doohyun Kim

Transport analyses using first-principle turbulence codes and 11/2-D transport codes usually study radial transport properties between the tokamak plasma magnetic axis and a normalized minor radius around 0.8. In this region, heat transport shows significa ...

Amer Inst Physics2014

H-mode access during plasma current ramp-up in TCV

Yves Martin, Ivo Furno, Holger Reimerdes, Benoît Labit, Roland Behn

A recent TCV experiment has investigated the dependence of the L H transition threshold power on the plasma current ramp-rate and the X-point height above the divertor target, which both have previously been seen to affect the transition behaviour. Systema ...

Iop Publishing Ltd2014

Electron temperature and density profile evolution during the ELM cycle in ohmic and EC-heated H-mode plasmas in TCV

Olivier Sauter, Basil Duval, Laurent Villard, Laurie Porte, Roland Behn, János Márki, Andreas Pitzschke

2012

Dependence of L-mode confinement on the electron cyclotron power deposition profile in the TCV tokamak

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Benoît Labit, Alexander Karpushov, Antoine Pochelon, Roland Behn, Loïc Curchod, Mikael Rancic

Institute of Physics2012