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Benoît Labit

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Publications associées (155)

Theory-based scaling of the SOL width in circular limited tokamak plasmas

Gilles Arnoux, Ivo Furno, Sébastien Jolliet, Jan Horacek, Benoît Labit, Joaquim Loizu Cisquella, Paolo Ricci, Annamaria Mosetto, Federico David Halpern

A theory-based scaling for the characteristic length of a circular, limited tokamak scrape-off layer (SOL) is obtained by considering the balance between parallel losses and non-linearly saturated resistive ballooning mode turbulence driving anomalous perp ...

IOP Publishing Ltd2013

Bifurcated Helical Core Equilibrium States in Tokamaks

Wilfred Anthony Cooper, Basil Duval, Antoine Pochelon, Olivier Sauter, Holger Reimerdes, Stefano Coda, Jonathan Rossel, Jonathan Graves, Benoît Labit, David Pfefferlé, Mattia Albergante, Federico David Halpern, Daniele Brunetti

Tokamaks with weak to moderate reversed central shear in which the minimum rotational transform

q_{min}

is in the neighbourhood of unity can trigger bifurcated MagnetoHydrodynamic (MHD) equilibrium states, one of which is similar to a saturated ideal ...

2012

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

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

Institute of Physics2012

Recent TCV results – innovative plasma shaping to improve plasma properties and insight

Stephan Brunner, Basil Duval, Timothy Goodman, Jean-Marc Moret, Antoine Pochelon, Olivier Sauter, Laurent Villard, Holger Reimerdes, Stefano Coda, Alberto Bottino, Sébastien Jolliet, Jonathan Rossel, Alexander Karpushov, Laurie Porte, Paolo Angelino, Benoît Labit, Alessandro Marinoni, Mikael Rancic, Andreas Pitzschke, Dávid Wágner, David Nicholas Wagner

2012

Helical core tokamak MHD equilibrium states

Wilfred Anthony Cooper, Basil Duval, Antoine Pochelon, Olivier Sauter, Holger Reimerdes, Stefano Coda, Jonathan Rossel, Jonathan Graves, Benoît Labit, Mattia Albergante

Bifurcated magnetohydrodynamic tokamak equilibrium states with axisymmetric or helical core structure are computed. When a peaked pressure profile is chosen, the helical core structures appear like the {em snakes} that are observed in the JET tokamak. They ...

Caroline Wilkinson2011

Three-Dimensional Imaging of a Radially Propagating Plasma Blob Using Conditional Sampling Techniques

Ambrogio Fasoli, Ivo Furno, Benoît Labit, Christian Gabriel Theiler

We present 3-D imaging of plasma blobs, generated from ideal interchange turbulence in the TORPEX device, obtained by applying different conditional sampling techniques to electrostatic probe data. Time-evolving spatial profiles of electron density, temper ...

2011

Blob-induced toroidal momentum transport in simple magnetized plasmas

Ambrogio Fasoli, Ivo Furno, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

The link between toroidal flows and density blobs is experimentally demonstrated in TORPEX simple magnetized plasmas: momentum is transferred from an ideal-interchange mode to density blobs. The phase shift between the toroidal flow and the density perturb ...

American Institute of Physics (AIP)2011

Blob motion and control in simple magnetized plasmas

Ambrogio Fasoli, Ivo Furno, Benoît Labit, Davoud Iraji, Paolo Ricci, Christian Gabriel Theiler

The radial propagation of plasma blobs and possibilities of influencing it are investigated in the TORPEX toroidal experiment [Fasoli et al., Phys. Plasmas 13, 055902 (2006)]. The effect of changing the connection length and the neutral background pressure ...

American Institute of Physics (AIP)2011

Electrostatic instabilities, turbulence and fast ion interactions in the TORPEX device

Ambrogio Fasoli, Ivo Furno, Stefan Müller, Mario Ludovico Podesta, Francesca Maria Poli, Lucia Isabel Federspiel, Benoît Labit, Joaquim Loizu Cisquella, Alice Burckel, Gennady Plyushchev, Davoud Iraji, Paolo Ricci, Christian Gabriel Theiler, Kyle Gustafson

Electrostatic turbulence, related structures and their effect on particle, heat and toroidal momentum transport are investigated in TORPEX simple magnetized plasmas using high-resolution diagnostics, control parameters, linear fluid models and nonlinear nu ...

Institute of Physics2010

"Snowflake" H Mode in a Tokamak Plasma

Basil Duval, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Benoît Labit, János Márki, Andreas Pitzschke, Francesco Piras

An edge-localized mode (ELM) H-mode regime, supported by electron cyclotron heating, has been successfully established in a snowflake (second-order null) divertor configuration for the first time in the TCV tokamak. This regime exhibits 2 to 3 times lowe ...

The American Physical Society2010

Snowflake divertor experiments on TCV

Basil Duval, Jean-Marc Moret, Olivier Sauter, Stefano Coda, Benoît Labit, János Márki, Andreas Pitzschke, Francesco Piras

An ELMy H-mode 'snowflake' (SF) divertor is established and studied for the first time in the TCV tokamak. The H-mode access and the edge localized mode (ELM) dynamics are compared with a conventional single-null diverted configuration. The SF configuratio ...

Institute of Physics2010

Langmuir probe-based observables for plasma-turbulence code validation and application to the TORPEX basic plasma physics experiment

Ambrogio Fasoli, Ivo Furno, Stefan Müller, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

The methodology for plasma-turbulence code validation is discussed, with focus on the quantities to use for the simulation-experiment comparison, i.e., the validation observables, and application to the TORPEX basic plasma physics experiment [A. Fasoli , P ...

American Institute of Physics (AIP)2009

Cross-field plasma blob motion in an open magnetic field line configuration

Ambrogio Fasoli, Ivo Furno, Stefan Müller, Benoît Labit, Gennady Plyushchev, Paolo Ricci, Christian Gabriel Theiler

The radial propagation of blobs generated from plasma instabilities is investigated in an open magnetic field line configuration. Blob cross-field velocities and sizes are obtained from internal probe measurements using pattern recognition. By varying the ...

APS2009

Cross-field transport by instabilities and blobs in a magnetized toroidal plasma

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

The mechanisms for anomalous transport across the magnetic field are investigated in a toroidal magnetized plasma. The role of plasma instabilities and macroscopic density structures (blobs) is discussed. Examples from a scenario with open magnetic field l ...

2008

Dynamics of plasma blobs in a shear flow

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Benoît Labit, Christian Gabriel Theiler

2008

Experimental Observation of the Blob-Generation Mechanism from InterchangeWaves in a Plasma

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

The mechanism for blob generation in a toroidal magnetized plasma is investigated using time-resolved measurements of two-dimensional structures of electron density, temperature, and plasma potential. The blobs are observed to form from a radially elongate ...

2008

Two-dimensional time resolved measurements of toroidal velocity correlated with density blobs in magnetized plasmas

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Benoît Labit

2008

The role of the density gradient on intermittent cross-field transport events in a simple magnetized toroidal plasma

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

Intermittent cross-field particle transport events (ITEs) are studied in the basic toroidal device TORPEX [TORoidal Plasma EXperiment, A. Fasoli et al., Phys. Plasmas 13, 055902 (2006)], with focus on the role of the density gradient. ITEs are due to the i ...

American Institute of Physics (AIP)2008

Mechanism for blob generation in the TORPEX toroidal plasma

Stephan Brunner, Ambrogio Fasoli, Ivo Furno, Jonathan Graves, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Paolo Ricci, Christian Gabriel Theiler

The mechanism for blob generation is detailed in the toroidal magnetized plasma of the TORPEX device [ Fasoli et al., Phys. Plasmas 13, 055902 (2006) ] using an experimental configuration, which features a plasma region dominated by a coherent wave and a r ...

2008

Experimental investigation of blob physics in the TORPEX toroidal plasma

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Benoît Labit

2007

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