Publications associées à Characterization of impurities in L- and H-modes created by divertor biasing and plasma triangularity in TdeV

Ionization Waves Enhance the Production of X-rays during Streamer Collisions

Experimental data show that in laboratory sparks, X-rays are produced in time synchronization with the meeting of streamers of opposite polarity just before the final breakdown of the discharge gap. It has been suggested that the electric field enhancement ...

2021

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

Harshita Raj, Ankit Kumar, Abhijit Sen, Rohit Kumar, Sameer Kumar

The influence of background plasma poloidal rotation on the rotation frequency of the m/n = 2/1 drift tearing mode (DTM) has been studied in ADITYA-U tokamak. The poloidal rotation velocity of the background plasma in the ion diamagnetic direction is incre ...

2021

TCV heating and divertor upgrades

Ambrogio Fasoli, Basil Duval, Jean-Marc Moret, Stefano Alberti, Holger Reimerdes, Christian Gabriel Theiler, Alexander Karpushov, Matthieu Toussaint, Marcelo Baquero Ruiz, Dario Vaccaro

The operational range and the reactor relevance of the TCV experiments are being enhanced by two sets of major upgrades. The first includes the installation of neutral beam injection (NBI) and new electron cyclotron (EC) auxiliary heating sources, to reach ...

IOP PUBLISHING LTD2020

Observation of Alfvén Eigenmodes driven by off-axis neutral beam injection in the TCV tokamak

Olivier Sauter, Basil Duval, Duccio Testa, Alexander Karpushov, Marcelo Baquero Ruiz, Matteo Vallar, Claudio Marini, Filippo Bagnato, Lorenzo Stipani

Fast-particle driven Alfv´en Eigenmodes have been observed in low-collisionality discharges with off-axis neutral beam injection (NBI), electron cyclotron resonance heating (ECRH) and a reduced toroidal magnetic field. During NBI and ECRH, toroidicity indu ...

2020

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

Real-time applications of Electron Cyclotron Emission interferometry for disruption avoidance during the plasma current ramp-up phase at JET

Data produced by an electron cyclotron interferometer diagnostic are now available to the real-time control systems of of the joint European torus (JET) tokamak. The data consist of absolutely calibrated electron temperature profiles, covering the plasma l ...

2020

Separating the effects of heating and current drive on NTM evolution in TCV

Olivier Sauter, Federico Alberto Alfredo Felici, Mengdi Kong

Neoclassical Tearing Modes (NTMs) are widely observed in tokamak plasmas. They have a detrimental effect on plasma confinement and may even lead to disruptions. Therefore it is important to understand the evolution of NTMs, which is influenced by several e ...

2019

Geodesic acoustic mode evolution in L-mode approaching the L-H transition on JET

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Stefano Coda, Jonathan Graves, Yves Martin, Duccio Testa, Patrick Blanchard, Alessandro Pau, Cristian Sommariva, Henri Weisen, Richard Pitts, Yann Camenen, Jan Horacek, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, Yao Zhou, David Pfefferlé, Davide Galassi, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Hamish William Patten, Samuel Lanthaler, Bernhard Sieglin, Otto Asunta

Geodesic acoustic modes (GAMs) may generate strong oscillations in the radial electric field and therefore are considered as a possible trigger mechanism for the L-H transition. This contribution focuses on the characterization of GAMs in JET plasmas when ...

2019

Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Stefano Coda, Jonathan Graves, Yves Martin, Duccio Testa, Patrick Blanchard, Alessandro Pau, Cristian Sommariva, Henri Weisen, Richard Pitts, Yann Camenen, Jan Horacek, Javier García Hernández, Marco Wischmeier, Nicola Vianello, Mikhail Maslov, Federico Nespoli, Yao Zhou, David Pfefferlé, Davide Galassi, Antonio José Pereira de Figueiredo, Jonathan Marc Philippe Faustin, Liang Yao, Dalziel Joseph Wilson, Hamish William Patten, Samuel Lanthaler, Bernhard Sieglin, Otto Asunta

The recently developed Monte-Carlo code ERO2.0 is applied to the modelling of limited and diverted discharges at JET with the ITER-like wall (ILW). The global beryllium (Be) erosion and deposition is simulated and compared to experimental results from pass ...

ELSEVIER2019

Comparison of runaway electron generation parameters in small, medium-sized and large tokamaks-A survey of experiments in COMPASS, TCV, ASDEX-Upgrade and JET

Basil Duval, Stefano Coda, Yves Martin, Joan Decker, Gergely Papp, Giovanni Tardini

This paper presents a survey of the experiments on runaway electrons (RE) carried out recently in frames of EUROFusion Consortium in different tokamaks: COMPASS, ASDEX-Upgrade, TCV and JET. Massive gas injection (MGI) has been used in different scenarios f ...

Iop Publishing Ltd2018

Characterization of impurities in L- and H-modes created by divertor biasing and plasma triangularity in TdeV

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Ionization Waves Enhance the Production of X-rays during Streamer Collisions

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

TCV heating and divertor upgrades

Observation of Alfvén Eigenmodes driven by off-axis neutral beam injection in the TCV tokamak

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Real-time applications of Electron Cyclotron Emission interferometry for disruption avoidance during the plasma current ramp-up phase at JET

Separating the effects of heating and current drive on NTM evolution in TCV

Geodesic acoustic mode evolution in L-mode approaching the L-H transition on JET

Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0

Comparison of runaway electron generation parameters in small, medium-sized and large tokamaks-A survey of experiments in COMPASS, TCV, ASDEX-Upgrade and JET

Observation of Alfvén Eigenmodes driven by off-axis neutral beam injection in the TCV tokamak

Ionization Waves Enhance the Production of X-rays during Streamer Collisions

Controlling the rotation of drift tearing modes by biased electrode in ADITYA-U tokamak

Real-time applications of Electron Cyclotron Emission interferometry for disruption avoidance during the plasma current ramp-up phase at JET

Separating the effects of heating and current drive on NTM evolution in TCV

Geodesic acoustic mode evolution in L-mode approaching the L-H transition on JET

TCV heating and divertor upgrades

Comparison of runaway electron generation parameters in small, medium-sized and large tokamaks-A survey of experiments in COMPASS, TCV, ASDEX-Upgrade and JET

Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0

Experimental verification of X-point potential well formation in unfavorable magnetic field direction