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Impact of the new TCV baffled divertor upgrade on pedestal structure and performance

Publications associées (32)

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Plasma wall interaction and its implication in an all tungsten divertor tokamak

Yves Martin, Alexandre Schmid, Marco Wischmeier, Alberto Bottino, Andrea Scarabosio, Dávid Wágner, Heinz Mueller, Hartmut Zohm, Emanuele Poli, Adriano Manini, Giovanni Tardini

ASDEX Upgrade has recently finished its transition towards an all-W divertor tokamak, by the exchange of the last remaining graphite tiles to W-coated ones. The plasma start-up was performed without prior boronization. It was found that the large He conten ...

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

The role of the radial electric field for the transition to high confinement regimes

Duccio Testa

The radial electric field E-r(x, t), and particularly its gradient, has been invoked by various theories and empirical models as a crucial parameter 'per se' for determining the transition to high confinement regimes, such as the onset of an internal trans ...

2006

Measurement of edge electrostatic turbulence in the TCV tokamak plasma boundary

Jan Horacek

Almost since the first density profile measurements were made in the scrape-off layer (SOL) of the early tokamaks, it has been recognized that the rate of particle transport perpendicular to magnetic surfaces exceeds that expected on the basis of classical ...

EPFL2006

Simulating divertor detachment in the TCV and JET tokamaks

Marco Wischmeier

Divertor detachment is currently assumed to be a fundamental pre-requisite for the successful operation of future fusion reactors. Only by partially detaching the divertor in the regions of highest power flux density can high performance tokamak operation ...

EPFL2005

Overview of transport, fast particle and heating and current drive physics using tritium in JET plasmas

Henri Weisen

Results are presented from the JET Trace Tritium Experimental (TTE) campaign using minority tritium (T) plasmas (n(T)/n(D) < 3%). Thermal tritium particle transport coefficients (D-T, nu(T)) are found to exceed neo-classical values in all regimes, except i ...

2005

A variety of techniques are being tested on ASDEX Upgrade for avoiding or reducing the divertor energy load caused by ELMs. Quiescent H-mode operation has been improved by operation with recently boronized vessel walls. Z(eff) values in QH-modes are now si ...

2004

Advanced tokamak regimes obtained in ASDEX Upgrade, DIII-D, FF-U, JET, JT-60U, TCV and Tore Supra experiments are assessed both in terms of their fusion performance and capability for ultimately reaching steady-state using data from the international inter ...

2004

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET)

Olivier Sauter

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy confinement time as predicted by the International Thermonuclear E ...

2002

ELM moderation with ICRF heating on JET

Olivier Sauter

A high-density, ELM-free, 'enhanced Dalpha' (EDA) H-mode has been demonstrated with Ohmic or RF heating on the Alcator C-Mod device. An allied 'low particle confinement' H-regime was also observed previously in 'Mk0' divertor experiments on JET. Initial at ...

2002