Concept

Magnetic reconnection

Related publications (499)

First principles based simulations of instabilities and turbulence

Olivier Sauter, Laurent Villard, Trach-Minh Tran, Alberto Bottino, Paolo Angelino

It is now widely believed that low frequency turbulence developing from smallscale instabilities is responsible for the phenomenon of anomalous transport generally observed in magnetic confinement fusion experiments. The microinstabilities are driven by gr ...

Institute of Physics2004

Frequency control of type-I ELMs by magnetic triggering in ASDEX Upgrade

Yves Martin, Jonathan Bryan Lister, Hartmut Zohm

Magnetic triggering of edge localized modes (ELMs) was reported first from TCV in ohmic plasmas showing type-III ELMs. This method, showing successful locking of the ELM frequency to an imposed vertical plasma oscillation, has now also been demonstrated in ...

2004

Monitoring Alfven cascades with interferometry on the JET Tokamak

Duccio Testa

A microwave interferometry technique is applied for the first time for detecting a discrete spectrum of Alfven cascade (AC) eigenmodes excited with fast ions in reversed magnetic shear plasmas of the Joint European Torus. The interferometry measurements of ...

2004

Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Yann Camenen, Petri Nikkola

Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly (similar or equal to3 ms), during a slow (similar ...

2004

A comparison of experimental measurements and code results to determine flows in the JET SOL

Richard Pitts

Two reciprocating probe systems, at the same poloidal position at the top of the JET torus but toroidally separated by 180degrees, have been used to measure parallel flow in the scrape-off layer (SOL) of lower single-null, diverted plasmas. One system uses ...

2004

Hybrid advanced scenarios: perspectives for ITER and new experiments with dominant RF heating

Olivier Sauter

A 'hybrid' scenario for ITER is defined through its objectives: a large fusion yield for a long time duration. In many tokamaks, discharges characterized by a stationary current density profile, enclosing a large volume of low magnetic shear with q(0) near ...

2004

Effects of a vertical magnetic field on particle confinement in a magnetized plasma torus

Ambrogio Fasoli, Benoît Labit, Mario Ludovico Podesta, Francesca Maria Poli

The particle confinement in a magnetized plasma torus with superimposed vertical magnetic field is modeled and measured experimentally. The formation of an equilibrium characterized by a parallel plasma current canceling out the grad B and curvature drifts ...

2004

ITER-relevant H-mode physics at ASDEX upgrade

Yves Martin, Jonathan Bryan Lister

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

Physics of transport in tokamaks

Henri Weisen, Adriano Manini

This paper is an overview of recent results relating to turbulent particle and heat transport, and to the triggering of internal transport barriers (ITBs). The dependence of the turbulent particle pinch velocity on plasma parameters has been clarified and ...

2004

Bootstrap current and quasi-symmetry in reactor-size stellarators

Wilfred Anthony Cooper, Pavel Popovitch

The impact of the bootstrap current (BC) has become an important issue in the modeling of quasi-symmetric stellarator devices. Magnetohydrodynamic equilibria have been calculated with self-consistent BC in the collisionless l/nu regime for characteristic q ...

2004

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