Concept

Reversed field pinch

Publications associées (331)

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

Test results on the first 50 kA NbTi full size sample for the International Thermonuclear Experimental Reactor

Boris Stepanov

Within the framework of the R&D studies for the International Thermonuclear Experimental Reactor (ITER) project, the first full size NbTi conductor sample was fabricated industrially and tested in the SULTAN facility (Villigen, Switzerland). This sample (P ...

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

Initial active MHD spectroscopy experiments exciting stable Alfven eigenmodes in Alcator C-Mod

Ambrogio Fasoli

A pair of toroidally localized in-vessel antennas in Alcator C-Mod were used to excite and detect stable toroidal Alfven eigenmode (TAE) resonances in the frequency range of 400-500 kHz. By ramping the toroidal field, the plasma TAE frequency was swept thr ...

2004

Effect of current distribution on the voltage-temperature characteristics: study of the NbTiPF-FSJS sample for ITER

Boris Stepanov

Various tests, either on full-size joint samples or on model coils confirmed that current distribution may play a crucial role in the electrical behaviour of CICC in operating conditions. In order to evaluate its influence, CEA developed a code (ENSIC) the ...

2004

Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

Wilfred Anthony Cooper

A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not req ...

2004

Tokamak equilibria with reversed current density

Laurent Villard, Andrei Martynov

Observations of nearly zero toroidal current in the central region of tokamaks (the "current hole") raises the question of the existence of toroidal equilibria with very low or reversed current in the core. The solutions of the Grad-Shafranov equilibrium e ...

2003

Upgrade of the present JET shape and vertical stability controller

Jonathan Bryan Lister

The development of linear model of the present JET (Joint European Torus) electromagnetic system has allowed the design of an optimized Plasma Shape Controller. Quite extreme plasma boundaries (elongation k = 1.9 and triangularity = 0.6) are shown ...

2003

Laser-assisted microstructuring for Ti : sapphire channel-waveguide fabrication

René Salathé, Patrik Willi Hoffmann, Cyrille Hibert

We report on the fabrication of Ti:sapphire channel waveguides. Such channel waveguides are of interest, e.g., as low-threshold tunable lasers. We investigated several structuring methods including ion beam implantation followed by wet chemical etching str ...

2003

Present and perspective roles of soft X-ray tomography in tokamak plasma position measurements

Basil Duval, Jonathan Bryan Lister, Jan Horacek

This paper shows the importance and feasibility of real-time tomography in fusion experiments for the example of soft X-ray (SXR) position measurements. The requirement of non-magnetic real-time diagnostics in low frequencies for ITER is discussed. This is ...

2003

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