Concept

Bobine Tesla

Publications associées (243)

On The Possibility Of Using A Heavy Ion Beam Probe For Local Poloidal Flux Measurements In A Tokamak

This paper examines the possibility of using the principle of conservation of canonical momentum applied to heavy ion beam orbits to obtain an estimate of the local poloidal flux at the position of ionization in a tokamak plasma. The presence of a nonaxisy ...

2011

Poly-Phased Matrix Converter - A 27 input phases to 3 output phases experimental set-up running with hard and soft commutations

Alfred Rufer, Antoine Béguin

This paper presents an experimental set-up of a 27 phases input to 3 phases output Poly-Phased Matrix Converter (27x3 PPMC) realised for the real time experimentation of the dedicated control electronics. When the original converter system is dedicated to ...

Ieee2011

Microfrabricated Mirrors For Space Applications

Nico de Rooij, Caglar Ataman, Wilfried Noell, Sébastien Lani, Dara Zaman Bayat, Benedikt Guldimann

We report on the advances towards the design and fabrication of a system consisting or two 10mm mirrors, one actuated magnetically and the other electrostatically. The system will be used for beam steering. The maximum resonant frequencies and deflection a ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2011

Reactive Power Imbalances in LC VCOs and their Influence on Phase Noise Mechanisms

Adil Koukab

Phase-noise mechanisms in cross-coupled LC voltage-controlled oscillators (VCOs) are reviewed based on a physical understanding of reactive power imbalances in the tank and in the active part. These phenomena are proven to be the predominant phase-noise de ...

2011

Diffusion Tensor Echo Planar Imaging Using Surface Coil Transceiver with a Semiadiabatic RF Pulse Sequence at 14.1T

Rolf Gruetter, Yohan Van de Looij, Nicolas Kunz

Diffusion magnetic resonance studies of the brain are typically performed using volume coils. Although in human brain this leads to a near optimal filling factor, studies of rodent brain must contend with the fact that only a fraction of the head volume ca ...

Wiley-Blackwell2011

Response of a resistive and rotating tokamak to external magnetic perturbations below the Alfvén frequency

Holger Reimerdes

Motivated by the recent experimental observation that plasma stability can be improved by external magnetic perturbations, the general problem of plasma response to external magnetic perturbations is investigated. Different (vacuum, ideal and resistive) pl ...

2011

Macroscopic Stability of High Beta MAST plasmas

Jonathan Graves, Wilfred Anthony Cooper

The high-beta capability of the spherical tokamak, coupled with a suite of world-leading diagnostics on MAST, has facilitated significant improvements in the understanding of performance-limiting core instabilities in high performance plasmas. For instance ...

IOP2011

Optimization of Shielded PCB Air-Core Toroids for High-Efficiency DC-DC Converters

Maher Kayal, Stefano Michelis, Federico Faccio

The paper describes the design of optimized printed circuit board (PCB) air-core toroids for high-frequency dc-dc converters with strict requirements in terms of volume and noise. The effect of several design parameters on the overall inductor volume, on d ...

2011

Active excitation and damping rate measurement of intermediate-n Toroidal Alfvén Eigenmodes in JET, C-Mod and MAST plasmas

Ambrogio Fasoli, Duccio Testa, Theodoros Panis

The stability properties of Alfvén Eigenmodes (AEs) are investigated directly using external antenna excitation and detection of stable modes in a variety of plasma configurations in different devices. Dedicated methods to measure the AE damping rate separ ...

2010

A 3D multi-mode geometry-independent RMP optimization method and its application to TCV

Yves Martin, Jean-Marc Moret, Jonathan Rossel

Resonant magnetic perturbation (RMP) and error field correction (EFC) produced by toroidally and poloidally distributed coil systems can be optimized if each coil is powered with an independent power supply. A 3D multi-mode geometry-independent Lagrange me ...

IOP2010

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