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Science and technology research and development in support to ITER and the Broader Approach at CEA

Xiaoxia Bai, Alexis Berne, Jonathan Bastien Cottet, Joan Decker, Javier García Hernández, Daniel Keller, Yiming Li, Jonathan Bryan Lister, Fang Liu, Vincent Martin, Nicolas Mellet, Antoine Pierre Emmanuel Alexis Merle, Louis Nicolas, Hui Wang, Yi Zhang

In parallel to the direct contribution to the procurement phase of ITER and Broader Approach, CEA has initiated research & development programmes, accompanied by experiments together with a significant modelling effort, aimed at ensuring robust operation, plasma performance, as well as mitigating the risks of the procurement phase. This overview reports the latest progress in both fusion science and technology including many areas, namely the mitigation of superconducting magnet quenches, disruption-generated runaway electrons, edge-localized modes (ELMs), the development of imaging surveillance, and heating and current drive systems for steady-state operation. The WEST (W Environment for Steady-state Tokamaks) project, turning Tore Supra into an actively cooled W-divertor platform open to the ITER partners and industries, is presented.

Iop Publishing Ltd2013

Eléments d'acoustique générale

Vincent Martin

Ce manuel d’enseignement présente les principaux éléments de l’acoustique physique. Une approche didactique a été privilégiée, les thèmes présentés étant abordés par le biais d’une description d’objets courants extraits par exemple de la lutherie, de l’environnement, de l’industrie ou de la physiologie. L’auteur introduit par ailleurs quelques méthodes numériques nécessaires à la résolution de problèmes plus complexes, tout en mettant l’accent à l’aide de calculs élémentaires sur les bases essentielles de cette discipline. Cet ouvrage regroupe ainsi dans un ensemble cohérent et synthétique les bases physiques et numériques de l’acoustique et il sensibilise le lecteur à divers problèmes d’optimisation illustrés de cas pratiques.

Presses Polytechniques et Universitaires Romandes2007

Graft of the boundary integral method onto the image-source method for vehicle acoustics

Thomas Guignard, Vincent Martin

The solution obtained with the acoustical image sources method was shown to be the contribution of terms issued from a series development of the integral method (believed to be the exact solution). Missing terms in the geometrical method represent, among others, the contribution of diffraction. Taking all of them into account would indeed lead back to the full integral method. Alternatively, would it be possible to consider only a subset of these terms, therefore adding missing information to the geometrical method? This would bring the latter to its much-awaited role in the medium-frequency range.

2007