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Abstract

Plasma equilibrium codes generally solve numerically Grad�Shafranov and Maxwell equations on a tokamak two-dimensional (2D) finite element meshing, assuming a global axial symmetry to compute the poloidal flux and magnetic field everywhere in a meridian plane of the machine. To provide relevant results, this modelling must take into account accurately the plasma limiters, the coils and the iron circuit with a consistent magnetic permeability for machines with iron core.
For a better prediction of optimized pre-magnetization configurations and long discharge analysis with the PROTEUS code, the modelling of the Tore Supra tokamak iron circuit and new plasma facing components has been refined: a new meshing has been built, respecting the limiter positions and the inner surfaces of the iron return arms. The magnetic permeability has been adjusted to minimize errors between the code results and magnetic measurements during special calibration shots, at different levels of iron saturation.
With this new modelling, magnetic configurations with field lower than 1 mT over the whole vacuum vessel have been predicted, and slow plasma position drift during long pulses in preparation to the gigajoule discharges has been confirmed by the PROTEUS code.

Additional information

Authors: HERTOUT P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);PELLETIER T, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SAINT-LAURENT F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);RIMINI F, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BUCALOSSI J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Fusion Engineering and Design (2005), Volume 74, Issues 1-4, Pages 671-677
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.sciencedirect.com/science/journal/09203796
Record Number: 200718999 / Last updated on: 2007-04-02
Category: PUBLICATION
Original language: en
Available languages: en
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