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Abstract

Plasma equilibrium codes solve numerically Grad-Shafranov and Maxwell equations on a twodimensional finite element meshing of a tokamak, assuming a global axial symmetry to compute the poloidal magnetic field everywhere in a meridian plane of the machine. To provide relevant results, this modelling must take into account accurately the plasma facing components, and the iron circuit, with a consistent magnetic permeability, for machines with iron core.
For a better prediction of optimised pre-magnetization configurations and long discharge analysis with the PROTEUS code [1], 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 plasma slow derive during long pulses in preparation to the gigajoule discharges has been confirmed by the PROTEUS code.

Additional information

Authors: HERTOUT P, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SAINT-LAURENT F, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);RIMINI F, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);PELLETIER T, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 23rd Symposium on Fusion Technology Organised by: Consorzio RFX (IT) Held at: Fondazione Cini, Venice (IT)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200417731 / Last updated on: 2004-11-02
Category: PUBLICATION
Original language: en
Available languages: en
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