REAL-TIME EQUILIBRIUM RECONSTRUCTION IN A TOKAMAK

Authors :: Jacques Blum
Cédric Boulbe
Blaise Faugeras
Giuseppe Gorini
Francesco P. Orsitto
Elio Sindoni
Marco Tardocchi
Laboratoire Jean Alexandre Dieudonné (JAD)
Université Nice Sophia Antipolis (... - 2019) (UNS)
COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)
F.P. Orsitto
G. Gorini
E. Sindoni
M. Tardocchi
Source :: BURNING PLASMA DIAGNOSTICS, Burning Plasma Diagnostics: An International Conference, Burning Plasma Diagnostics: An International Conference, Sep 2007, Varenna, Italy. p 420-429, ⟨10.1063/1.2905108⟩
Publication Year :: 2008
Publisher :: AIP, 2008.
Abstract: International audience; This paper deals with the numerical reconstruction of the plasma current density in a Tokamak and of its equilibrium. The problem consists in the identification of a non-linear source in the 2D Grad-Shafranov equation, which governs the axisymmetric equilibrium of a plasma in a Tokamak. The experimental measurements that enable this identification are the magnetics on the vacuum vessel, but also polarimetric and interferometric measures on several chords, as well as motional Stark effect or pressure measurements. The reconstruction can be obtained in real-time using a finite element method, a non-linear fixed-point algorithm and a least-square optimization procedure.