REAL-TIME EQUILIBRIUM RECONSTRUCTION IN A TOKAMAK

Journal Article · Wed Mar 12 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2905108· OSTI ID:21136809

Blum, Jacques; Boulbe, Cedric; Faugeras, Blaise ^[1]

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1. Laboratoire J.-A. Dieudonne (UMR 6621) Universite de Nice Sophia-Antipolis, CNRS Parc Valrose 06108 Nice Cedex 02 (France)

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.

• OSTI ID: 21136809
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 988; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALGORITHMS
AXIAL SYMMETRY
CURRENT DENSITY
ELECTRIC CURRENTS
FINITE ELEMENT METHOD
GRAD-SHAFRANOV EQUATION
LEAST SQUARE FIT
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
OPTIMIZATION
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PRESSURE MEASUREMENT
STARK EFFECT
TOKAMAK DEVICES