A reduced basis approach to plasma equilibrium reconstruction in tokamaks.

• A fast, data-driven algorithm for plasma equilibrium reconstruction based on PCA. • Application to the ITER case. • Analysis of the performance, improvement of the algorithm for critical cases. In this paper, the Proper Orthogonal Decomposition approach is exploited to obtain a Reduced Order Model for the plasma magnetic equilibrium problem, described by the Grad-Shafranov equation. The proposed method is applied over a dataset consisting of a few hundred ITER plasma equilibria, and is applied to the problem of plasma equilibrium reconstruction. [ABSTRACT FROM AUTHOR]