FLIPEC, an ideal MHD free-boundary axisymmetric equilibrium solver in the presence of macroscopic flows Articles uri icon

publication date

  • June 2024

start page

  • 1

end page

  • 16

issue

  • 8

volume

  • 64

International Standard Serial Number (ISSN)

  • 0029-5515

Electronic International Standard Serial Number (EISSN)

  • 1741-4326

abstract

  • The most relevant features of FLIPEC (Free fLow Iterative Plasma Equilibrium Code) are presented. This new code iteratively calculates free-boundary, axisymmetric ideal MHD equilibria with arbitrary poloidal and toroidal plasma flows. FLIPEC is a mature code that has emerged from a complete overhaul of a previous version (F-Torija Daza 2022 et alNucl. Fusion62 126044). It uses a (inverse) curvilinear coordinate representation for the Grad-Shafranov-Bernoulli equation system, which allows FLIPEC to extend its free-boundary capabilities to arbitrary plasma shapes and removes many limitations with regards to the distance between plasma and external coils. Run-time stabilization of vertical modes has also been implemented by means of artificial feedback coils. Finally, active targeting schemes have also been included. These capabilities are illustrated on two very different cases: the ITER tokamak baseline configuration and a NSTX spherical tokamak equilibrium.

subjects

  • Physics

keywords

  • ideal mhd; plasma flows; free-boundary equilibrium; grad–shafranov–bernoulli equations; iterative solvers; curvilinear coordinates; run-time control and targeting