TokaMaker: An open-source time-dependent Grad-Shafranov tool for the design and modeling of axisymmetric fusion devices

• DOI: 10.48550/arxiv.2311.07719
• Publication Date: 2023-01-01
• Authors: C. Hansen; I. G. Stewart; D. Burgess; M. Pharr; S. Guizzo; F. Logak; A. Nelson; C. Paz-Soldan
• Keywords: Python; Fortran; Code (set theory)

In this paper, we present a new static and time-dependent MagnetoHydroDynamic (MHD) equilibrium code, TokaMaker, for axisymmetric configurations of magnetized plasmas, based on the well-known Grad-Shafranov equation. This code utilizes finite element methods an unstructured triangular grid to enable capturing accurate machine geometry simple mesh generation from engineering-like descriptions future devices. The is designed ease use without sacrificing capability speed through combination Python, Fortran, C/C++ components. A detailed description numerical including novel formulation boundary conditions free-boundary equilibria, validation implementation those using both analytic test cases cross-code shown. Results show expected convergence across tested polynomial orders cases.