The Open FUSION Toolkit: An open-source suite of fusion modeling tools for engineering, analysis, and education*

The Open FUSION Toolkit¹ is an open-source suite of tools for fusion modeling with a focus on ease of use, tight integration with engineering workflows, and education. The present suite of physics tools include: 1) TokaMaker²: a 2D static and time-dependent Grad-Shafranov equilibrium tool designed as an user-friendly and open tool for design, control development and education, 2) ThinCurr³: a 3D thin-wall current modeling tool used to study currents in 3D device structures (eg. ports) and as an alternative to fourier-based current potential formulations in stellarator coil optimization, 3) MUG⁴: a 3D linear/nonlinear time-dependent MHD tool for plasma dynamics in arbitrary domains, and 4) Marklin⁵: a 3D force-free, uniform λ ideal MHD equilibrium solver. A common core provides capabilities to all tools, including: meshing from CAD models, scalable linear and nonlinear solvers, extensible finite element representations, parallelization via OpenMP+MPI, and 3D visualization. Core functionality is implemented in C/C++/Fortran with Python interfaces for interactive applications and scripting. This poster will present updates and plans for development and application of the Open FUSION Toolkit.

[1] https://github.com/hansec/OpenFUSIONToolkit

[2] C. Hansen et al., CPC 298 109111 (2024)

[3] A. Battey et al., NF 64 016010 (2024)

[4] C. Hansen, PoP 22 042505 (2015)

[5] T. Benedett, NF 61 036022 (2021)