TokaGLINT: A Scalable GPU-Tailored Implicit Solver for Full 3D Tokamak Electromagnetic Simulations

TokaGLINT is a GPU-accelerated implicit solver designed for electromagnetic field computations in full 3D tokamak simulations. Its central innovation lies in the co-design of hierarchical domain decomposition and a fast exact local solver, where hierarchical partitioning is tailored to match fine-grained intra-card subdomains. The approach exploits tensor-based solvers dedicated to curvilinear-coordinate symplectic CN-FDTD-discretized 3D Maxwell equations for efficient large-scale parallel GPU computing.