Full-shot DIII-D modeling with the FUSE framework

The FUSE framework (http://fuse.help) has been extended to self-consistently model the dynamic evolution of both plasma and auxiliary systems, enabling realistic time-dependent simulations in both feedforward and feedback control modes. Applied to DIII-D, FUSE now supports full-discharge simulations for retrospective analysis and predictive scenario planning. With neural-network acceleration, high-fidelity predictive shot-scale simulations complete in tens of seconds: fast enough to support scientists in between-shot decision-making in the control room. FUSE also functions as a virtual tokamak for co-simulation with control systems: integrated simulations with the TokSys suite have already been demonstrated for ITER plasmas, and coupling to the DIII-D plasma control system is actively underway. This capability opens the door to advanced pulse planning by physics operators and forms the foundation for "flight simulator" functionality, helping to validate, optimize, and de-risk high-performance scenarios for present-day tokamaks and future fusion pilot plants.