On January 6th, 2026 Commonwealth Fusion Systems (CFS) announced collaborations with NVIDIA and Siemens to develop a digital twin of their SPARC fusion machine.
Digital Rendering of the SPARC Fusion Machine, Source: Commonwealth Fusion Systems
This collaboration aligns with the expanded strategic partnership between NVIDIA and Siemens, announced on January 6th, 2026. The two companies are working together to create industrial and physical AI applications across all industries and industrial workflows, now explicitly including fusion technology.
NVIDIA will contribute its AI infrastructure, simulation libraries, models, frameworks, and blueprints. Complementing this, Siemens will offer its industrial and manufacturing expertise, AI specialists, and advanced hardware and software solutions.
The digital twin will use Siemens Xcelerator industrial software portfolio. Additionally, CFS will use Siemens' Designcenter NC for advanced product engineering and Teamcenter for product lifecycle management. CFS plans to leverage these Siemens digital tools to enhance the efficiency of its manufacturing processes and overall operations at its Devens, Massachusetts factory.
CFS will use NVIDIA Omniverse libraries and OpenUSD to integrate data with classical and AI-powered physics models to create the digital twin of SPARC. The digital twin will provide an easy way to run simulation, test hypotheses, and quickly compare experimental results from machine to simulation.
The use of digital twins, the ability to analyze data quickly, and to iterate models will speed up CFS’ path towards commercialization. CFS CEO, Bob Mumgaard, says that “CFS will be able to compress years of manual experimentation into weeks of virtual optimization using the digital infrastructure developed by NVIDIA and Siemens.”
This collaboration comes with the announcement that CFS has installed its first magnet in SPARC. The magnet is the first of 18, and CFS expects to complete installation by summer 2026. With their new digital twin infrastructure and current engineering progress, CFS is accelerating its development towards SPARC coming online.