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3w ago

CFS Installs First SPARC Magnet, Taps Nvidia and Siemens for AI Digital Twin

The AI twin is meant to accelerate engineering decisions toward a 2026 SPARC build.

Commonwealth Fusion Systems installs first magnet in its Sparc fusion reactor.
A magnet is installed at CFS's Sparc reactor.
Screenshot
A visual illustration of the digital twin of Commonwealth Fusion Systems’ fusion demonstration machine SPARC. In collaboration with Siemens and Nvidia, the digital twin of SPARC was unveiled at CES 2026 in Las Vegas.

Overview

  • The installed D-shaped toroidal field magnet is the first of 18, with the remaining units scheduled through summer 2026 and first plasma targeted in 2027.
  • Each high‑temperature superconducting magnet weighs about 24 tons, generates a 20‑tesla field, and will be cooled to roughly −253°C to safely carry over 30,000 amps.
  • The digital twin will integrate Siemens Xcelerator design and PLM data with NVIDIA Omniverse and OpenUSD to couple classical and AI physics models for fast simulation‑to‑experiment comparisons.
  • CFS detailed the progress at CES alongside Siemens and NVIDIA leaders, highlighting plans to use AI‑enabled workflows to compress testing and iteration.
  • The company has raised nearly $3 billion, including an $863 million round with NVIDIA and Google, and is planning a 400‑MW ARC plant in Virginia in the early 2030s, with Google having agreed to buy power.