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CFS Installs First SPARC Magnet, Launches SiemensNVIDIA Digital Twin

A new AI-enabled digital twin aims to compress years of fusion reactor engineering into weeks.

Overview

  • The first of 18 high-temperature superconducting toroidal field magnets is now in place, with full installation targeted by the end of summer, according to CEO Bob Mumgaard.
  • Each D-shaped magnet weighs about 24 tons and is designed to produce a roughly 20‑tesla magnetic field within SPARC’s compact tokamak.
  • CFS will integrate Siemens Xcelerator design and PLM data with NVIDIA Omniverse and OpenUSD to create a high-fidelity virtual replica for rapid simulation and validation.
  • Siemens’ digital tools are being deployed to streamline manufacturing and operations at CFS’s magnet factory in Devens, Massachusetts.
  • The company plans to power up SPARC next year, has raised nearly $3 billion to fund the program, and cites early-2030s commercialization goals as customers such as Google line up future power purchases.