Tokamak Energy Achieves World-First Fusion Breakthrough with 11.8 Tesla Magnetic Field

Nov 24, 2025
Interesting Engineering
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Summary

UK's Tokamak Energy achieves world-first fusion breakthrough by generating record 11.8 Tesla magnetic field at -243°C using revolutionary high-temperature superconducting magnets, validating critical technology for commercial fusion power plants while opening doors to transformative applications in electric aviation, data centers, and magnetic levitation transport.

Key Points

  • UK-based Tokamak Energy achieves world-first breakthrough by successfully creating fusion power plant magnetic fields in its Demo4 high-temperature superconducting magnet system, reaching 11.8 Tesla at -243°C
  • The Demo4 system validates complete magnet system performance with 14 toroidal and 2 poloidal field magnets, addressing critical engineering challenges for commercial fusion power plants by testing superconducting tapes in complex magnetic environments
  • High-temperature superconducting technology shows commercial potential beyond fusion energy, offering 200 times the current density of copper for applications in data centers, electric aviation motors, and magnetic levitation transport systems

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