On Monday, Japanese startup Helical Fusion announced that it has successfully completed a major performance test of its high-temperature superconducting (HTS) coil, a critical step toward developing commercial nuclear fusion energy.
The achievement marks the world’s first demonstration of a large-scale HTS coil designed for a commercial reactor that maintained stable current flow under superconducting conditions while replicating the magnetic environment inside a fusion device.
The test achieved a stable superconducting current of 40 kA under a 7-tesla magnetic field at 15 K (-258°C) using facilities at Japan’s National Institute for Fusion Science (NIFS). The success positions Helical Fusion as one of the leading global contenders in the race to develop commercial fusion power.
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