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High-temperature superconducting magnets

Official name
Magnets using high-temperature superconducting materials
ENGLISH
High-temperature superconducting magnets

Magnet technology for producing strong magnetic fields. CFS uses REBCO high-temperature superconducting materials in more compact high-field tokamaks.

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Read the Japanese original
A terminology guide explaining meaning and role.Checked: 2026-10-08。
Superconducting magnets are assessed at three scales: wire materials under temperature, field and current; coils with joints, supports and cooling; and systems combining power, control and fault protection.
An editorial schematic separating three scales of magnet evaluation. Designs and operating conditions vary between companies. 20 T refers to the MIT/CFS large model-magnet test, not power-plant performance.FUSION INDUSTRY editorial team — original diagram

Magnet technology for producing strong magnetic fields. CFS uses REBCO high-temperature superconducting materials in more compact high-field tokamaks.

Business considerations

Consider manufacturing repeatability, maintenance, quality assurance and supply availability alongside individual performance. Check the reactor's overall objectives and the scope demonstrated for each component.

Close-up of an ITER central-solenoid conductor, showing bundled superconducting strands and a central flow channel inside its metal jacket.
Niobium–tin (Nb3Sn) cable-in-conduit conductor for ITER’s central solenoid, with the internal structure exposed. Photographed May 29, 2017; resized and compressed for publication. This is a low-temperature Nb3Sn conductor, not the high-temperature REBCO wire discussed in this article.Photo: Charlie Sanabria, “ITER Central Solenoid CICC”, CC BY-SA 2.0 · CC BY-SA 2.0

Understanding the organizations and companies

'High-temperature superconducting' does not mean operation at room temperature; it describes materials that can superconduct at higher temperatures than conventional low-temperature superconductors. Fusion magnets still require cooling. Conductor manufacture, cabling, winding and joining, mechanical support, and protection and inspection are separate stages. Do not label a photograph of an ITER niobium-tin conductor as REBCO high-temperature superconducting tape.

Furukawa Electric / SuperPower / Commonwealth Fusion Systems / Helical Fusion / Proxima Fusion

Official information from related companies and research institutions

Check each organization’s announcements for development progress and technical documentation.

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