Superconducting Magnets for Fusion
The magnet is the machine. Everything about a compact fusion device follows from how much field its coils can hold.
Fusion needs strong magnetic fields to confine a hot plasma; the stronger the field, the smaller and cheaper the machine can be for the same performance. High-temperature superconductors — chiefly REBCO — carry enormous currents at high field with no resistive loss, enabling fields that copper coils could never sustain continuously.
| Breeder peak field | 16.84 T |
|---|---|
| Burner plug field | 26.49 T |
| Conductor | REBCO HTS tape |
| Study | DOI 10.5281/zenodo.21842514 |
The magnet is the machine: everything about a compact fusion device follows from how much field its coils can hold. REBCO high-temperature superconductors let Kronos reach 16.84 T in the breeder and 26.49 T in the burner plug continuously, and the full package — conductor, joints, current leads, quench protection, structure — is documented openly and benchmarked against real coils.
Common questions
16.84 T at the conductor in the breeder, and 26.49 T in the burner's high-field plug — fields only high-temperature (REBCO) superconductors can sustain continuously.
Cyclic fatigue of the high-field plug coil. It is sound under static load but cyclic fatigue at full field is a named engineering gate, closed by a powered magnet test coil.