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REBCO high‑temperature superconducting tape enables compact tokamaks with 10–20 T fields, but shifts engineering complexity into quench detection, radiation lifetime, and demountable joint qualification.
A task guide for replacing low-temperature superconducting tokamak field coils with REBCO HTS double-pancake windings to reach 12 T while cutting AC losses and cryogenic load.
Low‑temperature superconductors limit tokamak field strength, driving up size and cost. High‑temperature superconducting tapes enable fields above 20 T, allowing smaller, cheaper reactors without sacrificing fusion power.