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Technical Library › Glossary of Fusion & Plasma Terms
Glossary
Hyperion breeder · design render
Hyperion breeder · design render · © 2026 KFE

Current-Drive Efficiency

Bootstrap current developing — current drive.
Bootstrap current developing — current drive. canon 2026-08-27 · © 2026 KFE

How much current each watt of external power drives — a key economic lever.

Glossary of Fusion & Plasma TermsUpdated 2026-08-11

Current-drive efficiency (amperes per watt) sets how much power a steady-state tokamak must spend sustaining its current, directly affecting recirculating power. Raising it, and the bootstrap fraction, improves the energy ledger.

Related

Current Drive →Bootstrap Fraction →Recirculating Power →
← PreviousCurrent Ramp-Up and Ramp-DownNext →Current-Lead Heat Leak