SPARC
SPARC, a fusion device (tokamak) in Massachusetts, United States, operated by Commonwealth Fusion Systems. Under construction.
It will join the 11 research reactors operating in the United States today.
- Country
- United States
- City
- Massachusetts
- Type
- Fusion device · Tokamak
- Confinement
- Conventional Tokamak
- Operator
- Commonwealth Fusion Systems
- Status
- Under construction
- First plasma
- —
See also: every research reactor in United States · How research reactors work
Data: IAEA FusDIS · updated on Sep 21, 2026