SPARC
CFS's tokamak using high-temperature superconducting magnets is intended to demonstrate plasma energy gain and test technology for the subsequent ARC.
Read the Japanese original
Project profile
Research results, fusion power, net electricity generation and commercialization are distinguished. Future operating dates and power levels are targets announced by the operator.
- Official name
- SPARC
- Operator
- Commonwealth Fusion Systems
- Operator type
- Private company
- Host country
- United States
- Host location
- Devens, Massachusetts, United States
- Category
- Research device
- Technical approach
- Tokamak・High-temperature superconducting magnets
- Development stage
- Construction
Development stage note: Development or operating stage reported in published sources; this does not guarantee the machine's operating status on the verification date.
Research and development objectives
Demonstrate fusion energy exceeding the input to the plasma and validate core technologies for ARC.
Verified milestones
No achievements suitable for recording were verified in the sources reviewed.
Announced future targets
- 2027 · Announced target (not achieved)
Achieve plasma fusion gain Q>1, not a demonstration of net grid electricity
Published technical specifications
| Item | Published value | Meaning, conditions and sources of values |
|---|---|---|
| Confinement magnets | high-temperature superconductivity (HTS) | Machine design |
Companies with verified involvement
- Commonwealth Fusion Systems (Japanese)：Operator / developer
Related in-depth FI articles
No existing article focused on this project has been verified.
Verification scope and classification notes
- Editorial classification of the purpose described in official sources; not necessarily the operator's formal classification.
- Matched to existing public company IDs. Roles are limited to those supported by the cited official sources.
- No item was verified in this review. This does not establish that none exists or that it is undisclosed.
- A future target announced by the developer, not an achieved result.
- Achieved values, design values and targets are distinguished in the basis field.
Official project information ↗
- SPARC: Proving commercial fusion energy is possible（Commonwealth Fusion Systems）
Verified: 2026-10-12
Last verified: 2026/10/12 20:22:07 (Japan time)
CFS's tokamak using high-temperature superconducting magnets is intended to demonstrate plasma energy gain and test technology for the subsequent ARC.
How to interpret the information
Demonstrating plasma energy gain and supplying net electricity to the grid are different milestones.
Development focus
High-temperature superconducting magnets / Plasma gain / Technology transfer to ARC
Official information from related companies and research institutions
Check each organization’s announcements for development progress and technical documentation.
Check the official information
Checked：2026-10-08