ENN Science and Technology Development
🇨🇳 CN · Active
ENN is a privately held Chinese energy group founded in 1993, which started in natural gas; its research arm develops fusion using compact spherical tokamaks and hydrogen–boron fuel. It commissioned the EXL-50 spherical torus in August 2019 and upgraded it to EXL-50U, which made its first plasma in January 2024. ENN says that in 2025 EXL-50U reached a plasma current of 1 million amperes with hydrogen–boron fuel, which it calls a world first.
- Sector
- Fusion
- Technology
- Spherical tokamak
- Role
- Fusion developer
It is the operator of record for EXL-50 (shut down) and EXL-50U (operating).
Terms
- Spherical tokamak
- A tokamak squeezed towards a cored-apple shape. The tighter aspect ratio holds plasma pressure with less magnetic field, which is efficient, but leaves very little room at the centre for the central column.
Design values
| Device | Parameter | Value | Unit | Status |
|---|---|---|---|---|
| EXL-50 | Major radius | 0.58 | m | design valueclaimed |
| EXL-50 | Minor radius | 0.41 | m | design valueclaimed |
| EXL-50 | On-axis magnetic field | 0.45 | T | design valueclaimed |
| EXL-50 | Plasma current | 0.5 | MA | design valueclaimed |
| EXL-50 | Plasma duration (nominal) | 5 | s | design valueclaimed |
Devices
Related companies
Sources
- 新奥集团股份有限公司operator
- ENN Groupaggregator
- EXL-50Uoperator