Wendelstein 7-X
also W7-X
The main purpose of Wendelstein 7-X is to prove the possibility of using the stellarator concept for power plant designs, by operating up to 30 minutes with a heating power up to 10 MW .
- Type
- Fusion device
- Approach
- Stellarator
- Country
- DE
- Status
- Operating
- Ownership
- public
Results
360 s Plasma duration claimed
measured 2025-05-22 · sustained · medium confidence
6 × 10²⁶ K·m⁻³·s Fusion triple product (nTτE) claimed
measured 2017 · medium confidence
4 × 10⁷ K Ion temperature claimed
measured 2017 · medium confidence
8 × 10¹⁹ m⁻³ Plasma density claimed
measured 2017 · medium confidence
26 s Plasma duration claimed
measured 2017 · medium confidence
480 s Plasma duration claimed
measured 2023-02-15 · sustained · low confidence
Design values
What the machine was built to do, as published. Not results, and never ranked.
| Parameter | Value | Unit | Status | Source |
|---|---|---|---|---|
| Major radius medium confidence | 5.5 m | m | claimed | World Survey of Fusion Devices 2022 independent |
| Minor radius medium confidence | 0.53 m | m | claimed | World Survey of Fusion Devices 2022 independent |
| On-axis magnetic field medium confidence | 3 T | T | claimed | World Survey of Fusion Devices 2022 independent |