LM26
LM26 is a magnetised target fusion device run by General Fusion in Canada. It is operating. Like every fusion device built so far, it has produced no net electricity.
Achieved its first lithium-liner compressions in 2025.
Magnetised target fusion: a plasma is compressed by collapsing a liquid lithium liner around it with pistons. The liquid metal is also the tritium breeder and the heat transfer medium, which is elegant if it works. The company listed on Nasdaq in July 2026.
| Organisation | General Fusion |
|---|---|
| Approach | magnetised target |
| Confinement | magnetic |
| Country | Canada |
| Status | Operating |
| First plasma | 2025 |
| Target date | none stated |
|---|---|
| Power target | none stated |
| Energy gain target | none stated |
| Net electricity | No. no fusion device has produced any |
Fusion needs tritium, and the world's civilian stock comes mostly from CANDU fission reactors. See the fusion overview.
LM26 in context
1 of the 24 fusion projects on record use the magnetised target approach: 1 operating, 0 under construction, 0 planned.
Its first plasma is dated 2025, 1 years ago: the 15th earliest of 15 projects on record with a first-plasma date.
| Measure | LM26 | Median of all projects | Standing |
|---|---|---|---|
| First plasma | 2025 | 2015 | 15 of 15 (earliest first) |
Worked out from the entries on this site only, so a figure compares LM26 with what is recorded here, not with everything that exists. An entry with no value for a measure is left out of that measure's ranking and median.
Sources
- World Nuclear Association, Nuclear Fusion Power · retrieved 2026-09-07
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data