The Fusion Breakthrough: What It Actually Means
The recent net-energy gain in inertial confinement fusion (Dec 2022) was a milestone, but commercialization is decades away.
Timeline of Major Fusion Milestones
| Year | Facility | Achievement |
|---|---|---|
| 1997 | JET (UK) | 16 MW output (Q=0.67) |
| 2021 | NIF (USA) | 1.3 MJ yield (Q=0.7) |
| 2022 | NIF (USA) | 3.15 MJ yield (Q=1.54) - First Net Gain |
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Common Mistakes in Fusion Reporting
- Confusing 'target gain' with 'wall-plug gain': The recent breakthrough produced more energy than the lasers hit the target with, but the lasers themselves required 100x more energy to fire.
Science FAQ
What is Q in fusion?
Q is the ratio of fusion power produced to the heating power supplied. Q>1 indicates net energy gain at the plasma level.
Next Step: Read our deep dive into plasma physics.