NIF Fusion Record: 8.6 MJ Yield
NIF shatters its own record with a 4x energy gain—fusion moves from one-off miracle to reproducible science.
Explore this event on the interactive timeline →In April 2025, NIF achieved a record-breaking fusion yield of 8.6 megajoules from a 2.08 MJ laser input, representing a target gain greater than 4x. This was nearly triple the energy of the historic 2022 ignition shot, demonstrating that fusion ignition was not a one-off event but a systematically reproducible phenomenon.
Key Numbers
- Laser Input
- 2.08 MJ
- Fusion Output
- 8.6 MJ
- Target Gain
- >4x
Verified Facts
- The 8.6 MJ yield was nearly 3x the energy of the historic December 2022 ignition shot (3.15 MJ).
- NIF used "continuous gradient doping" in the target capsule to reduce fuel contamination and improve yields.
- The result proved fusion ignition is reproducible and systematically improvable, not a lucky one-off.