NIF achieves 5.2 MJ yield — 2.5× breakeven on N240204 shot

The National Ignition Facility at Lawrence Livermore National Laboratory reported a record 5.2 megajoule fusion energy yield on the N240204 shot, achieving 2.5× target gain on 2.05 MJ of laser drive energy. This is the seventh successful ignition shot at NIF since the breakthrough December 2022 result.

NIF program director Brian MacGowan attributed the improved yield to refinements in hohlraum geometry and to higher-quality D-T fuel layers achieved through a redesigned freezing cycle. Each shot still costs an estimated $4–6 million to prepare, underscoring the gulf between scientific demonstration and commercial relevance.