An Australian startup pursuing hydrogen-boron fusion ignited by ultra-high-intensity lasers, promising aneutronic energy with direct electricity conversion and no radioactive waste.
HB11 Energy was founded in 2017 in Sydney, Australia, building on decades of theoretical work by the late physicist Heinrich Hora. The company's name derives from its fuel: hydrogen (H) and boron-11 (B11), which fuse to produce three helium-4 nuclei (alpha particles) and no neutrons in the primary reaction channel. This aneutronic pathway is the company's central value proposition — if achievable at scale, it would eliminate the need for massive neutron-shielding blankets and tritium breeding systems that burden deuterium-tritium reactor designs.1
HB11 Energy's scheme uses petawatt-class laser pulses to initiate fusion in a hydrogen-boron fuel target. The concept draws on Hora's "block ignition" theory, which posits that ultra-short, ultra-intense laser pulses can accelerate protons into a boron-rich target with sufficient energy to trigger a fusion avalanche without requiring thermonuclear temperatures.2
The reactor concept envisions a cylindrical target placed inside a magnetic coil that confines the resulting alpha particles. As the charged helium nuclei spiral outward, they induce current in surrounding coils, converting kinetic energy directly into electricity. This eliminates the steam turbine entirely — a radical departure from every operating power plant on Earth.
In 2023, the company reported producing "billions" of alpha particles from laser-driven p-B11 reactions in laboratory experiments, a result the team described as a record yield for this fuel combination.3
The physics community has long regarded p-B11 as among the most difficult fusion fuels to ignite. The Coulomb barrier is far higher than for D-T, and bremsstrahlung radiation losses at the required temperatures (hundreds of keV) are severe. Conventional Lawson-criterion analyses suggest that a thermonuclear p-B11 plasma would radiate away more energy than it produces. Hora's non-equilibrium block-ignition concept sidesteps this objection, but the theory remains contested.4
HB11 Energy has raised funding from private investors and the Australian government, though at a scale far smaller than the billion-dollar rounds seen by some magnetic-confinement competitors. The company collaborates with several university groups and national laboratories for laser access and target fabrication.
If the block-ignition mechanism proves scalable, HB11 Energy's pathway could leapfrog the engineering complexity that dominates mainstream fusion — no blankets, no turbines, no tritium. The scientific burden of proof, however, remains substantial, and the gap between laboratory-scale alpha-particle production and a net-energy reactor is vast.