How close is fusion power, really? What General Fusion just proved

LM26 crossed a 1 keV electron-temperature milestone, but breakeven and a grid-ready plant remain ahead; the next target is 10 keV.

General Fusion said on Oct. 8 that its LM26 machine heated plasma beyond 12 million °C—more than 1 keV electron temperature—in measurements made jointly with the UK Atomic Energy Authority and described in technical papers submitted for peer review. Temperature is a central fusion milestone because nuclei must move fast enough to overcome electrical repulsion before useful reactions can occur.

General Fusion’s magnetized-target design compresses a magnetized plasma mechanically, rather than relying on a giant tokamak or laser facility, in an effort to make a power plant simpler and cheaper to scale. Other approaches are moving too: China’s ENN Group reported sustained hydrogen-boron reactions on Oct. 3, a fuel path that produces helium rather than neutron-heavy waste, and Type One Energy raised $200 million on Oct.

6 while targeting a 400 MW plant by 2034. Keep the scale honest: 1 keV is a physics milestone, not electricity on the grid. LM26 still needs to reach its next 10 keV target and then demonstrate net energy gain.

The progress is that published, measurable milestones are replacing vague promises—not that commercial fusion has already arrived.