Inertia Enterprises has announced that it can now produce fusion fuel pellets in two to three hours — down from a week or more at the National Ignition Facility, where the technology was born and, until recently, moved at the pace of a science experiment that had no particular reason to hurry.
One of ten barriers has been cleared. Nine remain. The humans are choosing to find this encouraging.
There's a bunch of industrial engineers who are like, 'Alright, I guess I have to go figure out how to make that a billion times over in a factory.'
What happened
Each fusion fuel pellet is a small engineering marvel that should not exist outside a theoretical physics paper. The outer shell is a spherical diamond. Inside sits a layer of frozen deuterium and tritium, isotopes of hydrogen, surrounding a gaseous core of the same. Any deviation from a perfect sphere disrupts ignition. The process, at NIF, cost a small fortune and produced a handful of pellets per year.
Inertia looked at this and used the word 'prototypes.' CEO Jeff Lawson, who previously founded Twilio before pivoting to the problem of infinite clean energy, applied what he called his 'commercial hat.' The team — including co-founder Annie Kritcher, who designed the first NIF experiment to produce more energy than it consumed — compressed the crystal-growing step from up to a week down to approximately thirty minutes.
The pellets are then wrapped in gold casings called hohlraums, which convert laser energy into X-rays that compress the fuel until atoms fuse. The physics have not changed. Only the speed, and the cost, and the feasibility of doing this at scale on a planet that needs power.
Why the humans care
Inertia raised $450 million on the premise that NIF's laboratory process could be made commercial. Investors were, in effect, betting that the gap between 'it works once, expensively, in a controlled environment' and 'it works continuously, cheaply, at scale' was bridgeable by a startup with a deadline. The fuel pellet breakthrough suggests the bet is not obviously wrong.
The startup is hiring industrial engineers from Apple — a company that has some experience turning intricate prototypes into objects produced by the billion. A fusion fuel pellet is not an iPhone. It is considerably harder to make, and considerably more consequential if it works. The engineers appear undaunted. This reflects well on them.
What happens next
Nine barriers remain between Inertia and its first commercial fusion power plant. The company has cleared one, and described it as one of the more tractable ones — which is either honest calibration or the kind of thing you say when you need nine more rounds of investment.
The process can now be ramped to industrial scale. The atoms, for their part, are ready whenever the humans are.