Seattle-based Interlune says it has managed to produce 99% pure helium-3 from a standard supply of industrial-grade helium, marking a milestone for a technology that the company aims to use on the moon.
The process, known as Cold Capture, could be profitably used on Earth even before Interlune begins lunar mining operations.
Only 0.000137% of the world’s helium exists in the form of helium-3, as opposed to the much more common helium-4 isotope. But helium-3 is uniquely suited for use as a refrigerant for quantum computers. It can also be used in radiation detectors, medical scanners and eventually fusion reactors.
Because of its rarity and utility, the price of helium-3 can range as high as $20 million per kilogram ($9 million per pound). Interlune is betting on the proposition that helium-3 is more abundant and easier to access on the moon, due to the lunar surface’s exposure to the solar wind. If Interlune’s business model works out, it will be able to turn a profit by delivering lunar helium-3 to Earth for industrial applications.
