And right now they're building their seventh reactor, for a net electricity attempt in 2024.

It's the only one with a ghost of a chance. Still only a ghost, and the 3He supply problem looms.

They'd make their own 3He by also doing DD fusion. It's properly a DD+D3He concept.

I would like to see a demonstration that the synthesis method would exceed consumption. It should be possible with current tech, if at all.

Well, they can operate on just DD, so they can start from no 3He and make 3He.

This video of a presentation by Helion's Kirtley at Princeton has a slide where the reactivity vs. energy loss is shown for a DD system at beta=1. That system will make 3He directly, and also make tritium by two modes (directly from DD, and by capture of neutrons on 6Li in a blanket.) The net result would be production of 1.5 3He nuclei per DD fusion, on average. It takes a while for some of those 3He to be produced though, as the tritium has to decay (halflife of 12 years.)

https://mediacentral.princeton.edu/media/JPP08December2022_D...