University of Washington engineers have designed a concept for a fusion reactor that, when scaled up to the size of a large electrical power plant, would rival costs for a new coal-fired plant with similar electrical output.
Now from the patents, this is a cusp field configuration. Not really that new. However they are trying to recycle the particles that escape from the cusps around the internal magnets. Only the end pole (mirror) losses are present in a first order approximation. So this is a cups/mirror system which is not new. They are high beta, but then so are reverse field configurations. And I can’t see anything that prevents flute instability around the mirrors. Unless they are doing the gas dynamic trap trick (the Russians still do mirror fusion work).
It will be interesting to see how it works. As it stands we have seen nothing to indicate that it has worked better than any other cusp configuration. And that was worse than Tokmaks or whatever.