Much as I dislike the dumb physics around Λ-CDM and fusion power, I admit some interest in the engineering to (not) get there.
Earlier last week we heard about smaller superconductive magnets. Now I hear about cheaper coolants for those magnets (pdf).
As to my interest - the whole array of magnet-driven theoretic megastructure just got (theoretically) cheaper. The mass-driver. The orbital ring. The directed-neutron fusion drive.
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