4 ms·
The claim about the second is correct, the first not quite since there are a few mid temperature superconductors that do work in liquid nitrogen, and REBCOs are
by AstralStorm 2y ago
The claim about the second is correct, the first not quite since there are a few mid temperature superconductors that do work in liquid nitrogen, and REBCOs are mechanically good enough.
Their problem is all the rare earths - and to make a magnetic containment fusion reactor you need truly massive coils. So you face a problem in price and availability of the materials...
- pfdietz 2y ago> Their problem is all the rare earths The fraction of mass in a HTS magnet that is rare earth is surprisingly small. Most of the mass is mechanical support, or substrate on which the thin HTS film is deposited. The entire ARC reactor might contain 10 kilograms of REBCO (2015 paper), out of a reactor mass of over 7 gigagrams. https://arxiv.org/pdf/1409.3540 https://arxiv.org/pdf/1409.3540