ITER is generally expected to work, even though it's not an economically practical design. Since ITER was designed, better high-temperature superconductors hav

ITER is generally expected to work, even though it's not an economically practical design. Since ITER was designed, better high-temperature superconductors have become available (Rebco tape), which makes smaller, cheaper designs with higher power density possible. Another new technology is FLiBe, a molten salt used to capture the energy from the reaction. The MIT Sparc and Arc projects are one group's attempts at coming up with a practical design. They seem to be making steady progress.