4 ms·SPARC (tokamak) : https://en.wikipedia.org/wiki/SPARC_(tokamak) https://en.wikipedia.org/wiki/SPARC_(tokamak)by archo 3y agoSPARC (tokamak) : https://en.wikipedia.org/wiki/SPARC_(tokamak) https://en.wikipedia.org/wiki/SPARC_(tokamak)