A section of NCSX, a fusion reactor so ambitious and advanced for its day that it was cancelled while half-built, in 2008. Each of those massive squiggly copper magnets — of which there were many — had to be held to sub-millimeter precision through many thermal cycles in liquid nitrogen. The vessel is solid inconel. What a beast!
Somebody remind me to write up a more thorough post about the history of stellarators at some point.














