[ublaze]

ICF: Inertial Confinement Fusion

MCF: Magnetic Confinement Fusion

CFS is Commonwealth Fusion Systems - https://cfs.energy/

Q is the ratio between energy in and out in a fusion system. Q > 1 is the holy grail, which implies we have more energy out of the fusion system than in. CFS is aiming for Q 11 in its prototype reactor.

SPARC is the "Smallest Possible" ARC I believe. It's their prototype reactor that they're working on that uses magnetic fields through superconductors to contain Hydrogen as it heats up into plasma and goes through the fusion process.

ARC is the 400MW reactor that will be produced (aimed for within a decade) if SPARC succeeds - it's the scaled-out version of SPARC.

It has an impressive set of people working on it (ex-SpaceX).

And yes, ARC is named after the Iron Man reactor.