FusionCombining light nuclei to form heavier ones, releasing energy
PlasmaFourth state of matter - ionized gas
TokamakDonut-shaped magnetic confinement device
StellaratorTwisted magnetic confinement device
DeuteriumHeavy hydrogen (one proton, one neutron)
TritiumSuper-heavy hydrogen (one proton, two neutrons)
QValueRatio of fusion power output to heating power input
IgnitionSelf-sustaining fusion (Q = infinity)
ITERInternational fusion experiment in France
BreakevenWhen fusion power equals input power (Q=1)