Inertial confinement fusion
(Science: radiobiology) approach to fusion where the plasma is imploded so quickly that the inertia of the converging particles is so high that many fuse before they disperse. This is the method used in a hydrogen bomb, ICF schemes for power production usually use small pellets of fuel in an attempt to make miniature h-bomb type explosions. Methods for imploding the pellet include bombardment from all sides with high-powered laser and particle beams, and of course implosion in a fission bomb. Parts of ICF fusion research remain classified due to their military implications and applications, though much ICF research was recently declassified.