Terms: Nuclear Fusion (5,490,000), thermonuclear fusion (283,000), atomic fusion (39,900), fusion energy (1,940,000), thermonuclear energy (23,200), controlled thermonuclear (833,000), thermonuclear research (267,000),
Terms: direct nuclear electric (5), nuclear electric (444,000), nuclear propulsion (469,000), thermonuclear propulsion (49),
Terms: fusion reactor (1,030,000), thermonuclear reactor (60,500), fusion reactors (491,000), thermonuclear reactors (79,200), thermonuclear power plants (1,190), thermonuclear power plant (594),
Terms: tokamak (1,440,000), tokamaks (425,000), inertial confinement (463,000), magnetic confinement (229,000), aneutronic fusion (3,370), thermionic (925,000), therm-ionic (33), nuclear battery (51,400), nuclear batteries (76,400), atomic battery (11,600), atomic batteries (20,500), radioactive battery (985), radioisotope battery (518),
Boolean: "direct conversion" +nuclear +electric (40,700),
Terms: fusion power (2,240,000), fusion reaction (392,000), thermonuclear electric (74), thermonuclear power (19,100),
Terms: thermonuclear reactions (191,000), thermonuclear reaction (67,400), thermonuclear reaction rates (2,590), thermonuclear reaction rate (911),
Terms: thermo-nuclear (193,000), thermonuclear (4,560,000),
Terms: international thermonuclear experimental reactor (236,000), thermonuclear program (1,010),
Terms: sonoluminescence (180,000), sono-nuclear (21),
Terms: betavoltaics (58,700), betavoltaic (322,000), beta emitter (40,700), beta emitters (93,700), technicium 99 (664), strontium 90 (684,000), radioisotopes (2,580,000),
Terms: optoelectric (36,700), optoelectric nuclear (346), optoelectric nuclear battery (336),