The question, Moses said, is "Can we build a miniature Sun on Earth?" The recipe involves a peppercorn-size target of hydrogen isotopes deuterium and tritium heated to 200 million degrees Fahrenheit for a couple billionths of a second. To get that micro-blast of heat, the National Ignition Facility (NIF) uses lasers---coherent light---at a massive scale. Laser engineer Moses notes that photons are perfect for the job: "no mass, no charge, just energy."And the bastards that oppose moving to renewable energies will be convinced they were right, when it was only luck that saved civilization from the end of oil. Oh well. I'll take the win.
Moses ran a dramatic video showing how a shot at the NIF works. 20-foot-long slugs of amplified coherent light (10 nanoseconds) travel 1,500 yards and converge simultaneously through 192 beams on the tiny target, compressing and heating it to fusion ignition, with a yield of energy 10 to 100 times of what goes into it. Successful early test shots suggest that the NIF will achieve the first ignition within the next few months, and that shot will be heard round the world.
Fusion Ignition Time
They say it's always 10 years away, but Laser Ignition is more encouraging that the toroidal approaches: