In the fusion process Deuterium and Tritium (isotopes of Hydrogen) are compressed to create Helium and an energetic particle or neutron. This neutron can be captured to produce energy by heating water to drive a steam turbine. But producing more energy than is used in the process remains the key to a real breakthrough.
From TCS Daily:
Not all senior physicists believe an early breakthrough in fusion energy is either possible or, given the prevailing global economic conditions, even viable. And when Professor Dunne, director of the European HIPER project gives us an analogy for "perspective," it is not hard to see why. Dunne puts it this way:
"The laser is 10,000 times the power of the entire UK National Grid. And then you're going to focus that down onto a spot that's 10 to 100 times smaller than the width of a human hair. The pressure is equivalent to 10 Nimitz class aircraft carriers sitting on your thumb. Some pretty crazy things are going to happen."
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