http://www.newsweek.com/artificial-sun-180-million-degrees-fahrenheit-race-near-limitless-clean-energy-1687630

A commercial "artificial sun," or tokamak, has achieved a world-first for a private company, generating plasma at 180 million degrees Fahrenheit (100 million degrees celsius), the temperature at which fusion can take place.

Tokamak Energy, based near Oxford in the United Kingdom, announced that its privately funded ST40 spherical tokamak had achieved the important temperature milestone on Thursday, calling it "the threshold required for commercial fusion energy."