Explaining a mysterious barrier to fusion known as the 'density limit'

Explaining a mysterious barrier to fusion known as the 'density limit'
Washington DC (SPX) Nov 11, 2015 - For more than 50 years physicists have puzzled over a daunting mystery: Why do tokamak plasmas spiral apart when reaching a certain maximum density and halt fusion reactions? This "density limit" serves as a barrier that prevents tokamaks from operating at peak efficiency, and understanding what sets this maximum density would speed the development of fusion as a safe, clean and abundant energy ... more

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