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Propeller wind turbines are the most common way of using one of the most abundant energy sources on Earth to generate electricity. The tall three-bladed fans are the ubiquitous symbol of wind energy, but they aren't the only design on the market.

Stewart Prager, a well-known plasma physicist and fusion scientist with a distinguished career and a record of discovery at the University of Wisconsin, arrived in January 2009 as director of PPPL, the United States’ leading magnetic fusion facility. Fusion energy, which is fueled by hot gases of charged particles known as plasma, has the potential to become a safe, clean and abundant energy source for the future. For nearly 60 years, Princeton has been a world leader in research on magnetic fusion energy due to efforts by scientists and engineers at PPPL