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Building the Most Powerful Spherical Tokamak

Two major new components power the National Spherical Torus Experiment-Upgrade: A widened center stack that doubles the magnetic field strength and plasma current and quintuples the length of fusion experiments, and a second neutral beam injector that doubles the tokamak’s heating power. Taken together, the new parts boost the NSTX-U operating conditions closer to those that will be found in a commercial fusion power plant. 

Fusion Machines of the World

NSTX-U IS ONE OF AN ELITE GROUP of magnetic fusion facilities scattered across the globe. These powerful and complex machines are advancing mankind's quest to harness fusion as a safe, clean and abundant source of energy for producing electricity. Here is a selection of major facilities.

A New Era Begins

Welcome to the first major addition to the U.S. fusion program of the 21st century. The U.S. Department of Energy’s Princeton Plasma Physics Laboratory’s (PPPL) new $94 million National Spherical Torus Experiment-Upgrade (NSTX-U) is the most powerful fusion facility of its kind on Earth and a device poised to bring the world closer to a bold new energy age.

Builders and Users

Constructing the National Spherical Torus Experiment Upgrade took years of detailed planning and oversight. The team in charge brought decades of experience to the task, working together to make the $94 million upgrade a reality.

Scientist’s Quest For Artificial Muscle Aided by PPPL

PPPL collaborator Lenore Rasmussen, the sole proprietor of her Princeton-based, startup firm, Ras Labs, LLC, has the gift of serendipity. Two disparate life experiences sparked the polymer chemist’s interest in the development of electro-responsive “smart materials” — electrically-driven polymers that are strong and durable enough to act as artificial muscles in prosthetic devices and robotics.

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