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In page Stellarator:

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  • Helias – A helical advanced stellarator, using an optimized modular coil set designed to simultaneously achieve high plasma, low Pfirsch–Schluter currents and good confinement of energetic particles; i.e., alpha particles for reactor scenarios.[4] The Helias has been proposed as the most promising concept for a power plant, with a modular engineering design and optimised plasma, MHD and magnetic field properties.[citation needed] The W7-X is based on a five field-period Helias configuration.