From W7-X to a HELIAS fusion power plant: motivation and options for an intermediate-step burning-plasma stellarator. (3rd June 2016)

• Record Type: Journal Article
• Authors: Warmer, F; Beidler, C D; Dinklage, A; Wolf, R
• Other Names: collab.
• Is Part Of: Plasma physics and controlled fusion. Volume 58:Number 7(2016:Jul.)
• Publication Date: 2016-06-03
• Subjects: HELIAS -- research strategy -- intermediate-step burning-plasma stellarator -- systems studies; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/0741-3335/58/7/074006
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: As a starting point for a more in-depth discussion of a research strategy leading from Wendelstein 7-X to a HELIAS power plant, the respective steps in physics and engineering are considered from different vantage points. The first approach discusses the direct extrapolation of selected physics and engineering parameters. This is followed by an examination of advancing the understanding of stellarator optimisation. Finally, combining a dimensionless parameter approach with an empirical energy confinement time scaling, the necessary development steps are highlighted. From this analysis it is concluded that an intermediate-step burning-plasma stellarator is the most prudent approach to bridge the gap between W7-X and a HELIAS power plant. Using a systems code approach in combination with transport simulations, a range of possible conceptual designs is analysed. This range is exemplified by two bounding cases, a fast-track, cost-efficient device with low magnetic field and without a blanket and a device similar to a demonstration power plant with blanket and net electricity power production.