Overview of Wendelstein 7-X performance and prospects

A seminar by Novimir Pablant

Abstract: Wendelstein 7-X (W7-X), the world's most advanced optimized superconducting stellarator, has demonstrated high performance steady-state operation and in doing so strengthened the scientific basis and attractiveness of an optimized stellarator as a path to a Fusion Pilot Plant. W7-X is a mid-size 5-field period superconducting fusion experiment with a major-radius of 5.5m, minor-radius of 0.5m, plasma volume of 30m^3, and 2.5T magnetic field on-axis. W7-X has been designed to run for 30 minutes with 10MW input power by utilizing a fully watercooled island divertor design; the W7-X scientific and technology development programs towards this goal will be described along with successes, and challenges, with an emphasis on plasma performance and long-pulse operation. In addition to a discussion on future plans for the W7-X program, the larger context of W7-X along the path to a fusion pilot plant will be discussed, including through private investment in the stellarator concept. W7-X is operated by the Max Plank Institute for Plasma Physics in Greifswald, Germany, with strong collaborations amongst US institutions and other international partners.

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