G. Fuchert

TL;DR: The Wendelstein 7-X (W7-X) as mentioned in this paper is a state-of-the-art ECRH-based system for plasma start-up and operation using electron cyclotron resonance heating (ECRH).

TL;DR: The Wendelstein 7-X superconducting stellarator as discussed by the authors achieved the first measurement data after 15 years of construction and one year of commissioning, achieving a core-electron root and energy confinement times in line with the international stellarator scaling.

TL;DR: Wendelstein 7-X as discussed by the authors is the first comprehensively optimized stellarator aiming at good confinement with plasma parameters relevant to a future stellarator power plant, which achieved the highest triple product (6.5× 1019 keV m−3 s) achieved in a stellarator until now.

TL;DR: The design of the Thomson scattering system at the Wendelstein 7-X stellarator is described and peaked temperature profiles and flat density profiles are observed in helium and hydrogen discharges.

TL;DR: The first physics operation phase on the stellarator experiment Wendelstein 7-X was successfully completed in March 2016 after about 10 weeks of operation, and results were beyond the expectations published shortly before the start of operation.