Speaker: Jan-Peter Baehner (Max Planck Institute for Plasma Physics)
Title: Core transport and turbulence in Wendelstein 7-X – challenges and recent experiments
Abstract: The Wendelstein 7-X stellarator is currently the most advanced stellarator in operation. In recent experimental campaigns, a new stellarator triple product record was reached as well as quasi-stationary performance which is on par with tokamak H-mode plasmas. While these results prove the appeal of the stellarator concept for next generation devices, the qualitative and quantitative understanding of transport processes requires improvement. In particular, different regimes of turbulent heat and particle transport, their suppression, impurity transport and neoclassical transport are under investigation.
This talk will provide a brief overview of the current status of W7-X and highlights from recent experiments, followed by a discussion of the challenges connected to understanding core transport and the experimental approaches to address these challenges.