Global gyrokinetic simulations of ITG turbulence in the magnetic configuration space of the Wendelstein 7-X stellarator. (18th August 2020)

• Record Type: Journal Article
• Authors: Bañón Navarro, A; Merlo, G; Plunk, G G; Xanthopoulos, P; von Stechow, A; Di Siena, A; Maurer, M; Hindenlang, F; Wilms, F; Jenko, F
• Is Part Of: Plasma physics and controlled fusion. Volume 62:Number 10(2020)
• Publication Date: 2020-08-18
• Subjects: plasma turbulence -- transport in plasmas -- gyrokinetics -- plasma simulation; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/aba858
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: We study the effect of turbulent transport in different magnetic configurations of the Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with the global gyrokinetic code GENE-3D, modeling the behavior of Ion Temperature Gradient turbulence in the Standard, High-Mirror and Low-Mirror configurations of W7-X. We found that the Low-Mirror configuration produces more transport than both the High-Mirror and the Standard configurations. By comparison with radially local simulations, we have demonstrated the importance of performing global non-linear simulations to predict the turbulent fluxes quantitatively.