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This 21-minute talk by Georgia Acton explores the full flux surface version of the gyrokinetic code "stella," designed to address challenges in modeling plasma turbulence in complex magnetic geometries. Learn about the code's pseudo-spectral method that maintains spectral accuracy in perpendicular directions while using an implicit algorithm for magnetic field dynamics. Discover how the iterative-implicit treatment offers both fully-implicit and mixed implicit-explicit options, enabling larger time steps when simulating kinetic electron behavior and significantly improving computational efficiency compared to explicit codes. The presentation includes a comparative analysis between flux-tube simulations and the full flux version of stella using both adiabatic and kinetic electrons, contributing to discussions about zonal modes in three-dimensional geometries and advancing turbulence modeling for fusion research. This Simons Foundation presentation aims to support the fusion community's progress toward more sophisticated devices like stellarators and advanced tokamaks.
