Critical gradient turbulence optimization toward a compact stellarator reactor concept

Abstract

Integrating turbulence into stellarator optimization is shown by targeting the onset for the ion-temperature-gradient mode, highlighting effects of parallel connection length, local magnetic shear, and flux surface expansion. The result is a compact quasihelically symmetric stellarator configuration, admitting a set of uncomplicated coils, with significantly reduced turbulent heat fluxes compared to a known stellarator. The new configuration combines low values of neoclassical transport, good alpha particle confinement, and Mercier stability at a plasma beta of almost 2$\%$.

5 pages, 5 figures. Phys. Rev. Research 5, L032030 (2023)

References in corpus (2)

• Coarse-grained gyrokinetics for the critical ion temperature gradient in stellarators
• Comparing linear ion-temperature-gradient-driven mode stability of the National Compact Stellarator Experiment and a shaped tokamak

Cited by in corpus (6)

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• Zonal flow suppression of turbulent transport in the optimized stellarators W7-X and QSTK
• Critical gradient optimization for quasi-isodynamic stellarators