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. 2014 Oct 10;113(15):155001.
doi: 10.1103/PhysRevLett.113.155001. Epub 2014 Oct 7.

Controlling turbulence in present and future stellarators

P Xanthopoulos  1 , H E Mynick  2 , P Helander  1 , Y Turkin  1 , G G Plunk  1 , F Jenko  3 , T Görler  3 , D Told  3 , T Bird  1 , J H E Proll  1
Affiliations

Controlling turbulence in present and future stellarators

P Xanthopoulos et al. Phys Rev Lett. .

Abstract

Turbulence is widely expected to limit the confinement and, thus, the overall performance of modern neoclassically optimized stellarators. We employ novel petaflop-scale gyrokinetic simulations to predict the distribution of turbulence fluctuations and the related transport scaling on entire stellarator magnetic surfaces and reveal striking differences to tokamaks. Using a stochastic global-search optimization method, we derive the first turbulence-optimized stellarator configuration stemming from an existing quasiomnigenous design.

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