Controlling turbulence in present and future stellarators.
Controlling turbulence in present and future stellarators.
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控制当前和未来仿星器中的湍流。
DOI：
10.1103/physrevlett.113.155001
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发表时间：
2014
影响因子：
8.6
通讯作者：
J. Proll
中科院分区：
文献类型：
--
作者：
P. Xanthopoulos;H. Mynick;P. Helander;Y. Turkin;G. Plunk;F. Jenko;T. Görler;D. Told;T. Bird;J. Proll
湍流被广泛认为会限制约束，从而限制现代新古典优化仿星器的整体性能。我们采用新的petaflop规模的gyrokinetic模拟来预测整个仿星器磁表面上的湍流波动和相关的传输缩放的分布，并揭示了惊人的差异托卡马克。使用随机的全局搜索优化方法，我们得到了第一个连续性优化的仿星器配置源于现有的准全能设计。
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.