标题： 几何效应对优化托卡马克中流区流动动力学和湍流传输的影响 显示英文标题

标题： Geometry effects on zonal flow dynamics and turbulent transport in optimized stellarators

摘要： 全局 gyrokinetic 模拟发现，在优化了 neo-classical 输运的磁笼中，zonal 流动对离子温度梯度（ITG）湍流有很强的抑制作用。 由于 QH 和 QI 磁笼中的 zonal 流动具有更高的线性残差水平和更低的非线性频率，因此它们对 ITG 输运的抑制作用远大于准轴对称（QA）磁笼或托卡马克。 尽管磁笼中的线性增长率要大得多，但 QH 和 QI 的输运水平和能量限制时间与具有相同尺寸和温度梯度的托卡马克相似。 显示英文摘要

摘要： Global gyrokinetic simulations find a strong suppression of ion temperature gradient (ITG) turbulence by zonal flows in stellarators optimized for neoclassical transport. The reduction of the ITG transport by the zonal flows in quasi-helicalsymmetric (QH) and quasi-isodynamic (QI) stellarators are much larger than a quasi-axisymmetric (QA) stellarator or a tokamak, thanks to higher linear residual levels and lower nonlinear frequencies of the zonal flows in the QH and QI. The transport level and energy confinement time in the QH and QI are similar to the tokamak with the same size and temperature gradient, despite the much larger linear growth rates in the stellarators.