Multi-scale interactions of microtearing turbulence in the tokamak pedestal
Multi-scale interactions of microtearing turbulence in the tokamak pedestal
复制标题
托卡马克基座中微撕裂湍流的多尺度相互作用
DOI：
10.1088/1741-4326/abba49
复制
发表时间：
2020
期刊：
影响因子：
3.3
通讯作者：
Merlo G.
中科院分区：
文献类型：
--
作者：
Pueschel M.J.;Hatch D.R.;Kotschenreuther M.;Ishizawa A.;Merlo G.
微撕裂湍流在一个理想化的基座的情况下被发现饱和通过纬向场，同时也激发强纬向流，同时观察到的非线性临界梯度的上移。带状流动导致电子温度梯度驱动的湍流得到改善。当应用共振磁扰动时，通量表面的电荷损失会侵蚀纬向流，导致更高的电子尺度通量，同时使微撕裂饱和物理不受影响。
Microtearing turbulence in an idealized pedestal scenario is found to saturate via zonal fields, while also exciting strong zonal flows; a concurrent upshift of the non-linear critical gradient is observed. The zonal flows cause electron-temperature-gradient-driven turbulence to be ameliorated. When applying resonant magnetic perturbations, the prompt charge loss off the flux surface erodes the zonal flow, leading to higher electron-scale fluxes, while leaving microtearing saturation physics unaffected.