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Multi-scale interactions of microtearing turbulence in the tokamak pedestal
Nuclear Fusion ( IF 3.3 ) Pub Date : 2020-10-29 , DOI: 10.1088/1741-4326/abba49
M.J. Pueschel 1, 2, 3 , D.R. Hatch 3 , M. Kotschenreuther 3 , A. Ishizawa 4 , G. Merlo 3
Affiliation  

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.

中文翻译:

托卡马克基座上微撕裂湍流的多尺度相互作用

人们发现,在理想的基座情况下,微撕裂湍流会通过纬向场饱和,同时也会激发强烈的纬向流。观察到非线性临界梯度的同时升档。纬向流使电子温度梯度驱动的湍流得到改善。当施加共振磁扰动时,通量表面的迅速电荷损失会侵蚀区域流,导致更高的电子级通量,同时不影响微撕裂的饱和物理学。
更新日期:2020-10-30
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