Abstract
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.
Original language | English |
---|---|
Article number | 124005 |
Number of pages | 5 |
Journal | Nuclear Fusion |
Volume | 60 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2020 |
Keywords
- H-mode pedestal
- microtearing
- multiscale turbulence
- zonal fields
- zonal flows