Microtearing turbulence limiting the JET-ILW pedestal

2016/08/16 by D. R. Hatch, D.R. Hatch, M. Kotschenreuther +7 · 1 citation
Engineering · #Aerodynamics and Acoustics in Jet Flows #Fluid Dynamics and Turbulent Flows #Flow Measurement and Analysis

paper · doi:10.1088/0029-5515/56/10/104003

Abstract

Abstract The first nonlinear gyrokinetic turbulence simulations that quantitatively reproduce experimental transport levels in an H-mode pedestal are reported. In the JET-ILW (ITER-like wall) pedestal, the bulk of the transport in the steep gradient region is caused by the turbulence driven by the microtearing mode (MTM). Kinetic ballooning modes are found to be in a second-stability regime. With contributions from the neoclassical and electron temperature gradient driven transport, the MTM mechanism reproduces, quantitatively, the experimental power balance across most of the pedestal.

Citations

• Pedestal stability comparison and ITER pedestal prediction
• MHD and gyro-kinetic stability of JET pedestals
• Gyrokinetic study of ASDEX Upgrade inter-ELM pedestal profile evolution

Cited by

• Detecting Shearless Phase-Space Transport Barriers in Global Gyrokinetic Turbulence Simulations with Test Particle Map Models

Related

• A gyrokinetic perspective on the JET-ILW pedestal
• Microtearing modes as the source of magnetic fluctuations in the JET pedestal
• The JET hybrid H-mode scenario from a pedestal turbulence perspective
• Complex structure of turbulence across the ASDEX Upgrade pedestal
• Kinetic-ballooning-mode turbulence in low-average-magnetic-shear equilibria