Off The Pedestal:

IT/P6-14 Pedestal Stability Comparison and ITER Pedestal Prediction

The pressure at the top of the edge transport barrier (or “pedestal height”) strongly impacts fusion performance, while large edge localized modes (ELMs), driven by the free energy in the pedestal region, can constrain material lifetimes. Accurately predicting the pedestal height and ELM behavior in ITER is an essential element of prediction and optimization of fusion performance. Investigation...

Microtearing modes and the pedestal

Some observations on the pedestal effect.

The pedestal or dipper effect is the large improvement in the detectability of a sinusoidal grating observed when it is added to a masking or pedestal grating of the same spatial frequency, orientation, and phase. We measured the pedestal effect in both broadband and notched noise-noise from which a 1.5-octave band centered on the signal frequency had been removed. Although the pedestal effect ...

Magnetohydrodynamic mechanism for pedestal formation.

Time-dependent two-dimensional magnetohydrodynamic simulations are carried out for tokamak plasmas with edge poloidal flow. Differently from conventional equilibrium theory, a density pedestal all around the edge is obtained when the poloidal velocity exceeds the poloidal sound speed. The outboard pedestal is induced by the transonic discontinuity, the inboard one by mass redistribution. The de...

Microtearing Turbulence Limiting the JET-ILW Pedestal

D.R. Hatch, M. Kotschenreuther, S. Mahajan, P. Valanju, F. Jenko, D. Told, T. Görler, and S. Saarelma Institute for Fusion Studies, University of Texas at Austin, Austin, Texas, 78712 Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA Max Planck Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany Culham Centre for Fusion Energy, Culham S...