Fig. 2: Broadband turbulence measured by Beam Emission Spectroscopy (BES) in the pedestal region of quiescent-H (QH) mode discharge #184902.
From: How turbulence spreading improves power handling in quiescent high confinement fusion plasmas
a Cross power and b poloidal wave number \({k}_{\theta }\) as a function of frequency at different pedestal radial locations. The positive wave number shows the mode rotates in the ion diamagnetic direction (IDD) in the lab frame and the negative wave number shows the mode rotates in the electron diamagnetic direction (EDD) in the lab frame. c the radial envelope of density fluctuation (\(\delta n/n\)) associated with the IDD (red) and EDD (blue) mode. The error bar for the density fluctuation \(\delta n/n\) is derived from the reciprocal of the square root of the coherence in the related frequency range.
