Strong ExB shear flows in the pedestal region in H-mode plasma
Plasma Physics
2007-05-23 v2
Abstract
We report the first experimental observation of stationary zonal flows in the pedestal region of the H-mode plasma in the H-1 toroidal heliac. Strong peaks in E_r shear mark the top and foot of the density pedestal. Strong m=n=0 low-frequency (f < 0.6 kHz) zonal flows are observed in regions of increased E_r, suggesting substantial contribution of zonal flows to the spatial modulation of E_r radial profiles. Radial localization of zonal flows is correlated with a region of zero magnetic shear and low-order (7/5) rational surfaces.
Cite
@article{arxiv.physics/0607256,
title = {Strong ExB shear flows in the pedestal region in H-mode plasma},
author = {H. Xia and M. G. Shats and H. Punzmann},
journal= {arXiv preprint arXiv:physics/0607256},
year = {2007}
}
Comments
4 pages, 5 figures