Abstract
Long-distance toroidal correlations of potential and density fluctuations have been investigated at the TEXTOR tokamak [H. Soltwisch, Plasma Phys. Controlled Fusion 26, 23 (1984)] in edge electrode-biasing experiments. During the biasing-induced H-mode, the dc E × B shear flow triggers a zonal flow structure and hence long-distance correlation in potential fluctuations, whereas for density fluctuations there is nearly no correlation. These results indicate an intimate interaction between the mean and zonal flows, and the significance of long range correlations in improved-confinement regimes.
Original language | English |
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Article number | 110704 |
Pages (from-to) | 110704 |
Number of pages | 1 |
Journal | Physics of Plasmas |
Volume | 16 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2009 |