Title :
Effects of electrode biasing on fluctuations and transport in the KT-5C tokamak
Author :
Wang, Cheng ; Pan, Ge-Sheng ; Yu, Chang-Xuan ; Wen, Yi-Zhi ; Wan, Shu-De ; Wang, Zhi-jiang ; Liu, Wan-Dong ; Sun, Xuan ; Wang, Jun ; Gao, Hui
Author_Institution :
Dept. of Modern Phys., Univ. of Sci. & Technol. of China, Hefei, China
fDate :
4/1/2002 12:00:00 AM
Abstract :
Electrode biasing experiments are carried out on the KT-5C tokamak to investigate the effects of the radial electric field Er on turbulence. A modestly enhanced Er gradient layer is formed at the plasma edge by the electrode biasing. In the Er gradient layer, reductions in the fluctuation amplitude, radial correlation length and turbulent particle flux are observed. These results support the theoretical models on the turbulence suppression by decorrelation due to E × B flow shear
Keywords :
plasma boundary layers; plasma fluctuations; plasma magnetohydrodynamics; plasma toroidal confinement; plasma transport processes; plasma turbulence; shear turbulence; KT-5C Tokamak; decorrelation due; electrode biasing; flow shear; fluctuation amplitude; fluctuations; gradient layer; plasma edge; radial correlation length; radial electric field; transport; turbulence; turbulence suppression; turbulent particle flux; Electrodes; Electrons; Fluctuations; Plasma confinement; Plasma measurements; Plasma temperature; Plasma transport processes; Probes; Sun; Tokamaks;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.1024260
