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Effects of electrode biasing on fluctuations and transport in the KT-5C tokamak

2002; Institute of Electrical and Electronics Engineers; Volume: 30; Issue: 2 Linguagem: Inglês

10.1109/tps.2002.1024260

1939-9375

Cheng Wang, Ge-Sheng Pan, Changxuan Yu, Yizhi Wen, Shude Wan, Zhijiang Wang, Wandong Liu, Xuan Sun, Jun Wang, Hui Gao,

Superconducting Materials and Applications

Electrode biasing experiments are carried out on the KT-5C tokamak to investigate the effects of the radial electric field E/sub r/ on turbulence. A modestly enhanced E/sub r/ gradient layer is formed at the plasma edge by the electrode biasing. In the E/sub r/ 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 /spl times/ B flow shear.