Abstract Measurements of electric field fluctuations, Reynolds stress and poloidal flow have been performed in the boundary region of the HT-7 tokamak using a Langmuir probe array. Sheared radial electric field and poloidal flow have been found in the vicinity of the limiter and the turbulence has been clearly modified in this region. Furthermore, the electrostatic Reynolds stress component shows a radial gradient close to the velocity shear layer location. All results here indicate that the radial gradient of Reynolds stress may play an important role in the driving of poloidal flows in the plasma boundary region.
Received: 24 April 2003
Revised: 30 June 2003
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10175069).
Cite this article:
Song Mei (宋梅), Wan Bao-Nian (万宝年), Xu Guo-Sheng (徐国盛) Measurements of Reynolds stress and turbulence in the boundary plasma of the HT-7 tokamak 2004 Chinese Physics 13 369
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