中国物理B ›› 2004, Vol. 13 ›› Issue (3): 369-372.doi: 10.1088/1009-1963/13/3/019

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Measurements of Reynolds stress and turbulence in the boundary plasma of the HT-7 tokamak

宋梅, 万宝年, 徐国盛   

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2003-04-24 修回日期:2003-06-30 出版日期:2005-07-06 发布日期:2005-07-06
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10175069).

Measurements of Reynolds stress and turbulence in the boundary plasma of the HT-7 tokamak

Song Mei (宋梅), Wan Bao-Nian (万宝年), Xu Guo-Sheng (徐国盛)   

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2003-04-24 Revised:2003-06-30 Online:2005-07-06 Published:2005-07-06
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10175069).

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摘要： 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.

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.

Key words: Reynolds stress, poloidal flow, radial electric field, tokamak

中图分类号:  (Plasma-material interactions; boundary layer effects)

  • 52.40.Hf
52.35.Ra (Plasma turbulence) 52.30.-q (Plasma dynamics and flow) 52.25.Gj (Fluctuation and chaos phenomena) 52.55.Fa (Tokamaks, spherical tokamaks) 52.70.Ds (Electric and magnetic measurements) 52.25.Fi (Transport properties)