中国物理B ›› 2003, Vol. 12 ›› Issue (10): 1135-1139.doi: 10.1088/1009-1963/12/10/314

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

Poloidal rotation of main ions in the CT-6B tokamak

冯春华, 李赞良, 杨宣宗, 郑少白, 李文莱, 王龙   

  1. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2003-04-24 修回日期:2003-05-19 出版日期:2005-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10235010).

Poloidal rotation of main ions in the CT-6B tokamak

Feng Chun-Hua (冯春华), Li Zan-Liang (李赞良), Yang Xuan-Zong (杨宣宗), Zheng Shao-Bai (郑少白), Li Wen-Lai (李文莱), Wang Long (王龙)   

  1. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-04-24 Revised:2003-05-19 Online:2005-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10235010).

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摘要： The poloidal rotation velocity of neutral hydrogen atoms is measured using the Doppler shift of the Hα spectral line emitted in the CT-6B tokamak. The poloidal rotation of hydrogen atoms is generated through the collisions and charge-exchanges with main ions (protons). Therefore, the rotation direction of main ions can be deduced from that of neutral hydrogen atoms. The experimental results show that the main ions rotate in the electron diamagnetic drift direction, the same as the impurity ions, in the plasma core. The neutral hydrogen atoms rotate also in the electron diamagnetic drift direction in the edge region of the plasma. However, the rotation direction of main ions in the edge region cannot be judged from the experimental result due to the long mean free path of hydrogen atoms in the edge region. An inward diffusion flux of hydrogen atoms toward the torus inside with a velocity of the same order of magnitude as their poloidal rotation is also observed.

Abstract: The poloidal rotation velocity of neutral hydrogen atoms is measured using the Doppler shift of the Hα spectral line emitted in the CT-6B tokamak. The poloidal rotation of hydrogen atoms is generated through the collisions and charge-exchanges with main ions (protons). Therefore, the rotation direction of main ions can be deduced from that of neutral hydrogen atoms. The experimental results show that the main ions rotate in the electron diamagnetic drift direction, the same as the impurity ions, in the plasma core. The neutral hydrogen atoms rotate also in the electron diamagnetic drift direction in the edge region of the plasma. However, the rotation direction of main ions in the edge region cannot be judged from the experimental result due to the long mean free path of hydrogen atoms in the edge region. An inward diffusion flux of hydrogen atoms toward the torus inside with a velocity of the same order of magnitude as their poloidal rotation is also observed.

Key words: poloidal rotation, main ions, Doppler shift

中图分类号:  (Atomic, molecular, ion, and heavy-particle collisions)

  • 52.20.Hv
52.25.Fi (Transport properties) 52.55.Fa (Tokamaks, spherical tokamaks) 52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?)