中国物理B ›› 2004, Vol. 13 ›› Issue (3): 379-383.doi: 10.1088/1009-1963/13/3/021

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Determination of q=1 surface by the variation of pellet ablation rate on the HL-1M

董贾福, 石秉仁, 李伟, 罗俊林, 刘仪, 付柄忠, 董云波, 肖正贵, 郑银甲, 秦运文   

  1. Southwestern Institute of Physics, P O Box 432, Chengdu 610041, China
  • 收稿日期:2003-05-16 修回日期:2003-09-24 出版日期:2004-03-06 发布日期:2005-07-06

Determination of q=1 surface by the variation of pellet ablation rate on the HL-1M

Dong Jia-Fu (董贾福), Shi Bing-Ren (石秉仁), Li Wei (李伟), Luo Jun-Lin (罗俊林), Liu Yi (刘仪), Fu Bing-Zhong (付柄忠), Dong Yun-Bo (董云波), Xiao Zheng-Gui (肖正贵), Zheng Yin-Jia (郑银甲), Qin Yun-Wen (秦运文)   

  1. Southwestern Institute of Physics, P O Box 432, Chengdu 610041, China
  • Received:2003-05-16 Revised:2003-09-24 Online:2004-03-06 Published:2005-07-06

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摘要： Strong drop of Hα emission has been observed on the HL-1M tokamak by means of a detector array while a pellet crosses the q=1 surface. In this article, the q=1 surface has been determined precisely by the interval and the shape of the Hα emission striations on the pellet trajectory due to the variation of pellet ablation rate. The q-profile and current density distribution at the plasma centre region have been calculated according to the pellet ablation rate and the magnetic shear feature.

关键词: q=1 surface, pellet, Hα emission, ablation rate

Abstract: Strong drop of $H\alpha$ emission has been observed on the HL-1M tokamak by means of a detector array while a pellet crosses the q=1 surface. In this article, the q=1 surface has been determined precisely by the interval and the shape of the Hα emission striations on the pellet trajectory due to the variation of pellet ablation rate. The q-profile and current density distribution at the plasma centre region have been calculated according to the pellet ablation rate and the magnetic shear feature.

Key words: q=1 surface, pellet, Hα emission, ablation rate

中图分类号:  (Tokamaks, spherical tokamaks)

  • 52.55.Fa
52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?) 52.70.-m (Plasma diagnostic techniques and instrumentation)