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)
Southwestern Institute of Physics, P O Box 432, Chengdu 610041, China
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.
Received: 16 May 2003
Revised: 24 September 2003
Accepted manuscript online:
(Plasma diagnostic techniques and instrumentation)
Cite this article:
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) Determination of q=1 surface by the variation of pellet ablation rate on the HL-1M 2004 Chinese Physics 13 379
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