中国物理B ›› 2005, Vol. 14 ›› Issue (3): 560-564.doi: 10.1088/1009-1963/14/3/024

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

Plasma boundary identification in HL-2A by means of the finite current element method

游天雪, 袁保山, 刘莉, 李芳著   

  1. Southwestern Institute of Physics, Chengdu 610041, China
  • 收稿日期:2004-06-21 修回日期:2004-11-08 出版日期:2005-03-02 发布日期:2005-03-02
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10175022).

Plasma boundary identification in HL-2A by means of the finite current element method

You Tian-Xue (游天雪), Yuan Bao-Shan (袁保山), Liu Li (刘莉), Li Fang-Zhu (李芳著)   

  1. Southwestern Institute of Physics, Chengdu 610041, China
  • Received:2004-06-21 Revised:2004-11-08 Online:2005-03-02 Published:2005-03-02
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10175022).

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摘要： In this paper, the finite current element (FCE) method used in HL-2A is described. The calculation and test results show that the error of the reconstructed boundary given by the FCE method (<3mm) is smaller than that obtained by the current filament method used before (<6mm). Even if some current elements are located out of the plasma boundary, the FCE method can also identify the plasma boundary successfully. If the location of the finite current elements is changed in a certain area, the error of the reconstructed boundary is always very small. By employing a conventional PC (Pentium 4 2.4GHz), the calculation time of one set of plasma discharge parameters does not exceed 1ms. Thus, the FCE method can identify the diverted plasma configuration quickly and accurately. This is essential and important for real-time shape control in HL-2A.

Abstract: In this paper, the finite current element (FCE) method used in HL-2A is described. The calculation and test results show that the error of the reconstructed boundary given by the FCE method (<3mm) is smaller than that obtained by the current filament method used before (<6mm). Even if some current elements are located out of the plasma boundary, the FCE method can also identify the plasma boundary successfully. If the location of the finite current elements is changed in a certain area, the error of the reconstructed boundary is always very small. By employing a conventional PC (Pentium 4 2.4GHz), the calculation time of one set of plasma discharge parameters does not exceed 1ms. Thus, the FCE method can identify the diverted plasma configuration quickly and accurately. This is essential and important for real-time shape control in HL-2A.

Key words: finite current element method, boundary identification

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

  • 52.40.Hf
52.55.Fa (Tokamaks, spherical tokamaks) 52.65.-y (Plasma simulation) 52.80.-s (Electric discharges)