中国物理B ›› 2015, Vol. 24 ›› Issue (6): 65206-065206.doi: 10.1088/1674-1056/24/6/065206

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

Evolution of magnetically rotating arc into large area arc plasma

王城a, 李皖皖a, 张晓宁a, 査俊b, 夏维东a   

  1. a Department of Thermal Science and Energy Engineering, University of Science and Technology, Hefei 230027, China;
    b Hefei General Machinery Research Institute, Hefei 230027, China
  • 收稿日期:2014-10-16 修回日期:2015-01-12 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11035005, 11475174, and 50876101) and the Science Instrument Foundation of the Chinese Academy of Sciences (Grant No. Y201162).

Evolution of magnetically rotating arc into large area arc plasma

Wang Cheng (王城)a, Li Wan-Wan (李皖皖)a, Zhang Xiao-Ning (张晓宁)a, Zha Jun (査俊)b, Xia Wei-Dong (夏维东)a   

  1. a Department of Thermal Science and Energy Engineering, University of Science and Technology, Hefei 230027, China;
    b Hefei General Machinery Research Institute, Hefei 230027, China
  • Received:2014-10-16 Revised:2015-01-12 Online:2015-06-05 Published:2015-06-05
  • Contact: Xia Wei-Dong E-mail:xiawd@ustc.edu.cn
  • About author:52.80.Mg; 52.70.Ds; 52.50.Dg
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11035005, 11475174, and 50876101) and the Science Instrument Foundation of the Chinese Academy of Sciences (Grant No. Y201162).

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摘要：

An arc channel tends to shrink due to its conductivity increasing with the increase of temperature. In this study, to generate large area arc plasma, we construct a magnetically rotating arc plasma generator, which mainly consists of a lanthanide tungsten cathode (13 mm in diameter), a concentric cylindrical graphite anode chamber (60 mm in diameter) and a solenoid coil for producing an axial magnet field. By controlling the cold gas flow, the magnetically rotating arc evolves from constricted mode to diffuse mode, which almost fills the whole arc chamber cross section. Results show that the diffuse arc plasma has better uniformity and stability. The formation mechanism of large area arc plasma is discussed in this paper.

关键词: magnetically rotating arc, diffuse arc, dispersed arc

Abstract:

An arc channel tends to shrink due to its conductivity increasing with the increase of temperature. In this study, to generate large area arc plasma, we construct a magnetically rotating arc plasma generator, which mainly consists of a lanthanide tungsten cathode (13 mm in diameter), a concentric cylindrical graphite anode chamber (60 mm in diameter) and a solenoid coil for producing an axial magnet field. By controlling the cold gas flow, the magnetically rotating arc evolves from constricted mode to diffuse mode, which almost fills the whole arc chamber cross section. Results show that the diffuse arc plasma has better uniformity and stability. The formation mechanism of large area arc plasma is discussed in this paper.

Key words: magnetically rotating arc, diffuse arc, dispersed arc

中图分类号:  (Arcs; sparks; lightning; atmospheric electricity)

  • 52.80.Mg
52.70.Ds (Electric and magnetic measurements) 52.50.Dg (Plasma sources)