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
王城a, 李皖皖a, 张晓宁a, 査俊b, 夏维东a
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
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.
中图分类号: (Arcs; sparks; lightning; atmospheric electricity)