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Arc Root Attachment on the Anode Surface of Arc Plasma Torch Observed with a Novel Method |
| PAN Wen-Xia1;LI Teng1;MENG Xian1;CHEN Xi2;WU Cheng-Kang1 |
| 1Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080
2Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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PAN Wen-Xia, LI Teng, MENG Xian et al 2005 Chin. Phys. Lett. 22 2805-2898 |
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Abstract The arc-root attachment on the anode surface of a dc non-transferred arc plasma torch has been successfully observed using a novel approach. A specially designed copper mirror with a boron nitride film coated on its surface central-region is employed to avoid the effect of intensive light emitted from the arc column upon the observation of weakly luminous arc root. It is found that the arc-root attachment is diffusive on the anode surface of the argon plasma torch, while constricted arc roots often occur when hydrogen or nitrogen is added into argon as the plasma-forming gas.
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| Keywords:
52.80.Mg
52.70.Kz
52.50.Nr
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Published: 01 November 2005
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| PACS: |
52.80.Mg
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(Arcs; sparks; lightning; atmospheric electricity)
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52.70.Kz
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(Optical (ultraviolet, visible, infrared) measurements)
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52.50.Nr
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(Plasma heating by DC fields; ohmic heating, arcs)
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