Spot and diffuse mode of cathode attachments in a magnetically rotating arc plasma generator at atmospheric pressure

2019 ◽  
Vol 125 (3) ◽  
pp. 033301 ◽  
Author(s):  
Cheng Wang ◽  
Qiang Sun ◽  
Lu Sun ◽  
Zhongshan Lu ◽  
Weiluo Xia ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Generator ◽  
Arc Plasma ◽  
Diffuse Mode ◽  
Rotating Arc

Observation of Thermal Cathodic Hot Spots in a Magnetically Rotating Arc Plasma Generator

2015 ◽  
Vol 43 (10) ◽  
pp. 3716-3720 ◽  
Author(s):  
Cheng Wang ◽  
Wanwan Li ◽  
Xiaoning Zhang ◽  
Mengran Liao ◽  
Jun Zha ◽  
...  
Keyword(s):  
Hot Spots ◽  
Plasma Generator ◽  
Arc Plasma ◽  
Rotating Arc

Observation of arc modes in a magnetically rotating arc plasma generator

2017 ◽  
Vol 57 (9) ◽  
pp. 395-403 ◽  
Author(s):  
Cheng Wang ◽  
Haichao Cui ◽  
Zelong Zhang ◽  
Weiluo Xia ◽  
Weidong Xia
Keyword(s):  
Plasma Generator ◽  
Arc Plasma ◽  
Rotating Arc

Phenomena of Multiarc Roots and Parallel Arcs in a Large-Scale Magnetically Rotating Arc Plasma Generator

2013 ◽  
Vol 41 (3) ◽  
pp. 601-605 ◽  
Author(s):  
Jun Zha ◽  
Xiaoning Zhang ◽  
Zimu Xu ◽  
Cheng Wang ◽  
Beihe Du ◽  
...  
Keyword(s):  
Large Scale ◽  
Plasma Generator ◽  
Arc Plasma ◽  
Rotating Arc

Predictions of Current Attachment at Thermionic Cathode for TIG Arcs

2008 ◽  
Vol 580-582 ◽  
pp. 319-322 ◽  
Author(s):  
Manabu Tanaka ◽  
Kentaro Yamamoto ◽  
Tashiro Shinichi ◽  
John J. Lowke
Keyword(s):  
Melting Point ◽  
Work Function ◽  
Atmospheric Pressure ◽  
The Other ◽  
Numerical Calculations ◽  
Maximum Temperature ◽  
Arc Plasma ◽  
Melting Points ◽  
Thermionic Cathode ◽  
Uniform Current

Study of current attachment at thermionic cathode for TIG arc at atmospheric pressure is attempted from numerical calculations of arc-electrodes unified model. The calculations show that the maximum temperature of arc plasma close to the cathode tip for W-2% ThO2 reaches 19,000 K and it is the highest value in comparison with the other temperatures for W-2% La2O3 and W-2% CeO2, because the current attachment at the cathode tip is constricted by a centralized limitation of liquid area of ThO2 due to its higher melting point. The calculations also show that, in cases of W- 2% La2O3 and W-2% CeO2, the liquid areas of La2O3 and Ce2O3 are widely expanded at the cathode tip due to their lower melting points and then produce uniform current attachments at the cathode. It is concluded that the current attachment at thermionic cathode is strongly dependent on work function, melting point and Richardson constant of emitter materials.

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