Plasma backflow phenomenon in high-current vacuum arc

Based on the two-temperature magnetohydrodynamic model, a high-current vacuum arc (HCVA) in vacuum interrupters is simulated and analysed. The phenomenon of plasma backflow in arc column is found, which is ultimately ascribed to the strong magnetic pinch effect of HCVA. Due to plasma backflow, the m...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2007-10, Vol.40 (19), p.5953-5960
Main Authors: Wang, Lijun, Jia, Shenli, Zhang, Ling, Shi, Zongqian, Yang, Dingge, Gentils, Francois, Jusselin, Benoît
Format: Article
Language:English
Subjects:
Exact sciences and technology
Magnetohydrodynamics (including electron magnetohydrodynamics)
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma dynamics and flow
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Summary:Based on the two-temperature magnetohydrodynamic model, a high-current vacuum arc (HCVA) in vacuum interrupters is simulated and analysed. The phenomenon of plasma backflow in arc column is found, which is ultimately ascribed to the strong magnetic pinch effect of HCVA. Due to plasma backflow, the maximal value of ion density at the cathode side is not located at the centre of the cathode side, but at the paraxial region of the cathode side, that is to say, ion density appears to sag at the centre of the cathode side (arc column seems to be divided into two parts). The sag of light intensity is also found by experiments.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/40/19/025