Electric measurements in the anode area of a dc arc plasma torch with an external anode

0500678 - ÚFP 2019 RIV US eng C - Conference Paper (international conference)
Ondáč, Peter - Mašláni, Alan - Hrabovský, Milan
Electric measurements in the anode area of a dc arc plasma torch with an external anode.
IEEE Transactions on Plasma Science. Vol. Special Issue: Plenary Invited and Selected Mini-Course Papers from ICOPS 2018. Santa Fe: IEEE, 2018, č. článku 1687. ISSN 0093-3813. E-ISSN 1939-9375.
[45th IEEE International Conference on Plasma Science. Denver (US), 24.06.2018-28.06.2018]
R&D Projects: GA ČR(CZ) GC17-10246J
Institutional support: RVO:61389021
Keywords : Plasma * arc * anode * low pressure * electric probes
OECD category: Fluids and plasma physics (including surface physics)
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Floating potential of the used probes, the electric field in the plasma jet, V-A characteristics of the Langmuir probes, electron and ion saturation currents in the probes, and plasma electron temperature were measured in the anode area. Three methods were compared to obtain accurate values of the plasma electrical potential. Two methods were compared to obtain values of electric field. In addition, we tested the electrical conductivity of turbulent vortices around the plasma jet in the anode area and measured potential drops across the anode arc attachment. The results provide first experimental data on plasma electrical potential inside the plasma jet in hot anode area of plasma torches with an external anode. They help to better understand the corresponding anode processes and confirm an accuracy of a non-intrusive approach to the measurement of the plasma electric field in the anode area during the restrike mode.
Permanent Link: http://hdl.handle.net/11104/0292741