Unified modelling of low-current short-length arcs between copper electrodesIn this work we present for the first time a unified model of a low-current short-length arc between copper electrodes. The model employs one-dimensional fluid description of the plasma in argon and copper vapour at atmospheric pressure and the heat transfer in the electrodes made of copper. The solution of the particle and energy conservation of electrons and heavy particles is coupled with the solution of the Poisson equation, from which the self-consistent electric field is obtained. The operation of the non-refractory cathode is based on thermo-field emission. Heat fluxes from the plasma to the electrodes are considered so that a phase change and evaporation from the cathode and a release of copper atoms into the plasma are taken into account. The influence of the copper atoms and ions on the plasma properties is analysed and discussed. The model's predictions are compared with experimental data and a qualitative agreement is obtained besides the restrictions of the one-dimensional fluid model.

]]>basic researchcopper electrodeselectric arcsnon-equilibrium plasmaplasma modelling/simulationThermal Plasma Technologybac1c563-e56f-4fa4-b505-0ceb415f42392020-08-12T10:03:10+02:002021-09-16T15:16:43+02:00enINP, TSNUShort-length arcs between copper electrodes_Fig.1The calculated current density due to thermo-field emission of electrons from a copper surface (work function of copper 4.5 eV).

]]>2020-08-28T12:58:56+02:002021-06-11T12:15:52+02:00text/csvcsv911https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/d35e2b2dShort-length arcs between copper electrodes_Fig.3Boltzmann plots for three radial positions in the midplane of the arc at arc current of 3.4 A.

]]>2020-08-31T09:57:42+02:002021-06-11T12:36:53+02:00text/csvcsv539https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/b138ce33Short-length arcs between copper electrodes_Fig.4Radial distribution of the excitation temperature T in the midplane of the arc at 3.5 A. The standard seviation is denoted by dT.

]]>2020-08-31T10:08:09+02:002021-06-11T12:15:50+02:00text/csvcsv178https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/ec45b21cShort-length arcs between copper electrodes_Fig.5Predicted properties as a function of the field enhancement factor and a current Density of 4.8e5 A/m^2 in pure argon.
a) Tc - temperature on the cathode; j_TF - current density caused by themo-field electron emission
b) In the middle of the gap: T - temperature of heavy particles, Te - electron temperature, ne - electron density;
c) Uarc - discharge voltage.
Additionally available: Ta -temperature on the anode.

]]>2020-08-31T10:12:11+02:002021-06-11T12:15:50+02:00text/csvcsv386https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/b55b1072Short-length arcs between copper electrodes_Fig.6Predicted properties as a function of the current density for FEF=200 in pure argon.
a) Components of the current density on the cathode,
b) Temperatures at the cathode (Tc) and the anode (Ta), and discharge voltage (Udisch),
c) Temperatures of heavy particles (T) and electrons (Te), and electron number
density (ne) in the middle of the gap.

]]>2020-08-31T10:24:49+02:002021-06-11T12:15:52+02:00text/csvcsv1328https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/7ea62e3cShort-length arcs between copper electrodes_Fig.7Predicted plasma composition as a function of the current density for FEF=200 with account for a release of metal vapour.

]]>2020-08-31T10:33:04+02:002021-06-11T12:15:52+02:00text/csvcsv463https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/ccc21d57Short-length arcs between copper electrodes_Fig.7_add onThe electron density as a function of the current density in pure argon for FEF=200.

]]>2020-08-31T10:30:02+02:002021-06-11T12:15:52+02:00text/csvcsv306https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/0c06378fShort-length arcs between copper electrodes_Fig.8_1Predicted plasma parameters along the interelectrode distance for FEF=200 at a current density of
5x10^5 A/m^2 in pure argon:
a) temperatures of electrons and heavy particles;
b) number densities of electrons (e), argon ions (Ar+), copper ions (Cu+);
c) electric potential.

]]>2020-08-31T10:34:12+02:002021-06-11T12:15:50+02:00text/csvcsv656281https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/80c9a381Short-length arcs between copper electrodes_Fig.8_2Predicted plasma parameters along the interelectrode distance for FEF=200 at a current density of
5x10^5 A/m^2 in the presence of copper (solid symbols):
a) temperatures of electrons and heavy particles;
b) number densities of electrons (e), argon ions (Ar+), copper ions (Cu+);
c) electric potential.

]]>2020-08-31T10:40:41+02:002021-06-11T12:36:53+02:00text/csvcsv855341https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/1d19c390Short-length arcs between copper electrodes_Fig.9aa) Spectral emission coeffcient for the radiative transition considered in the collisiona-radiative
submodel in the midpoint of the gap. The solution of the arc model for a current density of 5x10^5 A/m^2 and FEF=200
provides the input parameters.

]]>2020-08-31T11:08:36+02:002021-06-11T12:15:50+02:00text/csvcsv168https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/9127d678Short-length arcs between copper electrodes_Fig.9bb) Spectral emission coeffcient for the radiative transition considered in the experiment.

]]>2020-08-31T11:10:02+02:002021-06-11T12:15:50+02:00text/csvcsv129https://inptdat.de/dataset/unified-modelling-low-current-short-length-arcs-between-copper-electrodes/resource/8c21a8d2DKANhttps://inptdat.de