INP

Leibniz Institute for Plasma Science and Technology
Felix-Hausdorff-Str. 2
17489 Greifswald
GERMANY

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The Leibniz Institute for Plasma Science and Technology (INP) is the largest non-university institute in the field of low temperature plasmas, their basics and technical applications in Europe. The institute carries out research and development from idea to prototype. The topics focus on the needs of the market. At present, plasmas for materials and energy as well as for environment and health are the focus of interest.

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Creative Commons Attribution 4.0 International (CC BY 4.0)
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Reversal of the electric field and the anode fall in DC arcs in air during contact opening

Thermal Plasma Technology

The dataset contains results of a unified one-dimensional model of an arc plasma in air, between copper electrodes, that includes the change of the gap distance. The occurance of multiple reversals of the electric field and the anode voltage drop is observed. The evolution of the spatial distribution of the electron and heavy particle temperatures with the gap distance and the opening speed is also studied. The model quantitatively predicts a number of plasma properties under conditions that are relevant to the contact separation in low-voltage switching devices.

unified description
microarc
copper electrodes
anode fall
field reversal
FieldValue
Group
INP
Authors
Baeva, Margarita
Release Date
2024-05-24
Identifier
7fb50ba4-38ca-471d-b2d4-7b6e17ee9c04
Permanent Identifier (DOI)
10.34711/inptdat.830
Permanent Identifier (URI)
https://www.inptdat.de/node/830
Is supplementing
10.1088/1361-6463/ad5c73
Plasma Source Name
microarc
Plasma Source Application
switching devices
Plasma Source Specification
DC
atmospheric pressure
thermal
Plasma Source Properties

DC electric arc between copper electrodes of 10 mm length in atmospheric-pressure air. The inter-electrode distance is varied from 20 µm up to 1 mm at a constant current of 0.88 A.
Plasma Medium Name
air
Plasma Medium Properties

Air plasma, not contaminated by vapours released from the electrodes. The plasma chemistry involves 11 species (e, N2, O2, NO, N, O, N2+, O2+, NO+, N+, and O+). It is assumed that the plasma behaves like a fluid, in which the heavy particles (neutrals and ions) are in thermal equilibrium at a common temperature T, while the electrons are characterized by a Maxwellian velocity distribution function with a temperature Te.
Plasma Diagnostics Name
unified fluid modelling
fluid-Poisson model
Plasma Diagnostics Properties

The governing equations include particle balance equations for electrons as well as all considered heavy species, heat balance equations for the gas and electrode temperatures, the electron energy balance equation and Poisson's equation for the electric potential.
Language
English
License
Creative Commons Attribution 4.0 International (CC BY 4.0)
Public Access Level
Public
Contact Name
Margarita Baeva
Contact Email
baeva@inp-greifswald.de

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