Abstract
This work aimed to present the theory of dielectric breakdown of a glow discharge through the automation of gas injection (mass flow) systems with pressure control (pressure gauge) and voltage source with voltage control, in the reactor for the acquisition of rupture parameters for low-pressure glow discharges. Through the analysis of Paschen’s curves for the configuration with argon gases and atmospheric air, it was observed that the rupture potential for argon gas is lower than for atmospheric air, although the ionization potential of atmospheric air is lower about argon.
Highlights
The electric discharge on electrodes presenting a potential difference between them occurs at a well-defined combination of gas pressure, the distance between these two surfaces and the submitted voltage, as described by Paschen’s law[1]
Study of the rupture potential Vb as a function of the pressure produced by the distance between the electrodes
From the values of the rupture voltage (Vb) of the argon atmosphere and the atmospheric air discharge obtained by the LabVIEW® software, the graph presented in Fig. 12 was plotted, providing the values related to the rupture voltage study as a function of the pd product on argon atmosphere and atmospheric air, respectively
Summary
The electric discharge on electrodes presenting a potential difference between them occurs at a well-defined combination of gas pressure, the distance between these two surfaces and the submitted voltage, as described by Paschen’s law[1]. The Paschen’s curves measured for atmospheric air and argon will be presented. Possible implications for the treatment of the data obtained on the theory of dielectric rupture of gas, given ahead, will be discussed. Townsend’s model allows a good understanding of the experiment by assuming that in each collision the electron transfers all its energy to the atom, ionizing it. X = distance between electrodes) of electrons will be generated. Ionization efficiency can be explained by the Townsend’s model, which is the number of ionizations per electric field unit (Eq 1): ηη =.
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