Synergetic effect in a mixture of noble gases around the Paschen minimum

Despotovic, Dejan; Cvetić, Jovan; Stanković, Koviljka; Osmokrović, P.

doi:10.1063/1.4862782

Cited by 9 publications

(8 citation statements)

References 22 publications

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“…This can be explained by the elastic nature of collision processes (not valid for the molecular gases since the rotational and vibrational states can be excited). That assumption has been verified for all noble gases [8]. Those results show that derived expression for the first ionization coefficient gives the possibility for calculating the dc breakdown voltage values.…”

Section: Introductionsupporting

confidence: 65%

“…Under the condition of field absence, which otherwise has an impact on the gas constitutive partial components, those above stated components interacting between each other (in accordance with thermal equilibrium) which motion follows the Maxwell spectrum shape. That assumption has been verified for all noble gases [8]. This leads to reshaping the specter of gas charged constitutive partial components [6].…”

Section: Introductionmentioning

confidence: 74%

“…From the numerical aspect and backed by this, it is to be expected that the expression (9) yields the best fit. All stated about the interaction nature of free electrons' gas with atomic gases of the mixture components is applicable for such mixtures [8]. That is to say, the expressions (3) and (4) are valid only for certain values of the E/p ratio (Tables 1. and 2.…”

Section: Resultsmentioning

confidence: 99%

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Free‐Electron Gas Spectrum Uniqueness in the Mixture of Noble Gases

Stanković

Alimpijević

2016

Contrib. Plasma Phys.

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Gas mixtures can reach the Maxwell's specter shape in case of low-ionized mono-atomic mixtures in the weak electric field. The parameters pertaining to the Maxwell spectrum of free electrons' gas straightforwardly settle on the insulating characteristics of the examined gas mixture at the fundamental level. In this paper, a condition for breakdown has been accomplished taking as a starting point the ionization coefficients derived accordingly, as well as the conditions for breakdown in keeping with the Townsend mechanism. The dc breakdown voltage value of noble gases mixture has been measured in the experimental part of the paper. The hypothesis that the free-electron gas spectrum is unique in the noble gas mixture and is of Maxwell's type has been verified.

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Section: Introductionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

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Free‐Electron Gas Spectrum Uniqueness in the Mixture of Noble Gases

Stanković

Alimpijević

2016

Contrib. Plasma Phys.

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“…without the electrical field influence, free-electrons' gas spectral distribution (as well as other gas mixture components) is of the Maxwellian type [4,7]. Nevertheless, when such a gas mixture is found within a direct electrical field, one drift component is superpositioned in the direction of the field by thermal speeds of its charged constituting components [8,9].…”

Section: Introductionmentioning

confidence: 95%

The Maxwellian nature of free-electrons' gas spectrum of noble gases at low pressure

Alimpijević¹,

Stanković²,

Ignjatović³

et al. 2014

Vacuum

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“…20,21 Despotovic et al predicted the synergistic effect from the breakdown electron temperature of a noble gas mixture of He-Ar as well. 22 We studied the breakdown electron temperature in N 2 -O 2 mixtures for different O 2 concentrations and gas pressures and its relationship to the negative ion detachment processes. 23 This paper describes our study of the synergistic effect in the dielectric breakdown of CO 2 -O 2 mixtures from both macroscopic and microscopic perspectives.…”

Section: Introductionmentioning

confidence: 99%

Study of the synergistic effect in dielectric breakdown property of CO2–O2 mixtures

2017

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Sulfur hexafluoride, SF6, is a common dielectric medium for high-voltage electrical equipment, but because it is a potent greenhouse gas, it is important to find less environmentally harmful alternatives. In this paper we explore the use of CO2 and O2 as one alternative. We studied the synergistic effect in a mixture of CO2 and O2 from both macroscopic and microscopic perspectives. The effect leads to a dielectric strength of the mixture being greater than the linear interpolation of the dielectric strengths of the two isolated gases. We analyzed the critical reduced electric field strength, (E/N)cr, the breakdown gas pressure reduced electric field, E/p, and the breakdown electron temperature, Tb, and their synergistic effect coefficients for various CO2 concentrations and various products of the gas pressure times the gap distance (pd). A gas discharge and breakdown mechanism in a homogenous electric field is known to be controlled by the generation and disappearance of free electrons, which strongly depend on the electron temperature. The results indicate that adding a small amount of O2 to CO2 can effectively improve the value of (E/N)cr and bring a clear synergistic effect. In addition, significantly different variation trends of the synergistic effect in the E/p and Tb of CO2-O2 mixtures at various CO2 concentrations and pd values were also observed.

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Synergetic effect in a mixture of noble gases around the Paschen minimum

Cited by 9 publications

References 22 publications

Free‐Electron Gas Spectrum Uniqueness in the Mixture of Noble Gases

Free‐Electron Gas Spectrum Uniqueness in the Mixture of Noble Gases

The Maxwellian nature of free-electrons' gas spectrum of noble gases at low pressure

Study of the synergistic effect in dielectric breakdown property of CO2–O2 mixtures

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