Radial profiles of the emission spectra of dc glow discharge sustained in molecular gases at medium pressures

Morávek, Matěj Jan; Schmiedt, L.; Laca, M.; Kaňka, A.; Hrachová, V.

doi:10.1088/0031-8949/2014/t161/014056

Cited by 1 publication

(3 citation statements)

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“…The argon‐oxygen DC glow discharge was sustained in a Pyrex or Silica tube. A detailed description of the apparatus used and the tube geometry can be found in our previous experimental works , . The input parameters of the model are pressure, discharge current, and wall temperature.…”

Section: Modelmentioning

confidence: 99%

“…A detailed description of the apparatus used and the tube geometry can be found in our previous experimental works. [12,47,48] The input parameters of the model are pressure, discharge current, and wall temperature. The temperature difference between the inner and outer wall under our conditions is less than 2 K. [49] It is comparable to the measurement error, therefore, the thickness of the wall was considered to be negligible.…”

Section: Experimental Set Upmentioning

confidence: 99%

“…The intensity of a longitudinal electric field E ∼ 1 V/cm can be found in a positive column of rare gases, [11] on the other hand, a typical value in molecular gases is E ∼ 10 V/cm. [12] The argon-oxygen discharge should exhibit a transition between low and high intensity of electric field.…”

Section: Introductionmentioning

confidence: 99%

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Fluid model of the positive column in argon‐oxygen direct current glow discharge

Laca

Kaňka

Schmiedt

et al. 2019

Contributions to Plasma Physics

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The positive column of argon‐oxygen direct current (DC) glow discharge was investigated using a fluid model at pressures of around 410 Pa and discharge currents from 10 to 40 mA. The model was used to study the influence of an oxygen admixture on the properties of argon discharge. The simulated intensity of the electric field strength was compared with measured values at 5% and 100% of oxygen concentration. The one‐dimensional model in a cylindrical tube is based on the drift‐diffusion approximation of particle flux and the mean‐electron‐energy approximation is used to describe the electron interaction. The model takes into account the radial profile of particle concentration, the neutral gas kinetic temperature profile, and interactions with the wall in the cylindrical glass discharge tube. It was shown that 2% of the oxygen admixture causes a significant increase in longitudinal electric field strength and gas heating.

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Section: Modelmentioning

confidence: 99%

Section: Experimental Set Upmentioning

confidence: 99%