Ionization coefficients in helium, neon and helium-neon mixtures

Dutton, J.; Hughes, M.H.; Tan, B C

doi:10.1088/0022-3700/2/8/310

Cited by 19 publications

(2 citation statements)

References 10 publications

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“…The formula is slightly adjusted to fit our experimental results better-blue dashed line. The experimental data of Kruithof (taken from Dutton's compilation [22]) and Jelenak et al [3] are shown as open triangles and circles, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ionization coefficients for argon in a micro-discharge

Kuschel

Stefanović

Malović

et al. 2013

Plasma Sources Sci. Technol.

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Ionization coefficients are measured for electrons in a dc micro-discharge in argon from optical emission profiles. The micro-discharge is operated in the Townsend regime between two parallel-plate electrodes. Axial profiles of emission are obtained with sufficient resolution to provide spatial ionization coefficients. The measured coefficients agree very well with the data obtained from other sources, indicating the operation of the discharge in the Townsend regime and also that Townsend mechanisms do not need extension to describe such discharges.

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Section: Resultsmentioning

confidence: 99%

Ionization coefficients for argon in a micro-discharge

Kuschel

Stefanović

Malović

et al. 2013

Plasma Sources Sci. Technol.

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“…The Townsend ionization coefficient α as a function of pressure and reduced electric field strength (E/N) has been thoroughly studied and determined in pure He [31][32][33][34] and pure N 2 [35][36][37][38]. At gas pressures relevant for APPJs i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of first Townsend ionization coefficient in mixtures of He and N₂

Talviste

Paris

Raud

et al. 2021

J. Phys. D: Appl. Phys.

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First Townsend ionization coefficient α in gas mixture of He with N2 is relevant for modeling of the development and chemical activity of atmospheric pressure plasma jets. This study determined α from measurements of current versus electrode separation in a steady-state non-self-sustaining Townsend discharge set-up. The measurements were carried out in absolute pressure range of 10–800 Torr and reduced electric field E/N range of 20–1000 Td. The effect of the N2 concentration in the gas mixture on the density normalized ionization coefficient α/N depended on the reduced electric field strength E/N. At E/N values below 200 Td, increased N2 content reduced the α/N while at E/N values above 200 Td, increased N2 content increased the plateau value of α/N. Reasonably good coincidence was observed between calculation performed with Bolsig+ and measured α/N. The discrepancy between experimental results and calculations at N2 percentage in the mixture below 5% and E/N values below 200 Td can be attributed to the Penning effect.

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