Elektronentransport in nichtthermischen Edelgasplasmen

Lehrke, H.; Müller, K. G.

doi:10.1515/zna-1976-0807

Cited by 5 publications

(6 citation statements)

References 9 publications

(11 reference statements)

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“…The calculated electron drift velocity is in close agreement with the measurements as well, especially with the more recent ones of Kucukarpaci and Lucas. The agreement with Boltzmann calculations of Engelhardt and Phelps (1964), Lehrke andMuller (1976), andJudd (1976) is excellent. For ease of viewing the results of these authors are not shown in figure 5 .…”

Section: Resultssupporting

confidence: 62%

Electron transport parameters and excitation rates in argon

Ferreira

Loureiro

1983

J. Phys. D: Appl. Phys.

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A self-consistent set of electron impact cross-section and of excitation and ionisation rates was obtained for argon by making some adjustments in the experimental cross-section data available from the literature and requiring that calculated and measured electron transport quantities be in agreement. The calculations were made by numerically solving the Boltzmann transport equation. Values of the ratio of the electric field to the gas number density of interest in this work are in the range from 10 to 100 Td (Townsend). The resulting final set of cross-sections obtained here is not unique but represents one of the best possible combinations which can be sought for on the basis of presently available data. Therefore, the present results are relevant for the modelling of discharges in argon and in various visible and UV laser mixtures containing high concentrations of argon atoms.

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Section: Resultssupporting

confidence: 62%

Electron transport parameters and excitation rates in argon

Ferreira

Loureiro

1983

J. Phys. D: Appl. Phys.

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“…There is a possibility that the reason for the discrepancies between the values of figure 2 and those by Brooks et a1 (1982) is the time resolution of the detection system they used. The calculated values of W of Lehrke and Muller (1976) and Makabe and Mori (1978) are about 35% smaller than the present calculated results at E/N = 100 Td. These discrepancies are due to their use of unsuitable cross-sections, especially large values of qm for electron energies larger than 5 eV.…”

Section: Drift Velocitycontrasting

confidence: 92%

“…50). The values of d were varied at constant N. The calculated values of DT/p are shown in figure 5 as a solid curve and are compared with values calculated by Frost and Phelps (1964), Pfau and Rutscher (1969) and Lehrke and Muller (1976). There are no experimental measurements of this parameter for comparison with present calculations.…”

Section: Ratio Of Transverse Diffusion Coeficient To Mobilitymentioning

confidence: 86%

“…The values of mean electron energy ( E ) were calculated as a function of distance from the cathode, as shown in figure 8 under equilibrium conditions and the mean energy at the anode ( E ~) are shown in figure 6, along with other calculated results of Lehrke and Muller (1976) and Makabe and Mori (1978). The values of ( E ) are also shown in table 3.…”

Section: Mean Electron Energymentioning

confidence: 97%

“…There are no experimental measurements of this parameter for comparison with present calculations. As mentioned above, it is believed that Pfau and Rutscher (1969) and Lehrke and Muller (1976) used unsuitable cross-sections for gm and q e , so their calculated values are probably incorrect. The same calculations were carried out in argon by the same method by the author (Nimura and Hayashi 1982).…”

Section: Ratio Of Transverse Diffusion Coeficient To Mobilitymentioning

confidence: 99%

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Calculation of swarm parameters in xenon at high E/N by a Monte Carlo simulation method

Hayashi¹

1983

J. Phys. D: Appl. Phys.

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Swarm parameters (electron drift velocities, ratios of electron radial diffusion coefficient to mobility, mean electron energies and electron energy distribution functions) have been calculated in xenon by a Monte Carlo simulation method Values of these parameters have been obtained for ratios of the electric field to the gas number density E/N from 85 to 8500 Td (E/p0=30 approximately 3000 V cm-1 Torr-1 at 0 degrees C). Calculated results were compared with available experimental and other calculated data. Calculations relating to the non-equilibrium distance d0 in front of the cathode and non-equilibrium distance near the anode were also carried out. For these calculations, elastic momentum transfer cross-sections and inelastic cross-sections up to 104 eV reported in the author's preceding paper (see ibid., vol.16, p.581-9, 1983) were used.

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Modelling of the low-pressure argon positive column

Ferreira¹,

Ricard

1983

Journal of Applied Physics

100

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Account of nonlocal ionization by fast electrons in the fluid models of a direct current glow discharge Phys. Plasmas 19, 093503 (2012) Long range temporal correlation in the chaotic oscillations of a dc glow discharge plasma Phys. Plasmas 19, 082313 (2012) Numerical simulation of operation modes in atmospheric pressure uniform barrier discharge excited by a sawtooth voltage Phys. Plasmas 19, 083505 (2012) Extraction of negative ions from pulsed electronegative capacitively coupled plasmasThe properties and operating characteristics of the positive column of a low-pressure positive column in argon have been investigated experimentally and theoretically. In the experiments the pressure was varied from 5 X lO-z to 1 Torr, the discharge current from 0.2-20 mA, and the discharge tube was 2.6 cm inside diameter. Measurements of the axial electric field, electron density and population in 3P Z metastable states are reported for various discharge conditions. A test is made of the usefulness of a two-moment theory which is applicable in the intermediate pressure range of this work, i.e., in the transition from inertia-limited to mobility-limited flow of ions to the wall, for the prediction of the operating characteristics. For this purpose, the electron excitation and ionization rates, and transport parameters were calculated from the homogeneous Boltzmann equation. The predicted similarity laws for the positive column are in reasonable agreement with the measurements only in the lower pressure region, i.e., for a pressure-radius product less than about 0.1 Torr cm. The discrepancy between theory and experiment at the higher pressure is, presumably, the result of our failure to correct the calculated ionization rate and effective electron loss rate for the effects caused by ionization from metastables and by spacecharge fields.

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Elektronentransport in nichtthermischen Edelgasplasmen

Cited by 5 publications

References 9 publications

Electron transport parameters and excitation rates in argon

Electron transport parameters and excitation rates in argon

Calculation of swarm parameters in xenon at high E/N by a Monte Carlo simulation method

Modelling of the low-pressure argon positive column

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