Variations in electron transport in argon with temperature near the Ramsauer-Townsend minimum

Makabe, Toshiaki; Mori, T.

doi:10.1088/0022-3727/15/8/010

Cited by 20 publications

(14 citation statements)

References 13 publications

(5 reference statements)

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“…2(b) where, at 0.078 Td,ε = 0.607 eV and ε RTM ≈ 0.606 eV according to the WMS cross-section data. (Similar behaviour of f 0 0 has been found in argon which also displays a salient RTM in Q m (see, e.g., Makabe and Mori [49]). ) At 0.12 Td both peaks of f 0 0 are equally populated ( Fig.…”

Section: Electron Energy Distribution Functionsupporting

confidence: 79%

“…Relationships between the EDFs and the transport parameters similar to those for xenon are expected to be found in other heavy inert gases and also in molecular gases that display the RTM. However, as far as krypton, argon or methane are concerned, the relevant range of electron energies and E/N s is to be shifted to values lower than those in xenon [49,55].…”

Section: Vžigmanmentioning

confidence: 99%

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Influence of the Ramsauer–Townsend minimum on the electron energy distribution function and electron transport in xenon

Žigman

2006

J. Plasma Phys.

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The electron distribution function in xenon in the low-energy region comprising the Ramsauer-Townsend minimum was obtained by solving the Boltzmann equation in the hydrodynamic approximation, for electric field to gas density ratios E/N in the range (0.01, 3) Td. The distortion of the electron distribution function due to the minimum is analysed and correlated to the behaviour of the electron transport coefficients: the drift velocity W d and the ratio of the transverse and longitudinal diffusion coefficient to mobility, D T /µ and D L /µ. The results are discussed in view of the different theoretical and experimental cross-section data used.

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Section: Electron Energy Distribution Functionsupporting

confidence: 79%

Section: Vžigmanmentioning

confidence: 99%

Influence of the Ramsauer–Townsend minimum on the electron energy distribution function and electron transport in xenon

Žigman

2006

J. Plasma Phys.

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“…Here, for a comparison or background of the discussion which follows, let us refer to similar eãects in Ar and HCl. Makabe and Mori (1982) HCl also has attachment and rotational excitation processes, further analysis is to be left to future work elsewhere.…”

Section: Resultsmentioning

confidence: 99%

Barrier effect of collisional processes on electron swarms in nitrogen

Sugawara

Satoh

Sakai

2001

J. Phys. D: Appl. Phys.

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The electron velocity distribution function (EVDF) of electron swarms in N 2 has a constricted part at an electron energy of around 2{3 eV. This feature has been explained by considering the barrier eãect of vibrational excitation collisions that prevents the gain of energy by slow electrons. In order to investigate the barrier eãect in detail further, we simulated the electron behaviour around the energy range of the barrier. We found that momentum transfer collisions also contribute to the barrier eãect in collaboration with vibrational excitation. In addition, an evaluation of the electron çow in velocity space is thought to indicate a factor by which the presence of the barrier eãect in N 2 is revealed in the EVDF; the depression of the electron interchange across the barrier is not only due to the barrier eãect itself but also due to the small electron transfer associated with the energy loss by electronic excitation.

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“…1 X lo"' V cm2, is only governed by the elastic collision. There exists, in fact, 5.4% difference between DT and DV at E / N = 1 X 10"' V cm2, Considerable attention has been given in the Ramsauer-Townsend gases to the conventional derivation of the momentum transfer cross section from the swarm approach (Crompton 1983, Makabe andMori 1982).…”

Section: Diffusion Tensor In Armentioning

confidence: 99%

Diffusion tensor of electron swarm in electric field in gases. II. The influence of the conservative inelastic collisions

Makabe

Shimoyama

1986

J. Phys. D: Appl. Phys.

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For pt.I see ibid., vol.17, p.699 (1984). An investigation of the deep structure of the electron diffusion tensor D in an isolated swarm has been developed from the Boltzmann equation as applied to the electron conservative case including inelastic collisions. It is shown that D consists of three components. They are the weighted ensemble average in the velocity space, and the two-additional terms which represent both the curvature effect due to the electric field and the scattering effect at collision. Numerical calculations in Ar have been executed to emphasise the importance of the last two terms. A difference of over 5% appears between the transverse diffusion coefficient DT and the conventional expression DV with E/N subject purely to elastic collisions due to the curvature effect. As is expected, the discrepancy between DT and DV grows with E/N where the recycling effect due to the excitation-energy barrier is included.

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Variations in electron transport in argon with temperature near the Ramsauer-Townsend minimum

Abstract: A previously developed three-term expansion method has been extended to study the electron swarm in argon in the energy range of the Ramsauer-Townsend minimum. The swarm parameters of electrons have been computed at temperatures of 89.6, 293 and 1000K in the range 1*10-21 Show more

Cited by 20 publications

References 13 publications

Influence of the Ramsauer–Townsend minimum on the electron energy distribution function and electron transport in xenon

Influence of the Ramsauer–Townsend minimum on the electron energy distribution function and electron transport in xenon

Barrier effect of collisional processes on electron swarms in nitrogen

Diffusion tensor of electron swarm in electric field in gases. II. The influence of the conservative inelastic collisions

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