Third-order transport coefficient tensor of electron swarms in noble gases

Simonović, Ilija, Bošnjaković, Danko, Petrović, Zoran Lj., White, Ronald D., and Dujko, Saša (2020) Third-order transport coefficient tensor of electron swarms in noble gases. The European Physical Journal D, 74. 63.

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Abstract

In this work we extend a multi term solution of the Boltzmann equation for electrons in neutral gases to consider the third-order transport coefficient tensor. Calculations of the third-order transport coefficients have been carried out for electrons in noble gases, including helium (He), neon (Ne), argon (Ar), krypton (Kr) and xenon (Xe) as a function of the reduced electric field, E/n0 (where E is the electric field while n0 is the gas number density). Three fundamental issues are considered: (i) the correlation between the longitudinal component of the third-order transport tensor and the longitudinal component of the diffusion tensor, (ii) the influence of the third-order transport coefficients on the spatial profile of electron swarm, and (iii) the errors associated with the two term approximation for calculating the third-order transport coefficients for electron swarms in noble gases. It is found that a very strong correlation exists between the longitudinal components of the third-order transport coefficient tensor and diffusion tensor for the higher values of E/n0. The effects of the third-order transport coefficients on the spatial profile of electron swarms are the most pronounced for noble gases with the Ramsauer-Townsend minimum in the cross sections for elastic scattering. The largest errors of two term approximation are observed in the off-diagonal elements of the third-order transport coefficient tensor in Ar, Kr and Xe for the higher values of E/n0.

Item ID: 67219
Item Type: Article (Research - C1)
ISSN: 1434-6079
Copyright Information: © 2020, EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature.
Funders: Ministry of Education, Science and Technological Development of the Republic of Serbia (RS), Serbian Academy of Sciences and Art, Australian Research Council (ARC)
Projects and Grants: RS No. ON171037 and III41011, Serbian Academy of Sciences and Art Project 155, ARC DP180101655
Date Deposited: 20 May 2021 04:13
FoR Codes: 51 PHYSICAL SCIENCES > 5102 Atomic, molecular and optical physics > 510201 Atomic and molecular physics @ 100%
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