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Third-order transport coefficient tensor of electron swarms in noble gases
The European Physical Journal D ( IF 1.8 ) Pub Date : 2020-04-01 , DOI: 10.1140/epjd/e2020-100574-y Ilija Simonović , Danko Bošnjaković , Zoran Lj. Petrović , Ronald D. White , Saša Dujko
中文翻译:
稀有气体中电子群的三阶输运系数张量
更新日期:2020-04-01
The European Physical Journal D ( IF 1.8 ) Pub Date : 2020-04-01 , DOI: 10.1140/epjd/e2020-100574-y Ilija Simonović , Danko Bošnjaković , Zoran Lj. Petrović , Ronald D. White , Saša Dujko
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.Graphical abstract
中文翻译:
稀有气体中电子群的三阶输运系数张量