Flux and reactive contributions to electron transport in methane.

Abstract

A previously developed theoretical analysis (Nolan et al. 1997) is applied to the study of electron transport in methane for reduced electricfields in the range 1 to 1000 Td. The technique of analysis identifies the flux and reactive components of the measurable transport, without resort to the two-term approximation. A comparison of the results of the Monte Carlo method with those of a multiterm Boltzmann equation analysis (Ness and Robson 1986) shows good agreement. The sensitivity of the modelled electron transport to post-ionisation energy partitioning is studied by comparison of three ionisation energy partitioning regimes at moderate (300 Td) and high (1000 Td) values of the reduced electricfield.

Positron transport in water vapour

“…A huge difference of almost three orders of magnitude between the flux and bulk components of the longitudinal diffusion coefficient for positrons is observed. Such a difference has never been observed for electron swarms [37,38,44,50].…”

A multi-term solution of the nonconservative Boltzmann equation for the analysis of temporal and spatial non-local effects in charged-particle swarms in electric and magnetic fields

“…The ionization partition function P (q, ) (where q is the fraction of the available energy after ionization given to the ejected electron and is incident energy) is set equal to unity implying that all the fractions 0 q 1 are equiprobable. The sensitivity of the electron transport coefficients to post-ionization energy partitioning has been studied using a Monte Carlo method [43] and multi-term theory for solving the Boltzmann equation [44].…”

Boltzmann Equation Analysis of Electron Transport in a N2–O2Streamer Discharge

“…At the high energies considered in this work, assumptions on the division of energy may considerably influence transport profiles. 15,24) 3.2 Electron transport coefficients in N 2 -O 2 mixtures In Figs. 1 and 2 we display the variation of the mean energy and flux drift velocity, respectively, with the reduced electric field E=n 0 for various N 2 -O 2 mixtures.…”