Self-consistency of electron-THF cross sections using electron swarm techniques

Casey, M.J.E.;De Urquijo, J.;Serkovic Loli, L.N.;Cocks, D.G.;Boyle, G.J.;Jones, D.B.;Brunger, M.J.;White, R.D.

Abstract

The drift velocity and first Townsend ionization coefficient of electrons in gaseous tetrahydrofuran are measured over the range of reduced electric fields 4-1000 Td using a pulsed-Townsend technique. The measured drift velocities and Townsend ionization coefficients are subsequently used, in conjunction with a multi-term Boltzmann equation analysis, as a further discriminative assessment on the accuracy and completeness of a recently proposed set of electron-THF vapor cross sections. In addition, the sensitivity of the transport coefficients to uncertainties in the existing cross sections is presented. As a result of that analysis, a refinement of the momentum transfer cross section for electron-THF scattering is presented, along with modifications to the neutral dissociation and dissociative electron attachment cross sections. With these changes to the cross section database, we find relatively good self-consistency between the measured and simulated drift velocities and Townsend coefficients.

Journal

Journal of Chemical Physics

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147

ISBN/ISSN

1089-7690

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Publisher

American Institute of Physics

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DOI

10.1063/1.5004717