Electron swarm transport coefficients in H2O - He mixtures: Experiment and calculations

POSTER

Abstract

In this presentation we report recent measurements of electron swarm transport coefficients using the pulsed-Townsend technique for mixtures of water and helium over the range of applied fields E/N from 0-200Td. Comparison is made with transport coefficients calculated using a multi-term Boltzmann equation solution and recently proposed electron-water cross-section sets. This represents a new and more discriminative test on the accuracy and consistency of such sets. Negative differential conductivity is observed for a small window of mixture ratios, even though the pure gases themselves do not demonstrate NDC. Similar interesting effects are observed in the ionization rates as a function of the mixture ratios. The origin of these behaviours will be discussed.

*Work supported by the Australian Research Council (DP and COE schemes) and by PAPIIT-UNAM IN 116111.

Authors

  • Ron White

    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville
    • ARC Centre for antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville 4810, Australia
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, Australia
    • Departamentos de Energ\'ia y Ciencias B\'asicas, Universidad Aut\'onoma Metropolitana, M\'exico
    • Instituto de Ciencias F\'isicas, UNAM, M\'exico
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University

  • A.M. Ju\'arez

    • Instituto de Ciencias F\'isicas, UNAM, M\'exico

  • Ron White

    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville
    • ARC Centre for antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville 4810, Australia
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, Australia
    • Departamentos de Energ\'ia y Ciencias B\'asicas, Universidad Aut\'onoma Metropolitana, M\'exico
    • Instituto de Ciencias F\'isicas, UNAM, M\'exico
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University

  • E. E. Basurto

    • Departamentos de Energ\'ia y Ciencias B\'asicas, Universidad Aut\'onoma Metropolitana, M\'exico

  • K.F. Ness

    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, Australia

  • R.E. Robson

    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, Australia

  • Ron White

    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville
    • ARC Centre for antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville 4810, Australia
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University, Townsville, Australia
    • Departamentos de Energ\'ia y Ciencias B\'asicas, Universidad Aut\'onoma Metropolitana, M\'exico
    • Instituto de Ciencias F\'isicas, UNAM, M\'exico
    • ARC Centre for Antimatter-Matter Studies, School of Engineering and Physical Sciences, James Cook University

  • M.J. Brunger

    • ARC Centre for Antimatter-Matter Studies, School of Chemical and Physical Sciences, Flinders University, Adelaide, Australia