Ionization Coefficient in Gases under Nonuniform Electric Fields.

  • Date Hiroyuki
    College of Medical Technology, Hokkaido University, Sapporo 060-0812, Japan
  • Ikuta Nobuaki
    Chiba Institute of Technology, Tsudanuma, Narashino 275-0016, Japan
  • Kondo Keiichi
    Anan College of Technology, Anan, Tokushima 774-0017, Japan
  • Satoh Kohki
    Muroran Institute of Technology, Muroran 050-8585, Japan
  • Shimozuma Mitsuo
    College of Medical Technology, Hokkaido University, Sapporo 060-0812, Japan
  • Tagashira Hiroaki
    Muroran Institute of Technology, Muroran 050-8585, Japan

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A one-dimensional nonuniform electric field model between parallel plane electrodes is used to study the behavior of electron swarms in spatially distorted electric fields such as that in the dc-sheath region near the anode. We investigate electron kinetics in the nonuniform field, taking into account the α-parameter associated with the ionization and the drift processes of electrons. The general expression of the α-parameter in the Boltzmann equation analysis using the arrival-time spectra (ATS) method is presented. Then, a demonstration of the swarm behavior is carried out using a Monte Carlo simulation to examine the validity of the parameter description.

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