Influence of H<SUB>2</SUB> additive on Hg/Ar gas mixture discharges: Boltzmann equation analyses

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  • Sawada Sadao
    Department of Electrical Engineering, Faculty of Engineering, Hokkaido University
  • Sakai Yosuke
    Department of Electrical Engineering, Faculty of Engineering, Hokkaido University
  • Tagashira Hiroaki
    Department of Electrical Engineering, Faculty of Engineering, Hokkaido University
  • Ohtani Kastuya
    Osram-Melco Corporation

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  • Hg/Ar混合ガス放電に及ぼすH<SUB>2</SUB>混入の影響: ボルツマン方程式解析

Abstract

The electron swarm parameters in Hg/Ar and Hg/Ar: 0.1%H2 mixtures are analyzed using a Boltzmann equation in which the generation of secondary electrons through Penning and cumulative ionization, and collisions between two metastable Hg (Hg*) atoms are taken properly into consideration. The present values of the Townsend first ionization coefficient and the concentration of Hg* agree well with the experimental values of Burgumann et al and Bigio respectively. It is shown that mixing 0.1%H2 in Hg/Ar lowers the ionization coefficient significantly. This lowering effect is discussed how it influences the characteristics of discharge lamps.

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