The European Physical Journal D

, Volume 41, Issue 1, pp 143–150 | Cite as

Excessive Doppler broadening of the Hα line in a hollow cathode glow discharge

Radial distribution, influence of surface coverage and temperature effect
  • N. M. Šišović
  • G. Lj. Majstorović
  • N. KonjevićEmail author
Plasma Physics


A comparative study of the radial intensity distribution of the excessively Doppler broadened hydrogen Hα line in a hollow cathode (HC) glow discharge operated in hydrogen and argon-hydrogen gas mixtures with stainless steel (SS) and titanium (Ti) cathode is reported. The main interest of this work is focused on the dependence of radial distribution upon cathode material and cathode surface composition. The analysis of experimental radial distributions and results obtained from H+↦ metal surface interaction simulation combined with available data for H ↦ metal target interaction explains the difference between SS and Ti cathodes. These results explain also the important role of metal hydrides at the cathode surface for discharge-HC interaction. The influence of the hollow cathode temperature on the radial distribution of the excessively broadened Hα line and on the emission of Ar I and Ar II lines from discharge in argon-hydrogen gas mixture are also investigated. The increase of the excessive Doppler broadened part of the Hα line profile with HC temperature is always detected. The intensity of Ar I and Ar II lines is also used to examine the influence of small admixtures of hydrogen in argon.


32.30.Jc Visible and ultraviolet spectra 32.70-n Intensities and shapes of atomic spectral lines 52.80.Hc Glow; corona 52.70.Kz Optical (ultraviolet, visible, infrared) measurements 52.20.Hv Atomic, molecular, ion, and heavy-particle collisions 52.40.Hf Plasma-material interactions; boundary layer effects 


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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  • N. M. Šišović
    • 1
  • G. Lj. Majstorović
    • 2
  • N. Konjević
    • 1
    Email author
  1. 1.Faculty of Physics, University of BelgradeBelgradeSerbia
  2. 2.Military AcademyBelgradeSerbia

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