The energy distribution of the emission spectrum from pulsed surface discharges

R.A. Fouracre, S.J. MacGregor, D.J. Fulker, A.J. Finlayson, F.A. Tuema

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


This paper describes the results of an investigation into effect of the driving current pulse duration on the spectral distribution of radiated optical energy from a surface-discharge. The optical energy radiated from a pulsed surface discharge in an SF6/Ar gas mixture over a sapphire substrate was measured in six spectral bands; namely the 200-300 nm, 300-400 nm, 400-500 nm, 500-600 nm, 600-700 nm and that contained above the 700 nm wavelength. Three current levels were investigated and the pulse duration was varied in the range 250 ns-1100 ns in steps of 250 ns. The results have shown that the driving current magnitude and pulse duration affects significantly the distribution of the output optical energy within the spectral bands of interest. The results show that the efficiency of optical emission within the 200-300 nm spectral band increases from 25% to 37% as the driving pulse duration increases from 250 ns to 1100 ns. This is in contrast to the other spectral bands
Original languageEnglish
Title of host publicationProceedings of the Electrical Insulation and Dielectric Phenomena, 2001 Conference
Number of pages3
ISBN (Print)0-7803-7053-8
Publication statusPublished - Oct 2001
EventAnnual Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) - Waterloo, Canada
Duration: 14 Oct 200117 Oct 2001


ConferenceAnnual Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)


  • dielectric substrates
  • light sources
  • sulphur compounds
  • surface discharges
  • pulse generation


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