Improving the efficiency of a fluorescent Xe dielectric barrier light source using short pulse excitation

Sz Beleznai, G. Mihajlik, I. Maros, L. Balázs, P. Richter

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Operation of a Xe dielectric barrier discharge lamp producing 147-172 nm VUV radiation is investigated both theoretically and experimentally. Xe gas pressure varies between 100 and 300 mbar, and the glass body of the lamp is coated with LAP (green) phosphor to convert radiation into the visible part of the spectrum. Simulation results predict improved discharge efficiencies reaching 67% when excited by a fast rise-time, short pulse (∼200 ns) driving waveform. In this case most power deposited into the plasma efficiently produces excimers, while other energy dissipation processes (ion heating, e-Xe elastic collision) are kept at a low rate. Simulation and experimental results are compared in terms of discharge efficacy and show good agreement. A lamp efficacy value as high as 80 lm W-1 is demonstrated experimentally.

Original languageEnglish
Article number115202
JournalJournal of Physics D: Applied Physics
Volume41
Issue number11
DOIs
Publication statusPublished - Jun 7 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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