Temporal VUV emission characteristics related to generations and losses of metastable atoms in xenon pulsed barrier discharge

Hideki Motomura, Ka Hong Loo, Yoshihisa Ikeda, Masafumi Jinno, Masaharu Aono

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Although xenon pulsed dielectric barrier discharge is one of the most promising substitutes for mercury low-pressure discharge for fluorescent lamps, the efficacy of xenon fluorescent lamp is not enough for practical use for general lighting. To improve the efficacy it is indispensable to clarify mechanisms of vacuum ultraviolet (VUV) emissions, which excite phosphor, from xenon discharge related to plasma characteristics. In this paper emission waveforms and temporal change of metastable atom density are measured and temporal VUV emission characteristics related to generations and losses of metastable atoms in xenon pulsed barrier discharge is investigated. It is shown that the lamp efficacy is improved by about 10% with shorter pulse in which the two VUV emission peaks in a pulse are overlapped. It is also shown that at the lower pressure of 1.3kPa metastable atoms generated during on-period of the voltage pulse are not efficiently consumed for VUV emissions in the off-period of the voltage pulse because of lower rate of three-body collision and quenching. This fact is thought to be one of the reasons why the lamp efficacy is low at lower pressure.
Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalJournal of Light and Visual Environment
Volume30
Issue number2
DOIs
Publication statusPublished - 23 Oct 2006
Externally publishedYes

Keywords

  • Dielectric barrier discharge
  • Flourescent lamp
  • Mercury-free
  • Metastable
  • VUV emission
  • Xenon

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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