Visible and VUV images of dielectric barrier discharges in Xe

R. P. Mildren, R. J. Carman, I. S. Falconer

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We have recorded short exposure images of visible and vacuum ultraviolet (VUV) emission from a Xe dielectric barrier discharge lamp, and investigated the effects of excitation by fast rising pulse and sinusoidal voltage waveforms on the discharge structure. The images from the pulsed discharge are essentially uniform over the active electrode area unlike the sinusoidal discharge which is filamentary. By investigating a single filament discharge, it is also found that a large fraction (>90%) of the total visible and VUV emission for sinusoidal excitation is generated from regions outside the filament. The images suggest that the VUV is generated from surface discharges, or 'feelers', which branch out laterally from the filaments. Model calculations suggest that surface or volume discharges, in which the current density is much lower than for filamentary discharges, generate VUV emission more efficiently due to the reduced rate for multi-step electron excitation of Xe* species.

LanguageEnglish
Pages3378-3382
Number of pages5
JournalJournal of Physics D: Applied Physics
Volume34
Issue number23
DOIs
Publication statusPublished - 7 Dec 2001

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Vacuum
vacuum
ultraviolet emission
Discharge lamps
Surface discharges
filaments
Current density
excitation
Electrodes
Electrons
Electric potential
luminaires
waveforms
current density
electrodes
electric potential
pulses
electrons

Cite this

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abstract = "We have recorded short exposure images of visible and vacuum ultraviolet (VUV) emission from a Xe dielectric barrier discharge lamp, and investigated the effects of excitation by fast rising pulse and sinusoidal voltage waveforms on the discharge structure. The images from the pulsed discharge are essentially uniform over the active electrode area unlike the sinusoidal discharge which is filamentary. By investigating a single filament discharge, it is also found that a large fraction (>90{\%}) of the total visible and VUV emission for sinusoidal excitation is generated from regions outside the filament. The images suggest that the VUV is generated from surface discharges, or 'feelers', which branch out laterally from the filaments. Model calculations suggest that surface or volume discharges, in which the current density is much lower than for filamentary discharges, generate VUV emission more efficiently due to the reduced rate for multi-step electron excitation of Xe* species.",
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Visible and VUV images of dielectric barrier discharges in Xe. / Mildren, R. P.; Carman, R. J.; Falconer, I. S.

In: Journal of Physics D: Applied Physics, Vol. 34, No. 23, 07.12.2001, p. 3378-3382.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Mildren, R. P.

AU - Carman, R. J.

AU - Falconer, I. S.

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