Mercury-free high-intensity discharge with high luminous efficacy and good colour rendering index

A mercury-free high-pressure discharge in a quartz vessel is investigated which achieves a high luminous efficacy of more than 901m W-1 and a good colour rendering index of more than 70. It is shown that the favourable properties are achieved by a combination of Xe and AlI3 as mercury is substituted...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2007-07, Vol.40 (13), p.3836-3841
Main Authors: Frankel, St, Methling, R, Hessl, H, Schneidenbachl, H, Schopp, H, Hitzschke, L, Kaning, M, Schalk, B
Format: Article
Language:English
Online Access:Get full text
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Summary:A mercury-free high-pressure discharge in a quartz vessel is investigated which achieves a high luminous efficacy of more than 901m W-1 and a good colour rendering index of more than 70. It is shown that the favourable properties are achieved by a combination of Xe and AlI3 as mercury is substituted with an admixture of TlI and TmI3. The molecular radiation of the mono-iodide TmI, which is present in large areas of the constricted temperature distribution of the plasma, dominates the spectral radiant flux.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/40/13/804