Electrodeless Mercury-Free Microwave-Driven Indium-Iodide-Based High-Intensity Discharges with High Color Rendering Index (June 2012)

Author

Kaiser, Christian ; Ogun, Celal Mohan ; Kling, Rainer ; Heering, W.

Author_Institution

Light Technol. Inst., Karlsruher Inst. of Technol., Karlsruhe, Germany

Volume

41

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

77

Lastpage

81

Abstract

In this paper, a method is shown to drive indium (I)-iodide-based discharges by microwaves in a compact setup. The microwave power is coupled into the discharge by a surfatron suitable for high-intensity discharges and small lamp diameters. A broad continuum in the spectral radiant flux of the lamps is shown at rather low pressures. High color rendering indexes were reached with color coordinates close to a thermal radiator. The dependence of the luminous flux on the lamps´ filling condition is investigated. Buffering the discharge with elemental iodine decreases the discharges maintenance power.

Keywords

electrodeless lamps; high-frequency discharges; indium compounds; mercury (metal); plasma devices; Hg; InI; color coordinates; electrodeless mercury-free microwave discharge; high color rendering index; indium-iodide-based high-intensity discharges; lamp filling condition; lamp spectral radiant flux; low pressure condition; luminous flux; microwave power; small lamp diameters; surfatron discharge; thermal radiator; Color; Discharges (electric); High intensity discharge lamps; Maintenance engineering; Microwave devices; Microwave imaging; Plasmas; Plasma applications; plasma devices; plasma generation; plasma loaded waveguides;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2012.2226755

Filename

6361486