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Summary form only given. Since the environmental awareness is increasing, the development of a high efficacy mercury-free fluorescent lamp is strongly required. Although the xenon is one of the most promising candidates for substitution of mercury, its discharge tends to constrict and the efficacy drops drastically at high input power. The authors have developed a technique to enhance the total flux...
This paper reports on obtaining a homogeneous and high luminance plasma to be applied as a planar type lamp for general purposes. Microwave frequency of 2.45 GHz was fed into the discharge chamber through a slot antenna facing to the rear quartz window. Xenon gas was filled at pressure range from 0.5 Torr to 5 Torr with 300 W of input power. A few types (transverse, inclined, longitudinal) of slot...
Xenon dielectric barrier discharges are expected to be useful as environmentally friendly light sources instead of that containing mercury. The authors have demonstrated new type of dielectric barrier discharge using double helical external electrodes (DHEL) method with xenon. The filling gas pressure ratio of Xe:Ne was 7:3, total pressure was 1.33 kPa and external electrode pitch was 10 mm. This...
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