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Summary form only given. Conventional technology for disinfection by UV irradiation is based on mercury lamps. The development of a new mercury-free UV lamp is very important due to the environmentally unfriendly nature of mercury. In present study we compared the inactivation of Bacillus subtilis spores in water by means of a developed dielectric barrier discharge-driven Xel* excilamp and a conventional...
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...
Summary form only given: Recently low-frequency (LF: 10-100 kHz) dielectric-barrier-discharge (DBD)-driven micro-plasma jet proposed by Teschke et al. is attracting interests. In this plasma jet, emission from the jet is not continuous: bright part like a "bullet" propagates along the plasma jet and its velocity is about 1000 times larger than that of gas flow. In our previous work, the...
In this paper longitudinal distribution of Ar metastable atom density and its time development have been measured by LAS (laser absorption spectroscopy) in argon microplasma jet and the relationship between its behavior and emission characteristics was studied. Thin Pylex glass tube with inside diameter of 1.25 mm was used for the nozzle and Ar gas was flowed out with flow rate of 1 to 30 L/min. Ar...
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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