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Summary form only given. This contribution deals with the time resolved diagnostics of a non thermal plasma source initially developed at GREMI for biomedical applications. The set up, designed as Plasma Gun1, consists in a cylindrical Dielectric Barrier Discharge reactor flushed with neon or helium at flow rates of a few tens of cm^.min"1, and powered by fast rising voltage pulse of nanosecond...
. Microplasma arrays operating in helium in a DC regime have been produced in silicon microreactors. Cathode boundary layer (CBL) type microdevices were elaborated using clean room facilities and semiconductor processing techniques. Ignition of the micro-discharge arrays having either 50 or 100 m diameter cavities was studied. Two different structures (isotropically etched or anisotropically...
This paper reports on a new device based on very short pulsed dielectric barrier discharge (DBD), generating plasmas over very long distances (~ m) at atmospheric pressure consisting of plasma bullets close to the type of those reported by Laroussi. These plasma balls are traveling at very high speed, between 106 and 108 cm/s, in flexible dielectric tube at the end of which there is generation of...
Summary form only given. As mercury is a non environmental friendly element, many efforts are made in the field of light sources in order to replace Mercury-based lamps. This contribution deals with the potentialities of Neon Xenon discharges for replacing Mercury ones used in cold hollow cathodes fluorescent tubes. Interest of pulsed excitation (pulse duration: few mus; pulse frequency: few kHz)...
Summary form only given. Liquid sprays analysis, as those generated by fuel injection systems, implies diagnosis procedures able to produce information for matter in different phases from liquid to vapor. The high speed sprays produced by the fuel injection systems, need a fast and reliable diagnosis technology. Previous works on N2 cryogenic jets in a high pressure chamber had shown that the use...
Summary form only given. The European standard 2002/96/CE imposes to remove mercury from discharge lamps, which include signs for public lighting. A possible alternative is to use a binary mixture of neon and xenon, excited with a pulsed power supply. In this work, the influence of mixture pressure on lighting performances is studied. An adapted sign is continuously flushed so that pressure and proportion...
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