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High-pressure, non-thermal, non-equilibrium plasma sources based on dielectric barrier discharges (DBDs) are increasingly being used in various novel applications1 but the underlying discharge mechanism is not very clear. We have developed three types of DBD cells. In this work, the xenon, argon and helium gas filled coaxial DBD cells have been studied at different working conditions. In the DBDs...
Recently, the pseudospark (PS) discharge is recognized for producing electron beams with the highest combined current density and brightness of any known type of electron sources1. In the PS discharge there is fast voltage breakdown together with fast current rise and development of complex discharge with different discharge phases useful for high power plasma switches, EUV radiation, high density...
In this paper a Xenon filled coaxial dielectric barrier discharge (DBD) has been studied to understand the high pressure, non-equilibrium, nonthermal plasma discharge. A quartz coaxial DBD tube (ID: 6mm, OD: 12 mm) at 400 mbar Xenon filled pressure has been used in the experiment. Different applied voltage waveforms at 30 kHz using RF generator as well as pulse power source have been applied to the...
Pseudospark discharge is a specific type of gas discharge, which operates on the left-hand side of the hollow cathode analogy to the Paschen curve with axially symmetric parallel electrodes and central holes on the electrodes. Plasma simulation is carried out to study the initiation phase of pseudospark discharges. The pre-breakdown and breakdown phases of a pseudospark discharge are investigated...
Dielectric barrier discharges (DBDs) occur by the presence of at least one insulating layer in contact with the discharge between two planar or cylindrical electrodes connected to an AC or pulse power supply. Dielectric barrier discharge (DBD) consists of filamentary micro-discharges under nonequilibrium, atmospheric pressure plasma condition. The ignition of discharges occurs when the applied voltage...
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