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Multiswitch Equivalent Electrical Model to Characterize Coaxial DBD Tube

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5 Author(s)
Pal, U.N. ; Central Electron. Eng. Res. Inst., Council of Sci. & Ind. Res., Pilani, India ; Gulati, P. ; Kumar, N. ; Prakash, R.
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In this paper, a quartz coaxial dielectric-barrier-discharge tube operated at different gas pressures and frequencies has been studied. A sinusoidal voltage up to 2.4 kVp with frequencies 34.5 and 47.5 kHz has been applied to the discharge electrodes for the generation of microdischarges. The experimental results confirm the filamentary nature of discharges when operated at different pressures (300, 600, and 1000 mbar) and at different frequencies (34.5 and 47.5 kHz). The relative influence of the given pressures and applied voltage waveforms on the discharge parameters has been analyzed. An equivalent electrical circuit model representing the multipeak phenomenon in the discharge has been developed, which validates the characteristics of the filamentary behavior. A series of simulations has been carried out in order to obtain the internal discharge parameters including discharge impedance which is not measurable during the experimental process. A close agreement between the simulated and experimental results has been obtained. From the experimental results and equivalent electrical circuit model, the dynamic nature of equivalent capacitance has also been reported.

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Plasma Science, IEEE Transactions on  (Volume:40 ,  Issue: 5 )