Analysis of Discharge Parameters in Xenon-Filled Coaxial Dbd Tube
IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 39, NO. 6, JUNE 2011
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Analysis of Discharge Parameters in Xenon-Filled Coaxial DBD Tube
Udit Narayan Pal, Member, IEEE, Pooja Gulati, Niraj Kumar, Mahesh Kumar, M. S. Tyagi, B. L. Meena, A. K. Sharma, and Ram Prakash
Abstract—In this paper, a xenon-filled coaxial dielectric barrier discharge (DBD) has been studied to understand the high-pressure nonequilibrium nonthermal plasma discharge. A quartz coaxial DBD tube (ID: 6 mm, OD: 12 mm) at 400-mbar xenon-filled pressure has been used in the experiment. A unipolar pulselike voltage up to a −6-kV peak working at 30 kHz has been applied to the discharge electrodes for the generation of microdischarges. A single discharge is observed per applied voltage pulse. Visual images of the discharge and electrical waveform confirm the diffused-type discharges. The knowledge obtained by dynamic processes of DBDs in the discharge gap explains quantitatively the mechanism that is obtained in the ignition, development, and extinction of DBDs. The behavior of different discharge parameters has also been analyzed. From the experimental results and equivalent electrical circuit, the dynamic nature of equivalent capacitance has been reported. The relative intensity analysis of the Xe peak in the optical emission spectra (172 nm) has also been carried out for different supplied powers, and it is found that the radiation power has increased with supplied power. Index Terms—Dielectric barrier discharge (DBD), equivalent capacitance, high-pressure plasma, ignition and extinction of discharge, nonequilibrium discharge, nonthermal discharge.
I. I NTRODUCTION HE HIGH-PRESSURE nonequilibrium nonthermal discharges based on dielectric barrier discharges (DBDs) are rapidly becoming an important technological component in medical and material processing applications. The DBDs, also referred to as silent discharges, are generated in discharge configuration with at least one dielectric barrier
1475
Analysis of Discharge Parameters in Xenon-Filled Coaxial DBD Tube
Udit Narayan Pal, Member, IEEE, Pooja Gulati, Niraj Kumar, Mahesh Kumar, M. S. Tyagi, B. L. Meena, A. K. Sharma, and Ram Prakash
Abstract—In this paper, a xenon-filled coaxial dielectric barrier discharge (DBD) has been studied to understand the high-pressure nonequilibrium nonthermal plasma discharge. A quartz coaxial DBD tube (ID: 6 mm, OD: 12 mm) at 400-mbar xenon-filled pressure has been used in the experiment. A unipolar pulselike voltage up to a −6-kV peak working at 30 kHz has been applied to the discharge electrodes for the generation of microdischarges. A single discharge is observed per applied voltage pulse. Visual images of the discharge and electrical waveform confirm the diffused-type discharges. The knowledge obtained by dynamic processes of DBDs in the discharge gap explains quantitatively the mechanism that is obtained in the ignition, development, and extinction of DBDs. The behavior of different discharge parameters has also been analyzed. From the experimental results and equivalent electrical circuit, the dynamic nature of equivalent capacitance has been reported. The relative intensity analysis of the Xe peak in the optical emission spectra (172 nm) has also been carried out for different supplied powers, and it is found that the radiation power has increased with supplied power. Index Terms—Dielectric barrier discharge (DBD), equivalent capacitance, high-pressure plasma, ignition and extinction of discharge, nonequilibrium discharge, nonthermal discharge.
I. I NTRODUCTION HE HIGH-PRESSURE nonequilibrium nonthermal discharges based on dielectric barrier discharges (DBDs) are rapidly becoming an important technological component in medical and material processing applications. The DBDs, also referred to as silent discharges, are generated in discharge configuration with at least one dielectric barrier