Stable glow plasma at atmospheric pressure

Kanazawa, Susumu; Kogoma, Masuhiro; Moriwaki, Takao; Okazaki, S.

doi:10.1088/0022-3727/21/5/028

Cited by 654 publications

(344 citation statements)

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“…Such a current profile is characteristic of helium DBD operating under homogeneous mode and is referred to as the atmospheric pressure glow discharge (APGD). 42 This will be further confirmed ahead, as we discuss the typical electron and ion densities observed in APGD. It should also be noted that the current profiles for DBD with no packing, for frequencies 20 kHz [ Fig.…”

Section: Resultssupporting

confidence: 70%

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Gadkari

2017

Physics of Plasmas

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In this work, a two-dimensional numerical \ud fluid model is developed for a partially\ud packed dielectric barrier discharge (DBD) in pure helium. In\ud fluence of packing on\ud the discharge characteristics is studied by comparing the results of DBD with partial\ud packing with those obtained for DBD with no packing. In the axial partial packing\ud configuration studied in this work, the electric field strength was shown to be en\ud hanced at the top surface of the spherical packing material and at the contact points\ud between the packing and the dielectric layer. For each value of applied potential,\ud DBD with partial packing showed an increase in the number of pulses in the current\ud profile in the positive half cycle of the applied voltage, as compared to DBD with\ud no packing. Addition of partial packing to the plasma-alone DBD also led to an\ud increase in the electron and ion number densities at the moment of breakdown. The\ud time averaged electron energy profiles showed that a much higher range of electron\ud energy can be achieved with the use of partial packing as compared to no packing\ud in a DBD, at the same applied power. The spatially and time averaged values over\ud one voltage cycle also showed an increase in power density and electron energy on\ud inclusion of partial packing in the DBD. For the applied voltage parameters studied\ud in this work, the discharge was found to be consistently homogeneous and showed\ud the characteristics of atmospheric pressure glow discharge

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Section: Resultssupporting

confidence: 70%

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Gadkari

2017

Physics of Plasmas

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“…These require observation of either the voltage-charge Lissajous figures or the characteristics of the discharge current. [J Tepper, 2000;S Kanazawa., 1988;T Yokoyama, 1990] The discharge behaviour was observed for #325, 0.035 mm wire mesh and perforated aluminium sheet with 1.2 mm diameter holes, at supply voltages to the reactor of 1.2, 1.4, 1.6 and 1.8 kV for a 1.5 mm gap spacing. The gas flow rate was 1 l/min and the gas pressures was 1 bar.…”

Section: Experimental Investigationmentioning

confidence: 99%

“…At atmospheric pressure the discharge is normally unstable, and in most cases it tends to change to a filamentary discharge, [F Massines, 1998;J Tepper, 2000;S Kanazawa., 1988], depending on the feed gas, the material of the dielectric barrier, the structure of the discharge electrode, the frequency of the pulsed supply, the gap spacing and the humidity of the gas.…”

Section: Introductionmentioning

confidence: 99%

“…Several authors claim [S Kanazawa., 1988;T Yokoyama, 1990;J E Harry, 1999] however to have obtained a stable glow discharge at atmospheric pressure depending on three simple requirements (i) a source frequency above 1 kHz, (ii) the insertion of a dielectric plate (or plates) between the two metal electrodes and (iii) the use of helium as a dilution gas. The ability of helium to produce a stable and homogeneous glow discharge at atmospheric pressure is related to its low breakdown stress [Y P Raizer, 1991].…”

Section: Introductionmentioning

confidence: 99%

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Generation of a Homogeneous Glow Discharge: A Comparative Study between the Use of Fine Wire Mesh and Perforated Aluminium Electrodes

Buntat¹,

Smith²,

Razali³

2011

APR

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Ozone generation using both perforated-aluminium plate and fine-mesh stainless steel electrodes is studied, with the view to comparing the effectiveness of the two technologies in improving the stability of the glow discharge that they produce at atmospheric pressure. Electric field computations using simulation software (Ansoft-Maxwell 2D) indicate that the wire mesh generates the higher electric field strength, in contrast to an initial assumption that the perforated aluminium would be better because of its sharp-edged holes. Experimental work confirms however that the discharge configuration with perforated aluminium electrodes produces a better glow discharge stability at atmospheric pressure, showing that the electric field strength does not influence the stability of the glow discharge, as was also noted by previous authors. The perforated-aluminium plate discharge system may therefore be an effective means of improving the ozone generation and removing the pollutant gases.

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“…Atmospheric pressure dielectric barrier discharges (APDBDs) were firstly reported by Kanazawa et al in 1988 [1]. Recently, the APDBDs attracted great interests in many fields, especially in the exhaust gas treatment [2], biomedicine [3,4] fields.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Atmospheric-Pressure Dielectric Barrier Discharges Driven by Combined rf and Short-Pulse Sources in Co-Axial Electrodes

Wang

Sun²,

Nozaki³

et al. 2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

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Atmospheric-pressure discharges driven by combined rf and short-pulse sources in co-axial electrodes were investigated in this work using a one-dimensional self-consistent fluid model. It demonstrated that the plasma intensity in the rf discharge could be enhanced drastically when an additional low-duty-ratio pulse source was applied to the discharge. The study investigated how the plasma density varied with the voltage amplitude of the pulse source. Results showed that the discharge mode turned into glow mode as the pulse amplitude exceeded a critical value. Two cases were investigated on the premise that the outer electrode was electrically grounded: in the first case the positive pulse was applied to the inner electrode while in the second case the negative pulse was used instead, and the spatial discharge characteristics were compared.

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Stable glow plasma at atmospheric pressure

Cited by 654 publications

References 1 publication

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Fluid model for a partially packed dielectric barrier discharge plasma reactor

Generation of a Homogeneous Glow Discharge: A Comparative Study between the Use of Fine Wire Mesh and Perforated Aluminium Electrodes

Numerical Investigation on Atmospheric-Pressure Dielectric Barrier Discharges Driven by Combined rf and Short-Pulse Sources in Co-Axial Electrodes

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