Radial structure of a low-frequency atmospheric-pressure glow discharge in helium

Mangolini, Lorenzo; Orlov, K. E.; Kortshagen, Uwe R.; Heberlein, J.; Kogelschatz, U.

doi:10.1063/1.1458684

Cited by 155 publications

(127 citation statements)

References 10 publications

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“…The manifestation of multiple breakdowns per half cycle is also addressed, because it is in close relation with the power consumption. Such additional breakdown pulses can be due to spatially separated breakdowns, as was demonstrated by Mangolini et al, 1 or can be due to temporally separated breakdowns, as was demonstrated by Shin et al 2 The investigation in the present letter concerns only the temporally separated breakdowns. Based on these studies we can obtain a clear understanding of the governing mechanisms in the discharge.…”

mentioning

confidence: 74%

The influence of impurities on the performance of the dielectric barrier discharge

Martens

Bogaerts

Brok

et al. 2010

Applied Physics Letters

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In this letter, we investigate the effect of various levels of nitrogen impurity on the electrical performance of an atmospheric pressure dielectric barrier discharge in helium. We illustrate the different current profiles that are obtained, which exhibit one or more discharge pulses per half cycle and evaluate their performance in ionizing the discharge and dissipating the power. It is shown that flat and broad current profiles perform the best in ionizing the discharge and use the least amount of power per generated charged particle.

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mentioning

confidence: 74%

The influence of impurities on the performance of the dielectric barrier discharge

Martens

Bogaerts

Brok

et al. 2010

Applied Physics Letters

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“…Two discharge regimes are discussed for these DBDs, operation in glow and Townsend mode [13]. At elevated pressure and operation in noble gases these devices can be observed to operate in a so called 'glow' or 'pseudo-glow' regime and are in that case characterised as atmospheric pressure glow discharges (APGD) [10,11,12]. Differing from the microplasma array these DBD's are typically set up in plane-parallel geometry with electrode gaps of mm dimension and diameters of several centimetres.…”

Section: Discharge Modementioning

confidence: 99%

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Boettner¹,

Waskoenig²,

O’Connell³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. The spatial dynamics of the optical emission from an array of 50 times 50 individual micro cavity plasma devices are investigated. The array is operated in argon and argon-neon mixtures close to atmospheric pressure with an AC voltage. The optical emission is analysed with phase and space resolution. It has been found that the emission is not continuous over the entire AC period, but occurs once per half period. Each of the observed emission phases shows a self-pulsing of the discharge, with several bursts of emission of fixed width and repetition rate. The number of emission bursts depends on applied voltage and frequency. Spatially resolved measurements prove that the emission bursts are formed by overlapping emission pulses from single discharge cavities. Intensity differences between positive and negative half-wave can be interpreted through spatially resolved measurements of single discharge cavities.

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“…A thicker dielectric reduces the observed current peak and shifts the operating point along the subnormal branch of the current voltage characteristic from a glow-like towards a more Townsend-like appearance. Detailed 2D models [30] could also reproduce observed radially moving current fronts during the ignition phase [50] and transitions from an initially filamentary to a diffuse discharge. This can be achieved by increasing the operating frequency or the applied voltage or by decreasing the permittivity of the dielectric.…”

Section: Numerical Modelling Of Diffuse Vbdsmentioning

confidence: 99%

Collective phenomena in volume and surface barrier discharges

Kogelschatz

2010

J. Phys.: Conf. Ser.

105

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Abstract. Barrier discharges are increasingly used as a cost-effective configuration to produce non-equilibrium plasmas at atmospheric pressure. This way, copious amounts of electrons, ions, free radicals and excited species can be generated without significant heating of the background gas. In most applications the barrier is made of dielectric material. Major applications utilizing mainly dielectric barriers include ozone generation, surface cleaning and modification, polymer and textile treatment, sterilization, pollution control, CO 2 lasers, excimer lamps, plasma display panels (flat TV screens). More recent research efforts are devoted to biomedical applications and to plasma actuators for flow control. Sinusoidal feeding voltages at various frequencies as well as pulsed excitation schemes are used. Volume as well as surface barrier discharges can exist in the form of filamentary, regularly patterned or diffuse, laterally homogeneous discharges. The physical effects leading to collective phenomena in volume and surface barrier discharges are discussed in detail. Special attention is paid to selforganization of current filaments and pattern formation. Major similarities of the two types of barrier discharges are elaborated.

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Radial structure of a low-frequency atmospheric-pressure glow discharge in helium

Cited by 155 publications

References 10 publications

The influence of impurities on the performance of the dielectric barrier discharge

The influence of impurities on the performance of the dielectric barrier discharge

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Collective phenomena in volume and surface barrier discharges

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