Comparative study of diffuse barrier discharges in neon and helium

Navrátil, Zdeněk; Brandenburg, Ronny; Trunec, David; Brablec, Antonı́n; Šťahel, Pavel; Wagner, H. Gg.; Kopecký, Zdeněk

doi:10.1088/0963-0252/15/1/002

Cited by 78 publications

(66 citation statements)

References 21 publications

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“…It was well accepted that neon metastables and excimers have enough energy to ionize impurity nitrogen by Penning effect as shown in equations (5) and (6) [7] . for the breakdown.…”

Section: Breakdown Voltagementioning

confidence: 99%

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A dielectric barrier discharge in neon at atmospheric pressure

Ran¹,

Luo²,

Wang³

2011

J. Phys. D: Appl. Phys.

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Dielectric barrier discharge in neon at atmospheric pressure was investigated with electrical measurement and fast photography. It was found that a stable diffuse discharge can be easily generated in a gap with a gap space of 0.5 ~ 6 mm and is identified with a glow discharge. The first breakdown voltage of the gap is considerably higher than that of the same gap working in a stable diffuse discharge mode, which indicates that Penning ionization of neon metastables from the previous discharge with the inevitable gas impurities plays an important role in the decrease of the breakdown voltage. Discharge patterns were observed in the gap shorter than 1mm. From the experiments with a wedge-like gap, it was found that the discharge patterns are formed in the area with higher applied electric field, which suggested that a higher applied electric field may cause a transition from a diffuse glow to discharge patterns.

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“…It was well accepted that neon metastables and excimers have enough energy to ionize impurity nitrogen by Penning effect as shown in equations (5) and (6) [7] . for the breakdown.…”

Section: Breakdown Voltagementioning

confidence: 99%

“…Extensive work was done and the mechanism of diffuse barrier discharges in helium and nitrogen is now fairly well established [2][3][4][5] . It was reported that diffuse DBD can also be generated in atmospheric neon [6][7][8] , but more detailed investigations on neon DBD are needed.…”

Section: Introductionmentioning

confidence: 99%

A dielectric barrier discharge in neon at atmospheric pressure

Ran¹,

Luo²,

Wang³

2011

J. Phys. D: Appl. Phys.

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“…Dielectric barrier discharges (DBDs) are non‐equilibrium low‐temperature discharges. DBDs are operated in wide range of pressures1, 2 in different gases3–5 and therefore they are attractive for diversified industrial applications. These low‐temperature discharges, when operated at atmospheric pressure, are suitable for the treatment of materials which are sensitive to temperature and pressure, like thermolabile materials and biological substrates 6, 7…”

Section: Introductionmentioning

confidence: 99%

Filamentary and Homogeneous Modes of Dielectric Barrier Discharge (DBD) in Air: Investigation through Plasma Characterization and Simulation of Surface Irradiation

Rajasekaran

Mertmann

Bibinov

et al. 2010

Plasma Processes & Polymers

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The reported dielectric barrier discharge (DBD) source comprises of a ceramic‐covered copper electrode, and plasma can be ignited in ambient air with grounded ‘opposite’ electrodes or with objects of high capacitance (e.g., human body), when breakdown conditions are satisfied. Filamentary plasma mode is observed when the same source is operated using grounded opposite electrodes like aluminium plate and phosphate buffered saline solution, and a homogeneous plasma mode when operated on glass. When the source is applied on human body, both homogeneous and filamentary discharges occur simultaneously which cannot be resolved into two separate discharges. Here, we report the characterization of filamentary and homogeneous modes of DBD plasma source using the above mentioned grounded electrodes, by applying optical emission spectroscopy, microphotography and numerical simulation. Averaged plasma parameters like electron velocity distribution function and electron density are determined. Fluxes of nitric oxide, ozone and photons reaching the treated surface are simulated. These fluxes obtained in different discharge modes namely, single‐filamentary discharge (discharge ignited in same position), stochastical filamentary discharge and homogeneous discharge are compared to identify their applications in human skin treatment. It is concluded that the fluxes of photons and chemically‐active particles in the single filamentary mode are the highest but the treated surface area is very small. For treating larger area, the homogeneous DBD is more effective than stochastical filamentary discharge.

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“…42,43 The presence of uniform plasma characterised by lack of filaments 44 can be observed in Figure 5(b).…”

Section: Resultsmentioning

confidence: 95%

Influence of shock wave propagation on dielectric barrier discharge plasma actuator performance

Erfani¹,

Zare‐Behtash²,

Kontis³

2012

J. Phys. D: Appl. Phys.

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Erfani, R., Zare-Behtash, H., and Kontis, K. (2012 AbstractInterest in plasma actuators as active flow control devices is growing rapidly due to their lack of mechanical parts, light weight, and high response frequency. Although the flow induced by these actuators has received much attention, the effect that the external flow has on the performance of the actuator itself must also be considered, specially the influence of unsteady high-speed flows which are fast becoming a norm in the operating flight envelopes. The primary objective of the current study is to examine the characteristics of a dielectric barrier discharge (DBD) plasma actuator when exposed to an unsteady flow generated by a shock tube. This type of flow, which is often used in different studies, contains a range of flow regimes from sudden pressure and density changes to relatively uniform high-speed flow regions. A small circular shock tube is employed along with the schlieren photography technique to visualise the flow. The voltage and current traces of the plasma actuator are monitored throughout, and using the well established shock tube theory the change in the actuator characteristics are related to the physical processes which occur inside the shock tube. The results show that not only is the shear layer outside of the shock tube affected by the plasma but the passage of the shock front and high-speed flow behind it also greatly influences the properties of the plasma.

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Comparative study of diffuse barrier discharges in neon and helium

Cited by 78 publications

References 21 publications

A dielectric barrier discharge in neon at atmospheric pressure

A dielectric barrier discharge in neon at atmospheric pressure

Filamentary and Homogeneous Modes of Dielectric Barrier Discharge (DBD) in Air: Investigation through Plasma Characterization and Simulation of Surface Irradiation

Influence of shock wave propagation on dielectric barrier discharge plasma actuator performance

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