Experimental investigation of Lissajous figure shapes in planar and surface dielectric barrier discharges

Biganzoli, I; Barni, R; Gurioli, A; Pertile, R; Riccardi, C.

doi:10.1088/1742-6596/550/1/012039

Cited by 32 publications

(28 citation statements)

References 12 publications

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“…Whatever the values of β (and therefore of time), the upper and lower sides remain always parallel (A1D1 // B1C1 // A2D2 // B2C2 // A3D3 // B3C3) with therefore ξOFF5 pF. If the parallelism of the lateral sides BxAx and CxDx is identical for each individual value of β, this is no more the case if these sides belong to different values of β (for example A1B1 is no more parallel to A3B3 the charges which are deposited one after the other after crossing the gap has also been observed by Biganzoli et al [45]. In our experimental conditions, the voltage is not constant during the very short lifetime of the micro-discharge: it decreases from the breakdown potential to a lower value, thus explaining why V is negative and therefore why the segment presents a negative slope.…”

Section: T1 = 1s T2 = 2s T3 = 3smentioning

confidence: 67%

Seed-packed dielectric barrier device for plasma agriculture: Understanding its electrical properties through an equivalent electrical model

Judée

Dufour

2020

Journal of Applied Physics

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Seeds have been packed in a dielectric barrier device where cold atmospheric plasma has been generated to improve their germinative properties. A special attention has been paid on understanding the resulting plasma electrical properties through an equivalent electrical model whose experimental validity has been demonstrated here. In this model, the interelectrode gap is subdivided into 4 types of elementary domains, according to whether they contain electric charges (or not) and according to their type of medium (gas, seed or insulator). The model enables to study the influence of seeds on the plasma electrical properties by measuring and deducing several parameters (charge per filament, gas capacitance, plasma power, …) either in no-bed configuration (i.e. no seed in the reactor) or in packed-bed configuration (seeds in the reactor). In that second case, we have investigated how seeds can influence the plasma electrical parameters considering six specimens of seeds (beans, radishes, corianders, lentils, sunflowers and corns). The influence of molecular oxygen (0-100 sccm) mixed with a continuous flow rate of helium (2 slm) is also investigated, especially through filaments breakdown voltages, charge per filament and plasma power. It is demonstrated that such bed-packing drives to an increase in the gas capacitance (ξOFF), to a decrease in the βparameter and to variations of the filaments' breakdown voltages in a seed-dependent manner. Finally, we show how the equivalent electrical model can be used to assess the total volume of the contact points, the capacitance of the seeds in the packed-bed configuration and we demonstrate that germinative effects can be induced by plasma on four of the six agronomical specimens.

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Section: T1 = 1s T2 = 2s T3 = 3smentioning

confidence: 67%

Seed-packed dielectric barrier device for plasma agriculture: Understanding its electrical properties through an equivalent electrical model

Judée

Dufour

2020

Journal of Applied Physics

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“…An example of noise experienced in Q-V diagrams is shown in Figure 10, as well as Refs. [47,48]. The unfiltered plot in Figure 10 shows background noise during the capacitive phase, but larger spikes during the discharging phase of the DBD cycle.…”

Section: Noisy Q-v Diagramsmentioning

confidence: 98%

Electrical Diagnostics of Dielectric Barrier Discharges

Peeters¹,

Butterworth²

2019

Atmospheric Pressure Plasma - From Diagnostics to Applications

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Atmospheric pressure dielectric barrier discharges (DBD) has many industrial applications and remains a focus of academic research. This chapter provides a thorough overview of electrical diagnostics for DBD, with a specific focus on charge-voltage measurement techniques. These methods are often underutilised in the existing scientific literature, despite the fact that they can provide useful insights into plasma behaviour. Both optimization of the electrical measurement setup and the interpretation of results are treated in-depth. The diagnostic techniques are discussed for a range of applications, from classic planar DBDs, to catalyst packed beds, plasma actuators, as well as techniques for measuring single microdischarges.

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“…In the objective of being reproducible and of calculating the energetic efficiency of our method, the power transferred must be assessed. It was so by the Lissajous method [94][95][96] : a 3.2nF capacitor was placed in series with the reactor, and the voltage drops V r , across the reactor, and V c , across the capacity, were measured with suited voltage probes and displayed as a XY plot. The capacitor gave access to the accumulated charge transferred through the reactor (capacitive current + discharge current).…”

Section: Reactor Assemblymentioning

confidence: 99%

Microfluidic chips for plasma flow chemistry: application to controlled oxidative processes

et al. 2018

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Experimental investigation of Lissajous figure shapes in planar and surface dielectric barrier discharges

Cited by 32 publications

References 12 publications

Seed-packed dielectric barrier device for plasma agriculture: Understanding its electrical properties through an equivalent electrical model

Seed-packed dielectric barrier device for plasma agriculture: Understanding its electrical properties through an equivalent electrical model

Electrical Diagnostics of Dielectric Barrier Discharges

Microfluidic chips for plasma flow chemistry: application to controlled oxidative processes

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