Stepwise expansion of a surface dielectric barrier discharge as a result of alternation in formation of streamers and leaders

Akishev, Yu. S.; Aponin, G. I.; Balakirev, A. A.; Грушин, М. Е.; Petryakov, A. V.; Karalnik, Vladimir; Трушкин, Н. И.

doi:10.1088/0022-3727/46/13/135204

Cited by 32 publications

(40 citation statements)

References 39 publications

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“…Electrical characteristics of the discharge were monitored by a digital oscilloscope Keysight DSOS204A oscilloscope connected to a voltage and current probes. The electrical discharge contains a large number of small current pulses predominantly in positive half-cycle, which is in a good correlation with our previous measurements [12,11] or according to Akishev et al [32] that practically no streamers are visible during the negative polarity. [33] Resonant frequencies and applied voltages ranged from 27 to 29 kHz and 13-17 kV, depending on the side and the mode of treatment.…”

Section: Used Equipmentsupporting

confidence: 92%

Design and evaluation of plasma polymer deposition on hollow objects by electrical plasma generated from the liquid surface

Pavliňák

Galmiz

Zemánek

et al. 2018

Plasma Processes & Polymers

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Recently, plasma deposition at atmospheric pressure has become a promising technology due to its reduced equipment costs and its possibility of in‐line processing. The main aim of this work was to show a process for the deposition of functional layers on hollow objects surface by plasma discharge generated above the liquid electrolyte. In principle, this process is based on the surface dielectric barrier discharge, where the plasma is generated from the boundary line of liquid precursor and dielectric surface. As a model precursor compound a hexamethyldisiloxane was chosen for deposition on external and internal wall surface of polytetrafluoroethylene tube.

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Section: Used Equipmentsupporting

confidence: 92%

Design and evaluation of plasma polymer deposition on hollow objects by electrical plasma generated from the liquid surface

Pavliňák

Galmiz

Zemánek

et al. 2018

Plasma Processes & Polymers

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“…This can be caused by different heating mechanisms of the positive streamer in argon than in air. Possibly, a not fully developed leader initiation could affect the spectra, as the transition to the leader mechanism in atmospheric pressure argon seems to be much faster/easier than for air [40]. In NSD however, the concave tendency of the temperature dependency on spatial coordinate is similar to that one observed in air [43].…”

Section: Rotational Temperature Of N 2 (C)mentioning

confidence: 82%

State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface

Voráč¹,

Synek²,

Procházka³

et al. 2017

J. Phys. D: Appl. Phys.

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Abstract. Optical emission spectroscopy applied to non-equilibrium plasmas in molecular gases can give important information on basic plasma parameters, including the rotational, vibrational temperatures and densities of the investigated radiative states. In order to precisely understand the non-equilibrium of rotational-vibrational state distribution from investigated spectra without limiting presumptions, a state-bystate temperature-independent fitting procedure is the ideal approach. In this paper we present a novel software tool developed for this purpose, freely available for scientific community. The introduced tool offers a convenient way to construct Boltzmann plots even from partially overlapping spectra, in user-friendly environment.We apply the novel software to the challenging case of OH spectra in surface streamer discharges generated from the triple-line of argon/water/dielectrics interface. After the barrier discharge is characterised by ICCD and electrical measurements, the spatially and phase resolved rotational temperatures from N 2 (C-B) and OH(A-X) spectra are measured, analysed and compared. The precise analysis shows that OH(A) states with quantum numbers (v = 0, 9 ≤ N ≤ 13) are overpopulated with respect to the found two-Boltzmann distribution. We hypothesise that fast vibrational-energy transfer is responsible for this phenomenon observed here for the first time. Finally, the vibrational temperature of the plasma and the relative populations of hot and cold OH(A) states are quantified spatially and phase resolved.PACS numbers: 52.30.-q, 52.50. Dg,

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“…As power increases with the reduction of t eff defined filaments start to form. These filaments are also referred to as leaders 13 , 18 in the literature. They are characterized by prominent brightness and elongation, and high temperature compared to the surrounding plasma.…”

Section: Resultsmentioning

confidence: 99%

“…Ozone production corresponding to these frequencies reached a maximum initial rate (plateau) and then dropped below values corresponding to lower frequencies. Thermal filaments are known to form when the applied voltage surpasses a threshold voltage 18 . Increasing frequency reduces this threshold voltage due to the “memory voltage” effect induced by remaining charges on the dielectric barrier.…”

Section: Resultsmentioning

confidence: 99%

Functional relationship between material property, applied frequency and ozone generation for surface dielectric barrier discharges in atmospheric air

Portugal

Roy

Lin

2017

Sci Rep

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We report the experimental characterization of ozone generation in dielectric barrier discharges as a function of the material and characteristics of the dielectric barrier, operating frequency and the power consumed by a surface DBD-plasma reactor in air at atmospheric pressure. To identify the effect of the dielectric barrier, ozone production curves corresponding to ten dielectric barriers with different effective thicknesses and thermal properties are compared and analyzed for two combinations of voltage amplitudes and frequencies: 7 kV/10 kHz and 8.5 kV/14 kHz. The influence of the operating frequency over the ozone generated by a DBD-plasma reactor is studied by varying the frequency in the range 8–20 kHz. The correlation between power measurements and ozone concentrations as well as ozone quenching effects at extreme power conditions are also discussed.

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Stepwise expansion of a surface dielectric barrier discharge as a result of alternation in formation of streamers and leaders

Cited by 32 publications

References 39 publications

Design and evaluation of plasma polymer deposition on hollow objects by electrical plasma generated from the liquid surface

Design and evaluation of plasma polymer deposition on hollow objects by electrical plasma generated from the liquid surface

State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface

Functional relationship between material property, applied frequency and ozone generation for surface dielectric barrier discharges in atmospheric air

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