Synergetic aspects of gas-discharge: lateral patterns in dc systems with a high ohmic barrier

Purwins, H.‐G.; Stollenwerk, L.

doi:10.1088/0741-3335/56/12/123001

Cited by 41 publications

(37 citation statements)

References 182 publications

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“…Thus, the hexagonal crystal is actually a transient structure composed of the hexagonal sublattice and the honeycomb sublattice, which emerge with the sequence of H 1 -H 2 -H 1 -H 2 in each cycle of the applied voltage. This is a result of the nonlinear effect, since some of the eigenmodes of the system are spontaneously selected, giving rise to spatiotemporally stable plasma structures [42,43]. The good periodic repeatability facilitates the synchronization between the plasma lattice structures and the input microwave sources in practical applications, even if the microwave sources have durations as short as a few nanoseconds [35,41].…”

Section: Formation Of Plasma Lattice Structuresmentioning

confidence: 99%

Spatiotemporally Controllable Plasma Lattice Structures in Dielectric Barrier Discharge

et al. 2019

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A method to generate spatiotemporally controllable plasma lattice structures via dielectric barrier discharge is proposed by utilizing a latticed water electrode. A variety of plasma lattice structures including triangle, hexagon, honeycomb, and complex superlattices are obtained by changing three parameters including the applied voltage, the gas pressure, and the gas compositions. Moreover, these plasma lattices can be quickly reconstructed, allowing for active control both in space and time. Two-dimensional particle-in-cell simulations are carried out to demonstrate the formation of plasma structures under different voltages, which are in good agreement with experimental observations. Our method provides a unique way for the fabrication of controllable plasma lattice structures, which may enable tunable control of microwave radiation for wide applications.

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Section: Formation Of Plasma Lattice Structuresmentioning

confidence: 99%

Spatiotemporally Controllable Plasma Lattice Structures in Dielectric Barrier Discharge

et al. 2019

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“…It is natural to expect that this may indeed be the case if sign(α) = sign(β) in (1.2). However, note that from the modeling point of view, i.e., with the background of (1.2) as model for gas-discharge dynamics in mind, both α and β must be positive [50,55,58].…”

mentioning

confidence: 99%

A Geometric Approach to Stationary Defect Solutions in One Space Dimension

Doelman¹,

Heijster²,

Xie³

2016

SIAM J. Appl. Dyn. Syst.

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Abstract. In this manuscript, we consider the impact of a small jump-type spatial heterogeneity on the existence of stationary localized patterns in a system of partial differential equations in one spatial dimension, i.e., defined on R. This problem corresponds to analyzing a discontinuous and non-under the assumption that the unperturbed system, i.e., the ε → 0 limit system, possesses a heteroclinic orbit Γ that connects two hyperbolic equilibrium points (plus several additional nondegeneracy conditions). The unperturbed orbit Γ represents a localized structure in the PDE setting. We define the (pinned) defect solution Γε as a heteroclinic solution to the perturbed system such that limε→0 Γε = Γ (as graphs). We distinguish between three types of defect solutions: trivial, local, and global defect solutions. The main goal of this manuscript is to develop a comprehensive and asymptotically explicit theory of the existence of local defect solutions. We find that both the dimension of the problem as well as the nature of the linearized system near the endpoints of the heteroclinic orbit Γ have a remarkably rich impact on the existence of these local defect solutions. We first introduce the various concepts in the setting of planar systems (n = 2) and-for reasons of transparency of presentation-consider the three-dimensional problem in full detail. Then, we generalize our results to the n-dimensional problem, with special interest for the additional phenomena introduced by having n ≥ 4. We complement the general approach by working out two explicit examples in full detail: (i) the existence of pinned local defect kink solutions in a heterogeneous Fisher-Kolmogorov equation (n = 4) and (ii) the existence of pinned local defect front and pulse solutions in a heterogeneous generalized FitzHugh-Nagumo system (n = 6).

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“…where ε 0 is the vacuum dielectric constant, ϕ is the potential, and ρ v is the space charge density [33].…”

Section: Partial Discharge Numerical Simulation Modelmentioning

confidence: 99%

Partial Discharge Simulation of Air Gap Defects in Oil-Paper Insulation Paperboard of Converter Transformer under Different Ratios of AC–DC Combined Voltage

et al. 2021

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A converter transformer is important primary equipment in a DC transmission project. The voltage on the valve side winding is complex when the equipment is running, including DC, AC, and AC–DC combined voltage. The insulation structure of the valve side winding of a converter transformer is an oil-paper insulation structure, which may have a variety of defects in the manufacturing stage and daily use, resulting in partial discharge. Therefore, it is the key to studying the partial discharge characteristics and mechanism of oil-paper insulation under AC–DC combined voltage. In this paper, we build a two-dimensional air gap model of oil-paper-insulated pressboard considering the actual particles and actual reaction based on the fluid model. The characteristics and evolution mechanism of partial discharge (PD) in pressboard under different AC/DC combined voltages are studied by numerical simulation. The results show that when the DC component increases, the polarity effect of partial discharge is more obvious, while the potential and discharge intensity in the air gap decrease. Further analysis revealed that the DC component in the combined voltage accumulated a large number of surface charges on the surface of the air gap, and the space charge distribution was more uniform and dispersed, which generated an electric field with opposite polarity to the DC component in the air gap and, then, inhibited the development of local discharge in the paperboard. The results of the simulation are consistent with the previous experimental phenomena, and the mechanism analysis of the simulation results also verifies the previous analysis on the mechanism of experimental phenomena. This will lay a theoretical foundation for the further study of partial discharge phenomenon of oil-paper insulation structures in practical operation in the future.

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Synergetic aspects of gas-discharge: lateral patterns in dc systems with a high ohmic barrier

Cited by 41 publications

References 182 publications

Spatiotemporally Controllable Plasma Lattice Structures in Dielectric Barrier Discharge

Spatiotemporally Controllable Plasma Lattice Structures in Dielectric Barrier Discharge

A Geometric Approach to Stationary Defect Solutions in One Space Dimension

Partial Discharge Simulation of Air Gap Defects in Oil-Paper Insulation Paperboard of Converter Transformer under Different Ratios of AC–DC Combined Voltage

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