A comprehensive model of ozone generation in dielectric barrier discharges is presented. The combines the physical processes micro-discharges with chemistry formation. It based on an extensive reaction scheme including major electronic and ionic processes. importance excited atomic molecular states demonstrated. Theoretical limits are given for production efficiency attainable concentration. most important parameters influencing performance ozonisers identified. All theoretical predictions...

The nature of the silent discharge (dielectric barrier discharge) is reviewed. Theoretical models for describing its physics and ensuing plasma chemistry are presented. phenomena leading to gas breakdown in such electrode configurations at about atmospheric pressure discussed. current transport takes place within a large numer short-lived microdischarges, conditions which investigated. theoretical predictions compared measurements. Two entirely different applications discharges treated:...

A review is presented of plasma chemical processes occurring in the volume part electrical nonequilibrium discharges. The role energetic electrons as initiators reactions a cold background gas discussed. Different discharge types (glow, corona, silent, RF, and microwave discharges) are investigated with respect to their suitability for processing. Emphasis placed on requirements initiating maintaining and, at same time, optimizing parameters desired process. Using large-scale industrial...

Dusty plasmas are ubiquitous in low-temperature laboratory discharges as well the near-earth environment, planetary rings, and interstellar spaces. In this paper, updated knowledge of fundamentals collective dust-plasma interactions several novel phenomena presented that have been observed laboratories space dusty plasmas. Mechanisms responsible for charging dust grains discussed, fact charge perturbation is a new dynamical variable plasma. The underlying physics different forces act on...

The current understanding of some important nonlinear collective processes in quantum plasmas with degenerate electrons is presented. After reviewing the basic properties plasmas, model equations (e.g., hydrodynamic and effective Schr\"odinger-Poisson equations) are presented that describe phenomena at nanoscales. effects electron degeneracy arise due to Heisenberg's uncertainty principle Pauli's exclusion for overlapping wave functions result tunneling pressure. Since Fermions (spin-$1/2$...

Abstract

Dense quantum plasmas are ubiquitous in planetary interiors and compact astrophysical objects, semiconductors micro-mechanical systems, as well the next generation intense laser-solid density plasma interaction experiments x-ray free-electron lasers. In contrast to classical plasmas, one encounters extremely high number low temperature plasmas. The latter composed of electrons, positrons holes, which degenerate. Positrons (holes) have same (slightly different) mass but opposite charge....

It is shown that the electrostatic surface plasma rogue waves can be excited and propagate along a plasma-vacuum interface due to nonlinear coupling between high-frequency plasmons low-frequency ion oscillations. The pulse propagation condition its behavior are discussed. structures may useful for controlling maximizing plasmonic energy surface.

We present simulation studies of the formation and dynamics dark solitons vortices in quantum electron plasmas. The latter is governed by a pair equations comprising nonlinear Schr\"odinger Poisson system equations, which conserves number electrons as well their momentum energy. governing one spatial dimension admit stationary solutions form envelope soliton. reveals its robustness. Furthermore, we numerically demonstrate existence cylindrically symmetric two-dimensional vortices, survive...

Abstract Industrial ozone generation uses a special high pressure, low temperature electrical discharge which is referred to as the dielectric barrier or silent discharge. The filamentary structure of this and properties individual microdischarges are discussed. main reaction paths for excited atomic molecular species in oxygen air identified. Possible approaches obtain power densities, generating efficiencies concentrations

We report new attractive force between ions that are shielded by degenerate electrons in quantum plasmas. Specifically, we show the electric potential around an isolated ion has a hard core negative part resembles Lennard-Jones (LJ)-type potential. Physically, is attributed to consideration of statistical pressure, Bohm potential, as well electron exchange and correlations due electron-1/2 spin within framework hydrodynamical description The shape determined ratio Bohr radius Wigner-Seitz...

We consider nonlinear interactions between intense circularly polarized electromagnetic (CPEM) waves and electron plasma oscillations (EPOs) in a dense quantum plasma, taking into account the density response presence of relativistic ponderomotive force mass increase CPEM wave fields. The dynamics EPOs is governed by two coupled Schrödinger equations Poisson's equation. admit modulational instability an pump against EPOs, leading to formation trapping localized pipes hole that associated...

We consider the modulational instability of nonlinearly interacting two-dimensional waves in deep water, which are described by a pair coupled nonlinear Schrödinger equations. derive dispersion relation. The latter is numerically analyzed to obtain regions and associated growth rates instability. Furthermore, we follow long term evolution means computer simulations governing equations demonstrate formation localized coherent wave envelopes. Our results should be useful for understanding...

The use of dielectric-barrier discharges (DBDs) is a mature technology originally developed for industrial ozone production. In this article, it demonstrated that DBDs are also an effective tool to convert the greenhouse gases CH4 and CO2 synthesis gas (syngas, H2/CO) at low temperature ambient pressure. produced in system can have arbitrary H2/CO ratio, mainly depending on mixing ratio CH4/CO2 feed gas. Specific electric energy, pressure, hardly influence syngas composition. amount strongly...

Abstract

Starting from the governing equations for a quantum magnetoplasma including Bohm potential and electron spin- 12 effects, we show that system of magnetohydrodynamic (QMHD) admits rarefactive solitons due to balance between nonlinearities diffraction tunneling effects. It is found effect introduces pressurelike term with negative sign in QMHD equations, which modifies shape solitary magnetosonic waves makes them wider shallower. Numerical simulations time-dependent shows development are...

Ozone yield is a good indicator of atomic oxygen formation in gas discharges. Through exact measurement the ozone formed silent discharge per unit energy it possible to determine rate coefficient for electron impact dissociation molecular and efficiency process. The agreement measurements with calculations within 30%.

A model for nonlinear ion waves in an unmagnetized plasma with relativistically degenerate electrons and cold fluid ions is presented here. The inertia given here by the mass while restoring force provided relativistic electron degeneracy pressure, dispersion due to deviation from charge neutrality. Korteweg–de Vries equation derived small but finite amplitude used study properties of localized acoustic solitons parameters relevant dense astrophysical objects such as white dwarf stars....