Equilibrium plasma corona surfaces

  • 12 Pages
  • 4.67 MB
  • English
Dept. of Energy, Lawrence Livermore Laboratory, for sale by the National Technical Information Service] , [Livermore, Calif.], [Springfield, Va
Harmonic func
StatementDonald L. Ensley
SeriesUCID ; 18228
ContributionsUnited States. Dept. of Energy, Lawrence Livermore Laboratory
The Physical Object
Pagination12 leaves :
ID Numbers
Open LibraryOL14884791M

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Title: Equilibrium plasma corona surfaces: Authors: Ensley, D. Affiliation: AA(Lawrence Livermore National Lab., CA.) Publication: Unknown: Publication Date.

2 1 An Introduction to Nonequilibrium Plasmas at Atmospheric Pressure pulsed power source for ozone generation in streamer corona reactors [1], or dual frequency RF-generated plasmas [2].

Description Equilibrium plasma corona surfaces PDF

To elaborate the physical understanding further, Mark Kushner has proposed a. A nonthermal plasma, cold plasma or non-equilibrium plasma is a plasma which is not in thermodynamic equilibrium, because the electron temperature is much hotter than the temperature of heavy species (ions and neutrals).As only electrons are thermalized, their Maxwell-Boltzmann velocity distribution is very different than the ion velocity distribution.

Plasma is a good tool for surface modification of polymeric surfaces. When organic materials are exposed to plasma, many chemical reactions are initiated on polymeric surfaces by the plasma, and the polymeric surfaces are modified. These chemical reactions are plasma polymerization, plasma treatment, and plasma graft copolymerization.

Thermodynamic Equilibrium (TE) If a plasma is located in a closed system, each process is in equilibrium with its reverse process (detailed balance) and the plasma is in thermodynamic equilibrium.

Such a plasma can be characterized with a few parameters: The (typically very high) temperature, pressure, and number densities of each single species. The corona discharge along the field lines and that field lines ending outside 0 65° usually originate on the point surface outside the ionization region.

The Warburg distribution is sketched in Fig. In point-to-plane unipolar current coronas, as well as in wire-cylinder or wire-plane ones, space. Aspects of Thermodynamic Equilibrium in Plasma 99 radiation, can describe the state of plasma.

In other words, there is equilibrium in a weak radiation field, where T from the Maxwell distribution is equal to the temperature T from Saha ionization equation. This is the so-called plasma in local thermodynamic equilibrium (LTE). The plasma discharge is virtually potential free so it can be used to treat conductive materials.

Plasma also produces no ozone gas which is a natural byproduct of the corona process. Alternatively, corona discharge typically imparts less surface energy but can treat very large areas.

Charging of Polymeric Surfaces by Positive Impulse Corona Article in IEEE Transactions on Dielectrics and Electrical Insulation 16(3) - July with 17 Reads How we measure 'reads'. Plasma activation (or plasma functionalization) is a method of surface modification employing plasma processing, which improves surface adhesion properties of many materials including metals, glass, ceramics, a broad range of polymers and textiles and even natural materials such as wood and seeds.

Plasma functionalization also refers to the introduction of functional groups on the surface of. Plasma cleaning of surfaces is well established. plasma cleaning can be found in the book by Strong. DBD sources generate non-equilibrium plasma.

Two types of DC-driven atmospheric air discharges, including a streamer corona and a transient spark with short high current pulses of limited energy, were employed for bio-decontamination of water and various surfaces (agar plates, plastic foils, human teeth) contaminated by bacteria or spores (Salmonella typhimurium, Bacillus cereus).

Both discharges generate cold non-equilibrium by: 1. Title: Aero-propulsion Applications of Non-equilibrium Plasma.

ABSTRACT Nonequilibrium plasma/non-thermal plasma/cold plasmas are being used in a wide range of new applications in aeronautics, active flow control, heat transfer reduction, plasma-assisted ignition and combustion, noise suppression, and power Size: 2MB.

Intended for use by scientists and engineers active in various fields of low-temperature plasma physics, this book is also suitable for teachers and students at pre- and postgraduate level. In chapter 1 general problems of the elementary physics of plasma are considered and the principal ideas relating to plasma properties are by: The corona discharge is another type of strongly non-equilibrium, yet weakly ionized plasma that can be found in nature during electrical storms near sharp edges, points, or thin wires (i.e., near regions of high electric field strength).

A corona discharge can be created with a strong, continuous DC electric field and often requires only one. #9 – Introduce Atmospheric Plasma Technology at Film Extrusion and/or Conversion. Atmospheric plasma can introduce functional groups which can.

Key Takeaway. increase surface tension and extend treatment longevity. Introduce oxygen to increase film surface oxidation. Cross-linking reaction (electron bombardment x of corona). Non-Equilibrium Air Plasmas at Atmospheric Pressure reviews recent advances and applications in the generation and maintenance of atmospheric-pressure plasmas.

With contributions from leading international researchers, the coverage includes advances in atmospheric-pressure plasma source development, diagnostics and characterization, air plasma Format: Hardcover. Non-equilibrium plasma in liquid water: dynamics of generation and quenching.

Andrey Starikovskiy 1, Yong Yang 2, Young I Cho 2 and Alexander Fridman 2.

Details Equilibrium plasma corona surfaces FB2

Published 1 April • IOP Publishing Ltd Plasma Sources Science and Technology, Vol Number 2. The self‐consistent classical plasma equilibrium with diffusion is studied in a toroidal geometry having a sheared magnetic field. Near each rational surface it is found that the pressure gradient is zero unless the Fourier component of 1/B2, which resonates with that surface, vanishes.

Despite the resonances, the overall plasma confinement is, in practice, only slightly modified by the Cited by: Corona surface treatment and plasma surface treatment equipment is used to “prime” a surface prior to the printing, coating, or painting process.

Used to treat plastic, glass, rubber, silicone, PTFE, and other materials, these devices temporarily modify the substrate’s surface energy, making it more receptive to inks, paints, and coatings.

This type of plasma is called non-equilibrium plasma or low-temperature plasma. Ionization due to collision Ionization. Electrons discharged from the electrode due to corona discharge are accelerated in the electrical field and collide with electrons and molecules in the atmosphere, resulting in their excitation, dissociation or ionization.

Flame and corona treatment. As outlined earlier, the plasma processing of polymers generally involves technological plasmas, operating in the non-thermal regime. One type of thermal plasma that is routinely used to tailor polymer surfaces is a flame plasma Cited by: 5.

@article{osti_, title = {Toroidal plasma equilibrium with gravity}, author = {Yoshikawa, S}, abstractNote = {A toroidal magnetic field configuration in a gravitational field is calculated both from a simple force-balance and by using magnetic surfaces.

The configuration is found to be positionally stable in a star. The vibrational frequency near the equilibrium point is proportional to. Suslainment and Production of Equilibrium Plasma by Fields in Various Frequency Ranges.- Introduction. Energy Balance in Plasma.- Arc Column in a Constant Field.- Inductively Coupled Radio-Frequency Discharge.- Discharge in Microwave Fields.- Continuous Optical Discharges.- Plasmatrons: Generators of Dense Low.

Uniqueness of the equilibrium of an electron plasma on magnetic surfaces Phys. Plas (); / Current density and plasma displacement near perturbed rational surfaces Phys. Plas (); / Thermal equilibrium of pure electron plasmas across a central region of magnetic surfaces.

The difference between corona and plasma surface treatments Modern technology has improved bonding strength and several other key properties of adhesives.

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However, as good as any adhesive is, it will only perform to expectations if the substrates are sufficiently prepared before glue is dispensed. Plasma treatment or "modified atmospheric plasma" treating is very similar to traditional corona treatments with the exception that gases are injected into the corona discharge to modify the reaction with the substrate.

Some materials are less reactive to a traditional corona and require this special atmospheric plasma treatment. Generally, plastics have chemically inert and nonporous surfaces with low surface tensions. This makes them nonreceptive to bonding with inks, adhesives, coatings, and other substrates.

Corona treaters, Plasma treaters and Flame treaters improve the adhesion of plastics. Polyethylene and polypropylene for example have very low surface energy. Capillarity phenomena are all about us; anyone who has seen a drop of dew on a plant leaf or the spray from a waterfall has observed them.

Apart from their frequently remarked poetic qualities, phenomena of this sort are so familiar as to escape special notice. The VMEC1 non-axisymmetric MHD equilibrium code can compute free-boundary equilibria2. Since VMEC assumes that magnetic fields within the plasma form closed and nested flux surfaces, the plasma-vacuum interface is a flux surface, and the total magnetic field there has no normal component.

VMEC imposes this condition of zero.Openair-Plasma ® activation ensures especially efficient surface modification of plastic, metal, textiles, glass, recycled and composite materials.

Surface energy is targeted by the plasma activation and achieved selectively, exactly where it is needed. The result is .The characteristic plasma response takes place when the otherwise neutral gas turns out to be an electrically conductive medium and this transition can take place for ionization degrees as low as 10 − we shall see, these conditions are met in physical systems as diverse as plasmas in space and astrophysical environments, the Earth ionosphere, laboratory electric discharges or controlled.