Plasma screens enhanced as disorder strikes

Oct 11, 2012
Plasma screens enhanced as disorder strikes

A new study improves our understanding of plasma sources, a state of matter similar to gas in which a certain portion of the particles are ionised and which are used for example in plasma display panels. These results revealed by physicists from the University of Greifswald, Germany, Robert Wild and Lars Stollenwerk, and are about to be published in the European Physical Journal D.

Under certain circumstances, plasma tends to form structures such as filaments of akin to mini-lightning. The authors specifically investigated a so-called barrier discharge, which features at least one electrical insulating material within the discharge gap that acts as an electrically insulating barrier and can be used as a plasma source.

They investigated the transition from a highly ordered filament pattern, which is arranged hexagonally, to a disordered system due to the reduction of the externally applied voltage.

To analyse the transition in the order of the discharge, Wild and Stollenwerk used two approaches. First, they used a method commonly employed to analyse spatial patterns, called 2D Fourier transformation. Then, for the first time, they applied an analysis tool typically used to evaluate dusty plasma discharges, known as triple correlation function. The latter approach offers the advantage of considering only the positions of the nearest neighbouring filaments and of disregarding their actual geometry. As a consequence, it is used to estimate the probability of finding a second filament at a certain angle and distance from a first filament.

The authors observed a pivot point in the voltage at which the decaying order started occurring. This information can ultimately be used to guarantee the quality of applications such as plasma screens. That is because the dissolution of self-organised electric in matter enhances the homogeneity of the matter.

Explore further: Hydrodynamics approaches to granular matter

More information: R. Wild, L. Stollenwerk (2012), Breakdown of order in a self-organised barrier discharge, European Physical Journal D; DOI 10.1140/epjd/e2012-30220-4

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1 / 5 (6) Oct 11, 2012
"They investigated the transition from a highly ordered filament pattern, which is arranged hexagonally,"

This hexagonal phenomenon is the same phenomenon that happens at Saturn's poles, where a hexagonal phenomenon can be found. What this insinuates is that an electric current is flowing into the plasma at Saturn's poles.

4 / 5 (4) Oct 11, 2012
does anyone else cringe when they see an article related to plasma and realize that 9/10 times it will have been twisted by catedrive85 to support his electric univese/plasma cosmology fanatical worldview??
3 / 5 (2) Oct 12, 2012
JSD- I only cringe when the article has nothing to do with plasma physics or EM phenomena and CD85 tries to apply them anyways, but I'll state for the record that plasma physics and EM fields are as important to the workings of the universe as gravity and general relativity. If we ever develope the tech to map inter stellar magnetic field lines, alot of people will be revising models to account for what we see.

I know I'm "camping with the cranks" on this one, but it's better than standing there with my fingers in my ears going LALALALALALA like a climate change denialist. General relativity needs dark matter/dark energy to explain the phenomena that it can't by itself. Plasma cosmology only needs general relativity to do what it does best, then there are no holes left to fill as the observed events fit the theory.

I'll take my "1" now Barakn
3.7 / 5 (3) Oct 13, 2012
i will agree, plasma is very important to astrophysics and such, i doubt you will find a scientists will say otherwise. when they clutch at straws with the plasma cosmology and say things like the grand canyon was made by an electrical discharge do you really consider that plausible? it makes you have to really look at their statements up close and then their anti-science conspiracy theory beliefs are so apparent its hard to take them seriously. also, plasma cosmology has lots of holes that dont have a fill. how about the cmbr? do any current plasma cosmologies explain it to a level that fits our current knowledge of it? i'll answer

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