Experimental observation of multiple double Layers structures in Plasma-part I: concentric multiple double Layers

Aflori, Magdalena; Amarandei, George; Ivan, L. M.; Dimitriu, Dan Gheorghe; Sanduloviciu, M.

doi:10.1109/tps.2005.845372

Cited by 14 publications

(7 citation statements)

References 6 publications

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“…As a result, the concentration peak of the activator will split up and shift towards the regions that have a higher concentration of substrate. This scenario explains the formation of several balls of fire on the anode [22,23] as well as their mutual disposition on the anode, in the form of regulate polygons [24]. The stability of eqs.…”

Section: Circuit Theory For a Plasma Diode With A Ball Of Fire Atmentioning

confidence: 97%

Turing structures in dc gas discharges

Popescu

2006

Europhys. Lett.

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Self-organized spatial plasma structures exhibit many similarities with Turing structures obtained in biology and chemistry. Using an analytical mesoscopic approach it is shown that plasma balls of fire belong to the same class of Turing structures like the Brusselator. It is also mathematically proved that the existence of these self-organized plasma structures is related with a negative differential resistance. There are also established the mathematical conditions which the negative differential resistance must satisfy for obtaining a stationary ball of fire at the anode of a plasma diode.

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Section: Circuit Theory For a Plasma Diode With A Ball Of Fire Atmentioning

confidence: 97%

Turing structures in dc gas discharges

Popescu

2006

Europhys. Lett.

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“…When the electron sheath between the fireball and electrode reaches the ionization potential of the neutral gas, a second fireball would be predicted to form by the same mechanism as described in section 6.2. Indeed, such multiple fireball formation has been observed [261,262,263,264,265,266,267,268,269,270,271,272,273]. These usually take the form of concentric spheres or hemispheres, as shown in figure 35 [261,263,264].…”

Section: Multiple Fireballsmentioning

confidence: 98%

“…Indeed, such multiple fireball formation has been observed [261,262,263,264,265,266,267,268,269,270,271,272,273]. These usually take the form of concentric spheres or hemispheres, as shown in figure 35 [261,263,264]. In this case, the radial electrostatic potential profile is staircased with each step consisting of a double layer with potential drop approximately equal to the ionization potential of the neutral gas; for example see figure 36.…”

Section: Multiple Fireballsmentioning

confidence: 99%

Interaction of biased electrodes and plasmas: sheaths, double layers, and fireballs

Baalrud

Scheiner

Yee

et al. 2020

Plasma Sources Sci. Technol.

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Biased electrodes are common components of plasma sources and diagnostics. The plasma-electrode interaction is mediated by an intervening sheath structure that influences properties of the electrons and ions contacting the electrode surface, as well as how the electrode influences properties of the bulk plasma. A rich variety of sheath structures have been observed, including ion sheaths, electron sheaths, double sheaths, double layers, anode glow, and fireballs. These represent complex self-organized responses of the plasma that depend not only on the local influence of the electrode, but also on the global properties of the plasma and the other boundaries that it is in contact with. This review summarizes recent advances in understanding the conditions under which each type of sheath forms, what the basic stability criteria and steady-state properties of each are, and the ways in which each can influence plasma-boundary interactions and bulk plasma properties. These results may be of interest to a number of application areas where biased electrodes are used, including diagnostics, plasma modification of materials, plasma sources, electric propulsion, and the interaction of plasmas with objects in space.

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“…This fireball consists of a core enriched in positive ions and an electrical double layer that surrounds it. In certain experimental conditions (depending mostly on the gas pressure and the electrode biasing voltage), we managed to obtain numerous complex structures in concentric [2] or non-concentric [3] configurations, called multiple double layers (MDLs). The evolution from single to multiple non-concentric double-layer structures is presented in figure 1.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical evidence for the chaotic dynamics of complex structures

et al. 2013

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This paper presents the experimental results on the formation, dynamics and evolution towards chaos of complex space charge structures that emerge in front of a positively biased electrode immersed in a quiescent plasma. In certain experimental conditions, we managed to obtain the so-called multiple double layers (MDLs) with non-concentric configuration. Our experiments show that the interactions between each MDL's constituent entities are held responsible for the complex dynamics and eventually for its transition to chaos through cascades of spatio-temporal sub-harmonic bifurcations. Further, we build a theoretical model based on the fractal approximation (scale relativity theory) in order to reproduce the experimental results (plasma self-structuring and scenario of evolution to chaos). Comparing the experimental results with the theoretical ones, we observe a good correlation between them.

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Experimental observation of multiple double Layers structures in Plasma-part I: concentric multiple double Layers

Cited by 14 publications

References 6 publications

Turing structures in dc gas discharges

Turing structures in dc gas discharges

Interaction of biased electrodes and plasmas: sheaths, double layers, and fireballs

Experimental and theoretical evidence for the chaotic dynamics of complex structures

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