On the interaction between two fireballs in low-temperature plasma

Dimitriu, Dan Gheorghe; Irimiciuc, Ștefan Andrei; Popescu, Ştefan; Agop, M.; Ioniţă, C.; Schrittwieser, R.

doi:10.1063/1.4936106

Cited by 23 publications

(27 citation statements)

References 34 publications

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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: 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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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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“…This strange behavior has been previously reported for positively biased electrodes immersed in Ar plasma under similar pressures (> 2 Pa). It represents, according to the report of Dimitriu et al 45 that a self-organized structure called plasma reball appeared on the surface of the electrode. The oscillations are induced by the disruption of the double layer formed around the reball and the ionic core being expelled in the plasma.…”

Section: Resultsmentioning

confidence: 92%

The Curious Case of Transient Plasma Generated by ns-laser Ablation of Ag in Ar Gas

Irimiciuc¹,

Chertopalov²,

Bulı́ř³

et al. 2020

Preprint

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The continuous effort for transitioning pulsed laser deposition technique from an experimental tool into an industrial one is sustained by the use of complex technologies for in situ real-time monitoring of the deposition process. Floating Langmuir Probe (LP) and optical emission spectroscopy (OES) measurements were used for plasma monitoring during the pulsed laser deposition of Ag films under various Ar pressure conditions. The electrical measurements revealed a complex multi-structured distribution of the ions, which was strongly influenced by the increase of Ar pressure. The generation of highly energetic ions with the addition of Ar and the degree of Ar gas ionization was also explored. OES measurements confirmed the presence of highly ionized Ar species in the plasma. A peculiar effect was seen under pressures higher than 10 Pa, where the presence of high electronic charges lead to a perturbative behavior of plasma in the vicinity of the LP. The effect of these complex dynamics on the structure and quality of the deposited thin film was also investigated revealing a strong correlation between the electronic distribution in plasma and thin film thickness profile.

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“…Based on the properties of the studied system, there are some associations with real physical phenomena that can be made. The self-structuring process is a well-known aspect of lowtemperature plasmas [18,19]. In recent years there have been some reports on structuring of the laser-produced plasmas [19][20][21], with impacts in pulsed laser deposition technology.…”

Section: Complex System Dynamics Via Harmonic Mappingmentioning

confidence: 99%

Assessment of Complex System Dynamics via Harmonic Mapping in a Multifractal Paradigm

et al. 2021

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In the present paper, nonlinear behaviors of complex system dynamics from a multifractal perspective of motion are analyzed. In the framework of scale relativity theory, by analyzing the dynamics of complex system entities based on continuous but non-differentiable curves (multifractal curves), both the Schrödinger and Madelung scenarios on the holographic implementations of dynamics are functional and complementary. In the Madelung scenario, the holographic implementation of dynamics (i.e., free of any external or internal constraints) has some important consequences explicated by means of various operational procedures. The selected procedures involve synchronous modes through SL (2R) transformation group based on a hidden symmetry, coherence domains through Riemann manifold embedded with a Poincaré metric based on a parallel transport of direction (in a Levi Civita sense). Other procedures used here relate to the stationary-non-stationary dynamics transition through harmonic mapping from the usual space to the hyperbolic one manifested as cellular and channel type self-structuring. Finally, the Madelung scenario on the holographic implementations of dynamics are discussed with respect to laser-produced plasma dynamics.

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On the interaction between two fireballs in low-temperature plasma

Cited by 23 publications

References 34 publications

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

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

The Curious Case of Transient Plasma Generated by ns-laser Ablation of Ag in Ar Gas

Assessment of Complex System Dynamics via Harmonic Mapping in a Multifractal Paradigm

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