Experimental and theoretical investigations of plasma multiple double layers and their evolution to chaos

Dimitriu, Dan Gheorghe; Aflori, Magdalena; Ivan, L. M.; Radu, V; Poll, Eyck-Michael; Agop, M.

doi:10.1088/0963-0252/22/3/035007

Cited by 21 publications

(8 citation statements)

References 47 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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“…Complex space-charge structures in the form of sheaths, double layers, fireballs, multiple double layers, multiple fireballs, inverted fireballs or plasma bubbles are well-known phenomena appearing in regions of plasma where local constraints are applied, often in the form of a localized electric field, pulling the system away from thermodynamic equilibrium [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The dynamics of such structures give rise to different plasma instabilities, involving complex oscillations of the plasma parameters or chaotic states under certain experimental conditions [6,[9][10][11][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of the nonlinear dynamics of a complex space-charge configuration inside and around a grid cathode with hole

et al. 2016

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By negatively biasing a metallic grid with a small hole, down to a critical value of the applied potential a complex space-charge structure appears inside and around the grid cathode. The static current–voltage characteristic of the discharge shows one or two current jumps (the number of current jumps depending on the working gas pressure), one of them being of hysteretic type. Electrical probe measurements show a positive potential inside the grid cathode with respect to the potential applied on it. This is interpreted as being due to the hollow cathode effect. Thus, the inner fireball appears around the virtual anode inside the grid cathode. For more negative potentials, the electrons inside the cathode reach sufficient energy to penetrate the inner sheath near the cathode, passing through the hole and giving rise to a second fireball-like structure located outside the cathode. This second structure interacts with the negative glow of the discharge. The recorded time series of the discharge current oscillations reveal strongly nonlinear dynamics of the complex space-charge structure: by changing the negative potential applied on the grid cathode, the structure passes through different dynamic states involving chaos, quasi-periodicity, intermittency and period-doubling bifurcations, appearing like a competition of different routes to chaos.

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“…The ion sheaths are widely investigated because of its primary role in processing plasmas [4,5,6]. However, electron sheaths has been in focus for two decades [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]. In laboratory plasmas, electron sheath is a thin region near the anode where the electron density increases monotonically from plasma to the anode surface [5].…”

Section: Introductionmentioning

confidence: 99%

Doubly forced anharmonic oscillator model for floating potential fluctuations in DC glow discharge plasma

Jayaprakash

Alex²,

Arumugam³

et al. 2021

Physics Letters A

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Experimental and theoretical investigations of plasma multiple double layers and their evolution to chaos

Cited by 21 publications

References 47 publications

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

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

Experimental investigations of the nonlinear dynamics of a complex space-charge configuration inside and around a grid cathode with hole

Doubly forced anharmonic oscillator model for floating potential fluctuations in DC glow discharge plasma

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