Type I intermittency related to the spatiotemporal dynamics of double layers and ion-acoustic instabilities in plasma

Abstract

Anodic double layer instabilities occur in low-temperature diffusion filament-type discharge plasma by applying a certain positive bias with respect to the plasma potential to an additional electrode. Periodic nonlinear regimes, characterized by proper dynamics of double layers, are sustained if excitation and ionization rates in front of the electrode reach the value for which current limitation effects appear in the static current-voltage characteristic. It was experimentally shown that under specific experimental conditions these ordered spatiotemporal phenomena can evolve into chaotic states by type I intermittency. This transition was verified by the evolution of time series, fast Fourier transform amplitude plots, three–dimensional reconstructed state spaces, power laws, and flickering phenomena spectrum, as well as by the return map and tangent bifurcation.

Analysis of the intermittent behavior in a low-temperature discharge plasma by recurrence plot quantification

“…At the transition voltage where the ion-acoustic instability takes over, sudden change in both frequency and amplitude is observed. 14 Since the amplitude of the ion-acoustic oscilla- …”

“…The best fitting curve gives H = 1.545 and V C = 15.5 V. This critical value of the voltage is remarkably close to the ionization potential of the working gas ͑argon͒ V ion = 15.6 V. The result is in very good agreement with the accepted situation that instability is caused by the charge structures of double layer type, generated in the neighborhood of the additional electrode. 14,19 For values of the voltage in excess of the ionization potential, the structure becomes unstable and different types of dynamics can be initiated in the discharge plasma. Although the LAM value expected for a periodic time series is 1, our computed result is only 0.965.…”

“…The mechanism of type 1 intermittency in a discharge plasma is related to the dynamics of a double layer and an ion-acoustic-like instability driven by it. 14,15 …”

Solid components separation from heterogeneous mixtures through turbulence control

“…Plasma is a very favourable medium for the development of instabilities and transitions to chaos, a large variety of scenarios of transition to chaos being experimentally observed: intermittencies [64,65], quasi-periodicity (Ruelle-Takens scenario) [66,67], period doubling (Feigenbaum scenario) [68,69], cascade of sub-harmonic bifurcations [70,71], or torus breakdown [72]. It can be described as a fluid governed by a combination of Maxwell's equations and Navier-Stokes equations.…”

Spectral investigations of two simultaneous fireballs in plasma

“…At higher values of the applied voltage, two situations were experimentally recorded. In the first case, the fireball passes into a dynamic state, consisting of periodic disruptions and re-aggregations of the double layer, giving rise to oscillations of the current collected by the electrode [4][5][6]. In the second case, a more complex structure develops in front of the electrode, consisting of several concentric luminous shells (like an onion), known as multiple double layer [7][8][9].…”