Suppression of a spontaneous dust density wave by modulation of ion streaming

Deka, T.; Chutia, Bidyut; Bailung, Yoshiko; Sharma, S. K.; Bailung, Heremba

doi:10.1088/2058-6272/ab5b18

Cited by 5 publications

References 46 publications

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A forced Korteweg–de Vries model for nonlinear mixing of oscillations in a dusty plasma

et al. 2020

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Nonlinear mixing of oscillations in a dusty plasma due to the harmonic time varying modulation of a nonlinear compressional oscillation is analyzed using a simple mathematical model consisting of a forced Korteweg–de Vries equation. An exact analytical solution of this equation is found to exhibit nonlinear mixing in the system. The model solution can be usefully employed to predict the existence of nonlinear mixing of oscillations in a two-dimensional dusty plasma system of a particular experimental configuration.

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A forced Korteweg–de Vries model for nonlinear mixing of oscillations in a dusty plasma

et al. 2020

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Spatiotemporal evolution of a self-excited dust density wave in a nanodusty plasma under strong Havnes effect

et al. 2021

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A broad-spectrum self-excited dust density wave is experimentally studied in a vertically extended nanodusty plasma consisting of in situ grown carbonaceous nanometer sized particles. The nanodusty plasma having high particle density (of the order of 1012–1013 m−3) is created with vertical extension up to (40±0.1) cm and radial extension up to (5±0.1) cm. The propagation of the self-excited dust density wave under strong Havnes effect is examined over a large axial distance (19±0.1) cm. Time-resolved Hilbert transformation and Fast Fourier transformation techniques are used to study the spatiotemporal evolution of frequency and wavenumbers along three directions from the dust void, viz., axial, radial, and oblique. The propagation is found to be inhomogeneous throughout the dust cloud. The phase velocity of the wave is estimated to be quite low and decreasing along the direction of propagation. This effect is attributed to the strong reduction of particle charge due to a high Havnes parameter along the propagation direction. By the estimation of average particle charge, ion density, and the finite electric field throughout the nanodust cloud, a quantitative analysis of the void formation in nanodusty plasma is presented. New insights are also made regarding wave merging phenomena using time-resolved Hilbert transformation.

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Phase switching phenomenon in a system of three coupled DC glow discharge plasmas

Chaubey

Shaw

Mukherjee

et al. 2023

Chaos: An Interdisciplinary Journal of Nonlinear Science

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We report the first experimental observations of phase switching in a system of three coupled plasma sources. Two of the plasma sources are inductively coupled to each other while the third one is directly coupled to one of them. The coupled system acquires a frequency pulling synchronized state following which a transition occurs to a frequency entrainment state with an increase in the frequency of the directly coupled system. We also observe a sudden jump from a lower to a higher frequency entrainment state and a concomitant phase switching between the oscillations of the two directly coupled sources while the phase difference between the inductively coupled sources remains constant. These experimental findings are established using various diagnostic tools, such as the Fourier spectra, frequency bifurcation plots, Lissajous plots, and Hilbert transforms of the data. The experimental results are qualitatively modeled using three coupled van der Pol equations, in which two of them are environmentally coupled while the third one is directly coupled with one of them.

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Suppression of a spontaneous dust density wave by modulation of ion streaming

Cited by 5 publications

References 46 publications

A forced Korteweg–de Vries model for nonlinear mixing of oscillations in a dusty plasma

A forced Korteweg–de Vries model for nonlinear mixing of oscillations in a dusty plasma

Spatiotemporal evolution of a self-excited dust density wave in a nanodusty plasma under strong Havnes effect

Phase switching phenomenon in a system of three coupled DC glow discharge plasmas

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