Diagnostic Methods in Dusty Plasmas

Melzer, A.

doi:10.1007/978-3-030-20260-6_10

Cited by 2 publications

(1 citation statement)

References 53 publications

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“…Dust formations occur in many laboratory devices such as in material processing industries and thermonuclear fusion devices [1][2][3][4][5][6][7]. Dusty plasma is produced in the laboratory either by introducing the dust particles externally or by growing particles in the plasma using a mixture of noble gases with reactive gases such as SiH 4 , C 2 H 2 , CH 4 , etc [8][9][10]. In the laboratory discharge plasma, dust grain floats with negative potential to maintain equilibrium between ion and electron fluxes onto the dust so that the surface current is zero.…”

Section: Introductionmentioning

confidence: 99%

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

Deka

Chutia

Bailung

et al. 2020

Plasma Sci. Technol.

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Synchronization of a self-excited dust density wave has been experimentally investigated in a strongly coupled dusty plasma. A dust density wave of frequency ∼78 Hz is spontaneously generated from the dust void boundary due to the ion streaming instability. The electric field in the dust void region is measured, and the electric field force and ion drag force on the dust particles at the void boundary are estimated to explain the mechanism of spontaneous dust density wave excitation. Synchronization occurring through the suppression mechanism is observed by modulating the ion streaming by applying an external sinusoidal signal to the dust void. At sufficiently high modulation amplitude, the onset of period-doubling bifurcation is observed. Fast Fourier transform spectral analysis is done using time-series data obtained from high-speed video imaging. The van der Pol equation with a force term is used to correlate the observed suppression phenomena.

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Section: Introductionmentioning

confidence: 99%

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

Deka

Chutia

Bailung

et al. 2020

Plasma Sci. Technol.

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Multi-diagnostic of dust growth in a capacitive Ar/C₂H₂ plasma

Peláez,

Jiménez-Redondo,

Maté

et al. 2024

Plasma Sources Sci. Technol.

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The interest in the production of nanoparticles (NPs) within Ar/C2H2 reactive plasmas is increasing, driven by their potential applications in functional materials or for their analogy to cosmic dust. The growth process of NPs has been thoroughly examined using a broad array of diagnostic tools. Significant among these tools are those that determine two-dimensional distributions of NP sizes and densities. The inherent complexity of these techniques has resulted in a limited number of works that integrate these measurements with a multitude of other diagnostic tools. Here, we show a multi-diagnostic exploration of the growing process of NPs in Ar/C2H2 plasmas. The combination of in-situ techniques, such as scattered light images, optical emission spectroscopy, light extinction, quadrupole mass signals, or self-bias voltage, with exsitu SEM images and FTIR spectra of the deposited dust, provides a detailed picture of the growth process. The temporal evolution of plasma parameters, coupled with chemical composition measurements, provides a comprehensive description of the dust growth phases, and the FTIR measurements reveal an appreciable difference in chemical composition between the core and shell of the NPs. Furthermore, employing a method based on the terminal fallingvelocity of NPs in the afterglow, the intrinsic mass density of NPs is estimated. The asymmetries observed in the spatial distributions of nanoparticle size and density are qualitatively discussed in terms of neutral drag, ion drag, and electrostatic forces.

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Diagnostic Methods in Dusty Plasmas

Cited by 2 publications

References 53 publications

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

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

Multi-diagnostic of dust growth in a capacitive Ar/C₂H₂ plasma

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Diagnostic Methods in Dusty Plasmas

Cited by 2 publications

References 53 publications

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

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

Multi-diagnostic of dust growth in a capacitive Ar/C2H2 plasma

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Multi-diagnostic of dust growth in a capacitive Ar/C₂H₂ plasma