Effect of growing nanoparticle on the magnetic field induced filaments in a radio-frequency Ar/C<sub>2</sub>H<sub>2</sub> discharge plasma

Jaiswal, Surabhi; Menati, Mohamad; Couëdel, Lénaïc; Holloman, V. H.; Rangari, Vijay K.; Thomas, E.

doi:10.35848/1347-4065/ab78eb

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…Both phenomena highly depend on the magnetic field and neutral gas pressure, mostly appear in plasmas/dusty plasmas that are exposed to strong magnetic fields (B 1 T), and they both are controlled by the ion dynamics [45,51]. Also, these two phenomena can occur simultaneously in the plasma and if the dust particles number density is not too high, the presence of the dust particles does not significantly affect the filamentation [52].…”

Section: Introductionmentioning

confidence: 99%

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Menati

Hall

Rasoolian

et al. 2020

Plasma Sources Sci. Technol.

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In this paper, the formation of imposed patterns due to placing a wide wire mesh ('waffle' electrode) in the bulk of a strongly magnetized (B 1 T) plasma is investigated both experimentally and numerically. A new double head electrostatic probe was designed for the experiments that allows for measurements of the floating potential beneath the mesh in the magnetized plasma. The measurements using this probe revealed that due to the presence of the 'waffle' electrode in the bulk of the magnetized plasma, an organized pattern appears in the plasma potential. As a result of this imposed pattern, when dust particles were added to the experiments, they became trapped beneath the edges of the 'waffle' electrode. The effects of placing a wire mesh in the bulk of a magnetized plasma were further investigated using fluid and particle-in-cell (PIC) simulations. These simulations were able to qualitatively reproduce the experimental observations. The results of the simulations showed that the imposed patterns arise due to differences in the cross-field transport of the electrons and ions in the presence of magnetic field.

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Section: Introductionmentioning

confidence: 99%

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Menati

Hall

Rasoolian

et al. 2020

Plasma Sources Sci. Technol.

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“…One of the main observations is that under strong magnetic fields the gas discharges (with and without dust) undergo an instability where a filamentation of the plasma occurs, see e.g. (Schwabe et al 2011;Thomas et al 2016;Jaiswal et al 2020 and Fig. 1a).…”

Section: Filamentationmentioning

confidence: 99%

Physics of magnetized dusty plasmas

Melzer¹,

Krüger²,

Maier³

et al. 2021

Rev. Mod. Plasma Phys.

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In this review, we summarize recent advances in the field of dusty plasmas at strong magnetic fields. Special emphasis is put on situations where experimental laboratory observations are available. These generally comprise dusty plasmas with magnetized electrons and ions, but unmagnetized dust. The fundamental parameters characterizing a magnetized (dusty) plasma are given and various effects in dusty plasmas under magnetic fields are presented. As examples, the reaction of the dust component to magnetic-field modified plasma properties, such as filamentation, imposed structures, dust rotation, nanodusty plasmas and the resulting forces on the dust are discussed. Further, the behavior of the dust charge is described and shown to be relatively unaffected by magnetic fields. Wake field formation in magnetized discharges is illustrated: the strength of the wake field is found to be reduced with increased magnetic field. The propagation of dust acoustic waves in magnetized dusty plasmas is experimentally measured and analyzed indicating that the wave dynamics are not heavily influenced by the magnetic field. Only at the highest fields ($$B> 1$$ B > 1 T) the wave activity is found to be reduced. Moreover, it is discussed how dust-cyclotron waves might be used to indicate a magnetized dust component. Finally, implications of a magnetized dusty plasma are illustrated.

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“…Dusty plasmas, that is, plasmas that contain a large number of macroscopic particles, are a research topic of basic plasma physics [1,2] as well as technological applications. [3] The research field of dusty plasmas is centered around the description of plasmas that contain comparatively massive particles in addition to neutral and charged gaseous species and electrons.…”

Section: Introductionmentioning

confidence: 99%

“…Dusty plasmas, that is, plasmas that contain a large number of macroscopic particles, are a research topic of basic plasma physics [ 1,2 ] as well as technological applications. [ 3 ]…”

Section: Introductionmentioning

confidence: 99%

Analyzing dust particle size and size distribution on extracted particles by SEM and comparing with light scattering techniques

Petersen,

Wötzel,

Zamponi

et al. 2024

Plasma Processes & Polymers

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This study investigates the measurement of plasma‐grown nanoparticles, comparing ex situ scanning electron microscopy (SEM) and an in situ light scattering method which is based on Mie theory and utilizes a neural network for evaluation. The research reveals that the particle size distribution (PSD) is normal and very narrow, supporting the common assumption of monodisperse particle clouds. Importantly, the study finds that the spread of the PSD increases proportionally with the mean size, suggesting varied growth rates based on the radius of the spherical dust grains. Both methods produce consistent results, which encourages the use of the interference‐free, real‐time, light‐based Mie method in similar studies.

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Effect of growing nanoparticle on the magnetic field induced filaments in a radio-frequency Ar/C₂H₂ discharge plasma

Cited by 8 publications

References 30 publications

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Physics of magnetized dusty plasmas

Analyzing dust particle size and size distribution on extracted particles by SEM and comparing with light scattering techniques

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Effect of growing nanoparticle on the magnetic field induced filaments in a radio-frequency Ar/C2H2 discharge plasma

Cited by 8 publications

References 30 publications

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Experimental observation and numerical investigation of imposed pattern formation in magnetized plasmas by a wide wire mesh

Physics of magnetized dusty plasmas

Analyzing dust particle size and size distribution on extracted particles by SEM and comparing with light scattering techniques

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Effect of growing nanoparticle on the magnetic field induced filaments in a radio-frequency Ar/C₂H₂ discharge plasma