The dynamics of formation of monolayer dust structures in a confining electric field

Ваулина, О. С.; Koss, X. G.; Владимиров, С. В.

doi:10.1088/0031-8949/79/03/035501

“…With the decrease of β , additional layers form in the center of the structure and the single-layered peripheral subsystem decreases in size. This is an expected behavior for a dust system which transforms from a pancake-like structure into a spherical one at β /α = 1 58,59 . In the range β /α = 50 ÷ 300 the central region comprises two or three layers which is the case of interest similar to the experimental system.…”

Section: Multiscale Simulations Of Phase Coexistence In Complex Plasmasmentioning

confidence: 68%

Self-Sustained Non-Equilibrium Co-existence of Fluid and Solid States in a Strongly Coupled Complex Plasma System

Hariprasad¹,

Bandyopadhyay²,

Nikolaev³

et al. 2022

Preprint

0

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A complex (dusty) plasma system is well known as a paradigmatic model for studying the kinetics of solid-liquid phase transitions in inactive condensed matter. At the same time, under certain conditions a complex plasma system can also display characteristics of an active medium with the micron-sized particles converting energy of the ambient environment into motility and thereby becoming active. We present a detailed analysis of the experimental complex plasmas system that shows evidence of a non-equilibrium stationary coexistence between a cold crystalline and a hot fluid state in the structure due to the conversion of plasma energy into the motion energy of microparticles in the central region of the system. The plasma mediated non-reciprocal interaction between the dust particles is the underlying mechanism for the enormous heating of the central subsystem, and it acts as a micro-scale energy source that keeps the central subsystem in the molten state. Accurate multiscale simulations of the system based on combined molecular dynamics and particle-in-cell approaches show that strong structural nonuniformity of the system under the action of electostatic trap makes development of instabilities a local process. We present both experimental tests conducted with a complex plasmas system in a DC glow discharge plasma and a detailed theoretical analysis.

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“…With the decrease of , additional layers form in the center of the structure and the single-layered peripheral subsystem decreases in size. This is an expected behavior for a dust system which transforms from a pancake-like structure into a spherical one at 57 , 58 . In the range the central region comprises two or three layers which is the case of interest similar to the experimental system.…”

Section: Multiscale Simulations Of Phase Coexistence In Complex Plasmasmentioning

confidence: 72%

Self-sustained non-equilibrium co-existence of fluid and solid states in a strongly coupled complex plasma system

Hariprasad

¹

,

Bandyopadhyay

²

,

Nikolaev

³

et al. 2022

Sci Rep

View full text Add to dashboard Cite

A complex (dusty) plasma system is well known as a paradigmatic model for studying the kinetics of solid-liquid phase transitions in inactive condensed matter. At the same time, under certain conditions a complex plasma system can also display characteristics of an active medium with the micron-sized particles converting energy of the ambient environment into motility and thereby becoming active. We present a detailed analysis of the experimental complex plasmas system that shows evidence of a non-equilibrium stationary coexistence between a cold crystalline and a hot fluid state in the structure due to the conversion of plasma energy into the motion energy of microparticles in the central region of the system. The plasma mediated non-reciprocal interaction between the dust particles is the underlying mechanism for the enormous heating of the central subsystem, and it acts as a micro-scale energy source that keeps the central subsystem in the molten state. Accurate multiscale simulations of the system based on combined molecular dynamics and particle-in-cell approaches show that strong structural nonuniformity of the system under the action of electostatic trap makes development of instabilities a local process. We present both experimental tests conducted with a complex plasmas system in a DC glow discharge plasma and a detailed theoretical analysis.

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“…Estimates of the characteristic frequency of the trap ω 1..3 = (eZ α/M) 1/2 , experimentally obtained for the perturbed and equilibrium systems (ω 1 and ω 2 , respectively) as well as analytically calculated (ω 3 ), are shown in table 2. The theoretical estimate ω 3 has been obtained on the basis of approximation for the trap gradient α in the case of an equilibrium cluster of particles interacting via a Yukawa-type screened potential [24]:…”

Section: Experiments and Resultsmentioning

confidence: 99%

Influence of external perturbations on the interaction between grains in plasma

Лисин

¹

,

Timirkhanov

²

,

Ваулина

³

et al. 2013

Self Cite

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An experimental study of dust grain dynamics in plasma was carried out for cluster systems relaxing to their equilibrium state after the action of a laser beam. The influence of this external perturbation on the potential between interacting dust grains was analyzed. We found that the spatial asymptotes of the pair potential for perturbed and equilibrium dust systems differ. The possible reasons for this phenomenon are discussed. 9

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The dynamics of formation of monolayer dust structures in a confining electric field

Cited by 44 publications

References 29 publications

Self-Sustained Non-Equilibrium Co-existence of Fluid and Solid States in a Strongly Coupled Complex Plasma System

Self-Sustained Non-Equilibrium Co-existence of Fluid and Solid States in a Strongly Coupled Complex Plasma System

Self-sustained non-equilibrium co-existence of fluid and solid states in a strongly coupled complex plasma system

Influence of external perturbations on the interaction between grains in plasma

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