Strongly coupled fine particle clouds in fine particle (dusty) plasmas

Totsuji, Hiroo

doi:10.1002/ctpp.201700088

Cited by 3 publications

(7 citation statements)

References 26 publications

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“…Set of parameters we consider is a typical one in experiments [6,7,[14][15][16][17][18]: the partially ionized plasma of inert gases such as Ar and Ne at 10-10 2 Pa with the plasma (electron and ion) and fine particle densities around 10 8 -10 9 cm −3 and 10 4 -10 5 cm −3 , respectively, and the electron temperature of a few eV. A preliminary result in limited cases has been reported in [19].…”

Section: Introductionmentioning

confidence: 99%

Static behavior of fine particle clouds in fine particle (dusty) plasmas under gravity

Totsuji

2018

J. Phys. Commun.

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Static behavior of fine particle cloud in fine particle (dusty) plasmas under gravity is analyzed numerically on the basis of the drift-diffusion equations. The system is assumed to have onedimensional structure and the effect of the ion drag force is taken into account. The results confirm the analytically obtained prediction that we have an enhanced charge neutrality in fine particle clouds under gravity as well as under microgravity. They are also compared with a simple model based on the enhanced charge neutrality in clouds to show its applicability.

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Section: Introductionmentioning

confidence: 99%

Static behavior of fine particle clouds in fine particle (dusty) plasmas under gravity

Totsuji

2018

J. Phys. Commun.

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“…Here we assume the one-dimensional structures: the assumption is applicable to the case under gravity at least at the central part of the distributions. Examples of solutions are shown in Figure 2 [20,21]. We also observe the large enhancement of the charge neutrality as in the case of microgravity.…”

Section: Gravitymentioning

confidence: 55%

“…In clouds of particles, we have largely enhanced charge neutrality as in Figures 1 and 2, shown by numerical solutions of the drift-diffusion equations and analytically [18,20,21,24]. This observation enables us to construct simple models of particle clouds in plasmas.…”

Section: Enhancement Of Charge Neutrality In Fine Particle Clouds: Apmentioning

confidence: 67%

“…The behavior of average densities can be analyzed on the basis of the drift-diffusion equations [16,17]. Here we derive average densities of electrons, ions, and particles and determine the one-body potential for particles [18][19][20][21] which enables microscopic simulations of fine particle distribution.…”

Section: Description By Drift-diffusion Equationsmentioning

confidence: 99%

“…In the case under gravity, we have the same equations, but the effect of gravity is to be taken into account for the force on particles [20,21]. The distributions do not have symmetries even in cylindrical discharges.…”

Section: Gravitymentioning

confidence: 99%

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Basic Properties of Fine Particle (Dusty) Plasmas

Totsuji¹

2020

Progress in Fine Particle Plasmas

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Beginning with typical values of physical parameters, basic properties of the system of fine particles (dusts) in plasmas are summarized from the viewpoint of statistical physics. Mutual interactions and one-body shadow potential for fine particles are derived, and, by analytic treatments and numerical solutions of driftdiffusion equations, it is shown that one of their most important characteristics is the large enhancement of the charge neutrality in fine particle clouds. This observation leads to simple models for the structures of fine particle clouds under both microgravity and usual gravity. Due to large magnitudes of their charges and relatively low temperatures, fine particles are often in the state of strong coupling, and some interesting phenomena possibly expected in their system are discussed with concrete examples. Also reviewed is the shell model, a useful framework to obtain microscopic structures in strongly coupled Coulomb and Coulomb-like systems with specific geometry.

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Phase diagram of strongly coupled fine particle (dusty) plasmas with limited Spacial extents: Theory and simulation

Totsuji

2023

Contrib. Plasma Phys

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Phase separations in strongly coupled fine particle (dusty, complex) plasmas are discussed and phase diagrams are expressed in the ‐‐plane or in terms of strengths of the Coulomb coupling between fine particles and the screening by the ambient electron‐ion plasma. Two possibilities, separations into phases with different electrons, ion, and fine particle densities and ones into phases with a common electron density, are analyzed and it is shown that, when the spacial extent is limited as in usual experiments, only the latter is realized. Based on a model of fine particle plasma as a Yukawa system with non‐uniformity taken into account, molecular dynamics simulations are performed with constant electron density. Fine particles are moved as particles while position‐dependent local averages of ion and fine particle distributions are treated as continuum. Though the critical point is located at a smaller coupling by about a factor of two compared with the theoretical prediction, the results of simulations confirm the existence of such phase separations with a common electron density.

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Strongly coupled fine particle clouds in fine particle (dusty) plasmas

Cited by 3 publications

References 26 publications

Static behavior of fine particle clouds in fine particle (dusty) plasmas under gravity

Static behavior of fine particle clouds in fine particle (dusty) plasmas under gravity

Basic Properties of Fine Particle (Dusty) Plasmas

Phase diagram of strongly coupled fine particle (dusty) plasmas with limited Spacial extents: Theory and simulation

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