Formation of layered structures of particles with anisotropic pair interaction

Lisina, I. I.; Ваулина, О. С.

doi:10.1209/0295-5075/103/55002

Cited by 44 publications

(20 citation statements)

References 25 publications

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“…7 a). According to popular wake-field models, such as the point-wake model 14 , 16 , 17 , 21 , 40 and the Kompaneets model 54 , for the case where there is an ion drift weakly disturbed by the upstream microparticle, the derivatives and may not be equal (due to violation of the interaction symmetry) while still positive. However, with an increase in the intensity (amplitude) of the wake field, the derivative may change sign due to the strong effective attraction of the lower negatively charged microparticle to the positive volume charge of the ionic trace (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Experimental study of the nonreciprocal effective interactions between microparticles in an anisotropic plasma

Лисин

Петров

Sametov

et al. 2020

Sci Rep

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There is a variety of cases in nature when the action–reaction symmetry is broken. In particular, suitable conditions for this are realized in colloidal suspensions and complex plasmas. Since the first theories and simulations of the nonreciprocal effective interactions between microparticles in complex plasmas were published in 1995–1996, there have been hundreds of studies in the theoretical development of this theme. However, despite such a rich theoretical background, one of the important unsolved problems is a direct experimental determination of the nonreciprocal interparticle interaction forces. Here, we studied experimentally in detail the forces of the nonreciprocal effective interaction between microparticles suspended a radio-frequency produced plasma sheath. For this purpose, an experimental method based on an analysis of the spectral density of random processes in an open dissipative two-particle system was developed. In contrast to previous investigations, the proposed method takes into account random and dissipative processes in the system, does not require a special design of the experimental setup and any external perturbations, pre-measurements of external fields and any assumptions about the type of interaction. We found that even small charge changes of one particle, caused by its thermal motion in a wake field of another particle, can lead to a significant change in the effective (measurable) interaction between the particles.

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Section: Resultsmentioning

confidence: 99%

Experimental study of the nonreciprocal effective interactions between microparticles in an anisotropic plasma

Лисин

Петров

Sametov

et al. 2020

Sci Rep

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show abstract

“…Similar simple model has previously been used in the construction of an anisotropic distribution of the interaction forces between dust particles in plasmas, since it reflects in an adequate way the generation of a restoring force acting on the downstream particle. 16,41,42 In our model, the forceF kj acting on a particle with number j and charge Q j in the electric field created by the FIG. 1.…”

Section: Numerical Simulationmentioning

confidence: 99%

Solution of the inverse Langevin problem for open dissipative systems with anisotropic interparticle interaction

et al. 2015

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Solution of the inverse Langevin problem is presented for open dissipative systems with anisotropic interparticle interaction. Possibility of applying this solution for experimental determining the anisotropic interaction forces between dust particles in complex plasmas with ion flow is considered. For this purpose, we have tested the method on the results of numerical simulation of chain structures of particles with quasidipole-dipole interaction, similar to the one occurring due to effects of ion focusing in gas discharges. Influence of charge spatial inhomogeneity and fluctuations on the results of recovery is also discussed. V C 2015 AIP Publishing LLC.

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“…Moreover, under certain external conditions the free flight paths of the buffer plasma particles may turn less in magnitude than the Debye shielding length and, thus, an increasingly important role is played by interparticle collisions that result in ion trapping in the vicinity of dust particles [32] or even requires an application of hydrodynamics to correctly treat the plasma shielding effect [33]. It has to be admitted that real dust grains are hardly spherical in shape which leads to non-zero dipole moments of dust particles and, as a consequence, to anisotropic interactions between them [34]. The intergrain interaction potential can yet be determined experimentally with the aid of some theoretical arguments which, for example, was done in [35] for the rf discharge dusty plasma in the framework of the Langevin dynamics.…”

Section: Wwwcpp-journalorgmentioning

confidence: 99%

Polarization and Finite Size Effects in Correlation Functions of Dusty Plasmas

Davletov

Yerimbetova

Mukhametkarimov

et al. 2015

Contrib. Plasma Phys.

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An approach is presented to derive a pseudopotential model of interaction between dust particles that simultaneously takes into account the polarization, finite size and screening effects. The consideration starts from the assumption that the dust particles are hard balls made of a conductive material such that their mutual interaction and interaction with the electrons and ions of the buffer plasma can analytically be interpreted within the method of image charges. Then, the renormalization theory of plasma particles interaction, leading to the so-called generalized Poisson-Boltzmann equation, is applied to obtain the interaction potential of two isolated dust grains immersed into the buffer plasma of electrons and ions. After that the Ornstein-Zernike relation in the hyper-netted chain approximation (HNC) is numerically solved to study the radial distribution function and the static structure factor of the dust grains. In doing so the system of hard balls is actually replaced by a system of point-like charges with properly adjusted number density in the form of van der Waals correction. A straightforward comparison is made with the Monte-Carlo simulation to find a fairly good agreement for the radial distribution function at relatively high dust couplings.

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Formation of layered structures of particles with anisotropic pair interaction

Cited by 44 publications

References 25 publications

Experimental study of the nonreciprocal effective interactions between microparticles in an anisotropic plasma

Experimental study of the nonreciprocal effective interactions between microparticles in an anisotropic plasma

Solution of the inverse Langevin problem for open dissipative systems with anisotropic interparticle interaction

Polarization and Finite Size Effects in Correlation Functions of Dusty Plasmas

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