Dusty plasmas

Фортов, В. Е.; Khrapak, Aleksei G.; Khrapak, S. A.; Molotkov, V. I.; Петров, О. Ф.

doi:10.3367/ufnr.0174.200405b.0495

Cited by 193 publications

(74 citation statements)

References 254 publications

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“…The forces between the (nodal) nth and n ± 1 particles, F n,n±1 , are determined by equation (1). Introducing the particle displacements in the horizontal and vertical directions of the nodal nth particle {x n , z n } and similarly for the vertically aligned neighbour grains {x n±1 , z n±1 }, the interparticle distances can be written as Q± = ( + δz n±1 ) 2 + δx 2 n±1 .…”

Section: Dispersion Relationsmentioning

confidence: 99%

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The ‘dipole instability’ in complex plasmas and its role in plasma crystal melting

2006

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The 'dipole instability' in complex plasmas and its role in plasma crystal melting Using the dipole model for binary dust-dust interactions, the instability of wave perturbations in a one-dimensional particle string oriented along the ion flow (it highlights the major aspect of the multi-layer crystals) is considered. Longitudinal short wavelength perturbations are found to exist below a certain threshold value of gas pressure. They may act as a possible precursor of the melting transition observed in multi-layer plasma crystals. For different discharge conditions, the threshold of this 'dipole instability' is found to be in the range 10-150 Pa.

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Section: Dispersion Relationsmentioning

confidence: 99%

“…[1]- [4]). In ground-based experiments, these strongly coupled formations are observed in the sheath of the lower electrode, where the upward-directed electrostatic force balances the gravitational force on microparticles [5]- [9].…”

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confidence: 99%

The ‘dipole instability’ in complex plasmas and its role in plasma crystal melting

2006

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“…In this case, the distribution of potential and charge around a macroparticle is defined by the Poisson-Boltzmann equation (PBE). This problem is of interest from the standpoint of physics of colloidal systems in electrolytes [1][2][3][4] and physics of plasma with condensed dispersed phase (dust plasma) [5][6][7]. In dust plasma, equilibrium conditions may arise in the case of a temperature T ~ 2×10 3 K and not too high an electron work function from the surface of dust particles (thermionic plasma).…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Potential of Charged Macroparticles in Plasma under Conditions of Thermal Equilibrium

D’yachkov

2005

High Temp

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An exact analytical solution of the Poisson-Boltzmann equation (PBE) is found in the case of spherical, axial, or plane geometry, which describes the potential distribution around a charged macroparticle (wire or plane) in plasma under conditions of thermal equilibrium with an arbitrary relationship between the charge densities of macroparticles and plasma. The solution is obtained as a logarithm of the power series in several different forms. A recurrent relation is found for coefficients of the power series. The exact solution of the PBE for the case of plane geometry is already known; its identity to that found in this study is shown in a particular case. In the case of not too high charges of macroparticles, the exact solution is approximated by the solution of linearized PBE; for a solitary particle, this solution corresponds to the DLVO and Debye-H ckel approximations. For high charges, the exact solution deviates from an approximate one (very appreciably too) only in the vicinity of the macroparticle. An approximate solution is used to renormalize the macroparticle charge and to construct a simple model of electrostatic interaction of like-charged particles, which demonstrates the possibility of their attraction. The equilibrium distance of attracting particles (the position of minimum of interaction energy) agrees well with the position of maximum of the experimentally obtained pair correlation function for dust particles in thermal plasma.

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“…is correct, where g r is the Larmor radius of electron, d λ is the Debye length, a is the MP radius, in a collisionless plasma, for describing of the ion and electron currents on the MP Orbital-Motion-Limited (OML) theory is used [8]. In this paper we consider plasma with the magnetized electrons which temperature T e is in the range 10-100eV, ion temperature T i is 1eV, plasma density n 0 is (1) is correct and we can use the OML theory.…”

Section: Charging Of the Mpmentioning

confidence: 99%

Phase States of Macroparticles in Plasma With Hot Electrons at Presence of Ion Beam

Bizyukov¹,

Chibisov²,

Kutenko³

2017

EEJP

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The evaporation possibility of micro sized metallic particles during them passage through the region of a magnetized plasma with a Maxwellian velocity distribution with the electron temperature in the range T e =1...100eV at presence of an ion beam with the energy in the range ε b =1...6keV is studied theoretically. The floating potential of a macroparticle is obtained using the OML theory, the effect of the electron temperature and the energy of the ion beam on its magnitude is studied. The equation of energy balance on the macroparticle surface is obtained, such energy exchange mechanisms as collisions of particles of an ion beam and plasma particles with the macroparticle, thermal radiation of the macroparticle, as well as cooling due to the evaporation of substance from the macroparticle surface are taken into account. The effect of the temperature of plasma electrons and the ion beam energy on the stationary temperature of the macroparticle is studied. It is shown that for the given plasma and ion beam parameters, the temperature of the copper macroparticle is below the boiling point so that the evaporation of the macroparticle occurs at temperatures below the boiling point. The dependences of the macroparticle evaporation time on the electron temperature and the energy of the ion beam have been obtained. KEYWORDS: macroparticles, dusty plasma, ion beam, evaporation, electric potential ФАЗОВЫЕ СОСТОЯНИЯ МАКРОЧАСТИЦ В ПЛАЗМЕ С ГОРЯЧИМИ ЭЛЕКТРОНАМИ В ПРИСУТСТВИИ ИОННОГО ПУЧКА А.А. Бизюков, А.Д. Чибисов, А.И. Кутенко Харьковский национальный университет имени В.Н. Каразина61022, г. Харьков, пл. Свободы, 4 Теоретически изучается возможность испарения металлических макрочастиц микронных размеров при прохождении через область замагниченной плазмы с электронами, имеющими Максвелловское распределение по скоростям с температурой в диапазоне T e =1…100 эВ, и в присутствии ионного пучка с энергией в диапазоне ε b =1…6 кэВ. В приближении OML теории вычисляется плавающий потенциал макрочастицы, изучается влияние температуры электронов а также энергии ионного пучка на его величину. Получено уравнение баланса энергий на поверхности макрочастицы, при этом принимаются во внимание такие механизмы обмена энергией, как столкновение частиц ионного пучка и частиц плазмы с макрочастицей, тепловое излучение макрочастицы, а также охлаждение за счет испарения вещества с поверхности макрочастицы. Изучается влияние температуры плазменных электронов и энергии ионного пучка на стационарную температуру макрочастицы. Показано, что при заданных параметрах плазмы и ионного пучка такая равновесная температура медной макрочастицы находится ниже точки кипения, так что испарение макрочастицы происходит при температурах ниже температуры кипения. Получены зависимости времени испарения медных макрочастиц от температуры электронов и энергии ионного пучка. КЛЮЧЕВЫЕ СЛОВА: макрочастицы, пылевая плазма, ионный пучок, испарение, электрический потенциал ФАЗОВІ СТАНИ МАКРОЧАСТОК В ПЛАЗМІ З ГАРЯЧИМ ЕЛЕКТРОНАМИ В ПРИСУТНОСТІ ІОННОГО ПУЧКА О.А. Бізюков, О.Д...

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Dusty plasmas

Cited by 193 publications

References 254 publications

The ‘dipole instability’ in complex plasmas and its role in plasma crystal melting

The ‘dipole instability’ in complex plasmas and its role in plasma crystal melting

Electrostatic Potential of Charged Macroparticles in Plasma under Conditions of Thermal Equilibrium

Phase States of Macroparticles in Plasma With Hot Electrons at Presence of Ion Beam

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