Alignment and instability of dust crystals in plasmas

Schweigert, V. A.; Schweigert, I. V.; Melzer, A.; Homann, A.; Piel, A.

doi:10.1103/physreve.54.4155

Cited by 267 publications

(196 citation statements)

References 22 publications

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“…A negatively charged bottom particle [40] is attracted by the ion focus while it is repelled by the negatively charged top particle [1,8]. At the same time, the bottom particle continues to repel the top one whence accelerating it [9]. The forces working to produce this motion are the plasma forces [41].…”

Section: Coupled Pairs As Quasi-particlesmentioning

confidence: 99%

“…[8].) On the other hand, they can be successfully used, as the studies performed recently have shown, as an active agent in the plasma crystal heating experiments [9,10], as a convenient practical diagnostic tool allowing to test in the simplest way the complex plasma elasticity modules [11][12][13], or as a probe of the plasma electric field distribution [14].…”

Section: Introductionmentioning

confidence: 99%

“…This terminology is also used in the granular media [15] and colloidal [16] physics. The particles located between the layers in multi-layer crystals [9,17] are naturally called the interlayer particles [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Observation of particle pairing in a two-dimensional plasma crystal

et al. 2014

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The observation is presented of naturally occurring pairing of particles and their cooperative drift in a two-dimensional plasma crystal. A single layer of plastic microspheres was suspended in the plasma sheath of a capacitively coupled rf discharge in argon at a low pressure of 1 Pa. The particle dynamics were studied by combining the top-view and side-view imaging of the suspension. Cross analysis of the particle trajectories allowed us to identify naturally occurring metastable pairs of particles. The lifetime of pairs was long enough for their reliable identification.

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Section: Coupled Pairs As Quasi-particlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observation of particle pairing in a two-dimensional plasma crystal

et al. 2014

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“…According to [4] the vertical electric field in a sheath changes linearly with the height. This dependence is realized approximately in the regions not too close to the lower electrode and the border of the presheath: the quadratic approximation for the potential ϕ(z) in the plasma layer is also used in [5,6] for the analysis of the equations of motion of DC . Therefore in the case of a vertical potential well we use in eq.…”

Section: Equations Of Static Equilibriummentioning

confidence: 99%

“…Then the necessary inequality is ℓ < 6R D which is usually satisfied (see, for example, [3,5,6]). The linear terms in Eq.…”

Section: Equations Of Static Equilibriummentioning

confidence: 99%

Nonhomogeneity of dusty crystals and plasma diagnostics

1999

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Kinetic modelling of dusty plasmas

Matyash

Schneider

2004

Contrib. Plasma Phys.

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Modelling of ECR-heated methane plasmas was done using a particle-in-cell code with collisions (PIC MCC) to get a better understanding in the problem of carbon layer production and chemical sputtering in such plasmas, which serve as a model system of divertor plasmas being dominated by carbon sputtering, especially at detached conditions. A fully kinetic model (PIC MCC, resolving also the sheath in front of the wall) including all relevant species and their reactions (neutrals, ions, electrons) was developed and applied. The same model was used to study capacitive RF discharges which are also used to create so-called plasma crystals. Depending on neutral gas pressure different plasma conditions appear (determined by the importance of collisions with neutrals). For low neutral densities rather dynamic plasma profiles and distribution function emerge (stochastic Fermi heating), whereas for high densities quasi-stationary conditions show up. These are then used for the study of plasma crystals, where the dust particles are introduced as additional species in the model.The creation mechanism of these quasi-ordered systems are discussed (force balance between gravitational force and electrostatic electric field force in the sheath) with special emphasis of the ion-dust interaction (ion drag force) establishing also dust molecules through focussing of ion flows in the sheath regions of such discharges.

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Alignment and instability of dust crystals in plasmas

Cited by 267 publications

References 22 publications

Observation of particle pairing in a two-dimensional plasma crystal

Observation of particle pairing in a two-dimensional plasma crystal

Nonhomogeneity of dusty crystals and plasma diagnostics

Kinetic modelling of dusty plasmas

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