Forces and Trapping of Dust Particles

Melzer, A.

doi:10.1007/978-3-030-20260-6_3

Cited by 2 publications

(4 citation statements)

References 49 publications

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“…In order to understand the origin of the spontaneous oscillations, it is necessary to enumerate the forces acting on a particle in the vertical direction [42][43][44]. First, gravity acts on the particle with force F g = −m p g, where m p is the mass of the particle and g is the acceleration due to gravity.…”

Section: A Forces On a Dust Particlementioning

confidence: 99%

“…The ion drag force may be relevant for our experiments since it contains a nonmonotonic dependence on the relative dust-ion velocity, and potentially, spontaneous oscillations of dust particles through "negative damping" in the regime where the force decreases with increasing ion velocity [43]. The ion drag force has two components, a collection force, F dir , due to direct collisions, and a Coulomb force, F Coul , from ions scattered from the Debye shield around the particle [44,47,[49][50][51][52]. In the simple Barnes model of a collisionless plasma [44,51], these forces are…”

Section: A Forces On a Dust Particlementioning

confidence: 99%

“…The ion drag force has two components, a collection force, F dir , due to direct collisions, and a Coulomb force, F Coul , from ions scattered from the Debye shield around the particle [44,47,[49][50][51][52]. In the simple Barnes model of a collisionless plasma [44,51], these forces are…”

Section: A Forces On a Dust Particlementioning

confidence: 99%

“…A more sophisticated model [44,49,52,53] builds on this approach by considering scattering outside the Debye sphere and shifted Maxwellian ion velocity distributions. The result is a decrease in the ion drag force by a factor of ≈2.…”

Section: A Forces On a Dust Particlementioning

confidence: 99%

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Origin of large-amplitude oscillations of dust particles in a plasma sheath

Harper

Gogia

et al. 2020

Phys. Rev. Research

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Micron-size charged particles can be easily levitated in low-density plasma environments. At low pressures, suspended particles have been observed to spontaneously oscillate around an equilibrium position. In systems of many particles, these oscillations can catalyze a variety of nonequilibrium, collective behaviors. Here, we report spontaneous oscillations of single particles that remain stable for minutes with striking regularity in amplitude and frequency. The oscillation amplitude can also exceed 1 cm, nearly an order of magnitude larger than previously observed. Using an integrated experimental and numerical approach, we show how the motion of an individual particle can be used to extract the electrostatic force and equilibrium charge variation in the plasma sheath. Additionally, using a delayed-charging model, we are able to accurately capture the nonlinear dynamics of the particle motion, and estimate the particle's equilibrium charging time in the plasma environment.

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Section: A Forces On a Dust Particlementioning

confidence: 99%

Section: A Forces On a Dust Particlementioning

confidence: 99%

Section: A Forces On a Dust Particlementioning

confidence: 99%

Section: A Forces On a Dust Particlementioning

confidence: 99%

See 2 more Smart Citations

Origin of large-amplitude oscillations of dust particles in a plasma sheath

Harper

Gogia

et al. 2020

Phys. Rev. Research

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Theoretical investigation of wave transmission and reflection in a 1D dusty plasma chain with impurities

Shi,

Wei,

Yang

et al. 2024

Physics of Plasmas

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The present paper investigates how an envelope solitary wave reflected and transmitted by one or several impurities in an inhomogeneous dusty plasma. By using the nonlinear Schrödinger equation and the molecular dynamics method, both the reflected waves and the transmitted waves due to impurities produced by an incident envelope solitary waves are given in the present paper. The results show that both the reflection and the transmission are usually envelope solitary waves if incident wave is an envelope solitary wave. The numbers of both the reflected and transmitted envelope solitary wave and the amplitudes of each reflected and the transmitted envelope waves depend on both the mass ratio of impurity to the dust particle and the impurity numbers in dust particle chain. This result may have potential applications. For example, both the reflection and the transmission produced by a given incident envelope solitary wave have the information of the number and the mass of the impurity.

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Forces and Trapping of Dust Particles

Cited by 2 publications

References 49 publications

Origin of large-amplitude oscillations of dust particles in a plasma sheath

Origin of large-amplitude oscillations of dust particles in a plasma sheath

Theoretical investigation of wave transmission and reflection in a 1D dusty plasma chain with impurities

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