Dynamics of dust particles in plasma sheaths

Resendes, D. P.; Sorasio, G.; Shukła, P. K.

doi:10.1063/1.1488140

Cited by 34 publications

(20 citation statements)

References 37 publications

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“…Here, the possibility of dust levitation in the sheath can be scrutinized. Such dust oscillations are induced by a reduction in the chamber background gas pressure, 10 and also can be attrib- uted to the stochastic nature of dust charging phenomenon. For instance, the effect of the reactor pressure on the motion of a dust particle is demonstrated in Fig.…”

Section: B Dust Particle In Motionmentioning

confidence: 99%

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Dust particle dynamics in magnetized plasma sheath

Davoudabadi

Mashayek

2005

Physics of Plasmas

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In this paper, the structure of a plasma sheath in the presence of an oblique magnetic field is investigated, and dynamics of a dust particle embedded in the sheath is elaborated. To simulate the sheath, a weakly collisional two-fluid model is implemented. For various magnitudes and directions of the magnetic field and chamber pressures, different plasma parameters including the electron and ion densities, ion flow velocity, and electric potential are calculated. A complete set of forces acting on the dust particle originating from the electric field in the sheath, the static magnetic field, gravity, and ion and neutral drags is taken into account. Through the trapping potential energy, the particle stable and unstable equilibria are studied while the particle is stationary inside the sheath. Other features such as the possibility of the dust levitation and trapping in the sheath, and the effect of the Lorentz force on the charged dust particle motion are also examined. An interesting feature is captured for the variation of the particle charge as a function of the magnetic field magnitude.

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Section: B Dust Particle In Motionmentioning

confidence: 99%

“…2-6͒. To simulate the sheath structure we extend an existing well-established model originally developed by Resendes et al 10,11 for modeling the unmagnetized plasma sheath. These models are also being used for simulating the boundary region of strongly magnetized plasmas.…”

Section: Introductionmentioning

confidence: 99%

Dust particle dynamics in magnetized plasma sheath

Davoudabadi

Mashayek

2005

Physics of Plasmas

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“…In the energy range of interest ($eV), it can be considered to be constant. 36,37 Due to their high mobility, the electrons can be considered as an isotherm fluid, therefore,…”

Section: Theoretical Modelmentioning

confidence: 99%

Effect of particles attachment to multi-sized dust grains present in electrostatic sheaths of discharge plasmas

et al. 2014

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The loss of electrons and ions due to their attachment to a Gauss-distributed sizes of dust grains present in electrostatic sheaths of discharge plasmas is investigated. A uni-dimensional, unmagnetized, and stationary multi-fluid model is proposed. Forces acting on the dust grain along with its charge are self-consistently calculated, within the limits of the orbit motion limited model. The dynamic analysis of dust grains shows that the contribution of the neutral drag force in the net force acting on the dust grain is negligible, whereas the contribution of the gravity force is found considerable only for micrometer particles. The dust grains trapping is only possible when the electrostatic force is balanced by the ion drag and the gravity forces. This trapping occurs for a limited radius interval of micrometer dust grains, which is around the most probable dust grain radius. The effect of electron temperature and ion density at the sheath edge is also discussed. It is shown that the attachment of particles reduces considerably the sheath thickness and induces dust grain deceleration. The increase of the lower limit as well as the upper limit of the dust radius reduces also the sheath thickness. V C 2014 AIP Publishing LLC.

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“…The fluctuating quantities ␦n i , ␦v i , as well as ␦E, are small and may be obtained from the perturbed one-dimensional sheath equations: 10,11 …”

Section: ͑13͒mentioning

confidence: 99%

Self-consistent Langevin theory of self-excited oscillations of grains in plasma sheaths

Resendes¹,

Sorasio²,

Shukła

2004

Physics of Plasmas

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Strong kinetic heating of grains is frequently associated with a melting transition in plasma crystals. At high pressures, above 100 mTorr, the melting transition is preceded by a vibrational phase whereas at low pressures, below 50 mTorr, observed large amplitude self-excited oscillations can lead to lattice disruption. At such low background gas pressures, only single layer crystals are formed. This work focuses on the low pressure regime and provides a theory of the self-excited oscillations which explains both the pressure and the power dependence of these oscillations as well as their threshold behavior. The implications for the melting transition are pointed out.

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Dynamics of dust particles in plasma sheaths

Cited by 34 publications

References 37 publications

Dust particle dynamics in magnetized plasma sheath

Dust particle dynamics in magnetized plasma sheath

Effect of particles attachment to multi-sized dust grains present in electrostatic sheaths of discharge plasmas

Self-consistent Langevin theory of self-excited oscillations of grains in plasma sheaths

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