Dispersion properties of low-frequency waves in magnetized dusty plasmas with dust size distribution

Tripathi, Komal; Sharma, Satish K.

doi:10.1063/1.872055

Cited by 30 publications

(12 citation statements)

References 11 publications

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“…Incorporating the effect of charged dust distributions in the description of waves in dusty plasmas has mostly been restricted to linear or weakly nonlinear modes (Tripathi & Sharma 1996;Brattli et al 1997;Meuris et al 1997;de Juli & Schneider 1998;Yaroshenko et al 2001), so we describe large-amplitude, nonlinear solitary waves in space plasmas that contain charged dust distributions, to which end we have to adapt the Sagdeev pseudopotential formalism.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear electrostatic modes in astrophysical plasmas with charged dust distributions

Verheest

Yaroshenko

2009

A&A

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Context. Most theoretical investigations of wave phenomena in dusty plasmas have treated charged dust as additional heavy negative ions in standard multispecies models. Many dusty plasma experiments use monodisperse grains, but charged (and neutral) grains in space environments come in a whole range of sizes and compositions, hence in masses and charges. Dust density distributions having a power-law decay with size are often observed in planetary rings. Aims. There is a need to investigate larger solitary structures, since wave descriptions involving charged dust distributions have usually been limited to linear or weakly nonlinear modes. Methods. Sagdeev pseudopotential methods describe large-amplitude solitary waves in a co-moving reference frame and are adapted to include dust distributions, using mass and charge, or alternatively size, as additional variables. Observed power-law distributions lead to descriptions involving hypergeometric functions. Results. Lower limits for possible solitary wave velocities follow from requiring that the Sagdeev pseudopotentials have a local maximum for the undisturbed conditions, whereas upper limits come from ensuring that dust densities remain real. Nonlinear amplitudes increase with solitary wave velocities and relative electron temperature. Under similar plasma conditions, dust size distributions admit slower solitary wave solutions, with correspondingly smaller amplitudes than given by monodisperse dust models. For typical planetary ring conditions, the difference can be quite appreciable.

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Section: Introductionmentioning

confidence: 99%

Nonlinear electrostatic modes in astrophysical plasmas with charged dust distributions

Verheest

Yaroshenko

2009

A&A

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“…This cut-off is mainly due to the nonlinearity of the set of Eqs. (34)- (43). In order to have a quantitative electrostatic sheath thickness, we can extrapolate the curves by using appropriate mathematical methods.…”

Section: A Electrostatic Sheath Resultsmentioning

confidence: 99%

“…We note that we have assumed that all dust grains have the same surface potential U d . 43,44 This assumption is justified by the fact that the dust grains of same material carry the same electric potential.…”

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 fluctuations of the grain charge are found to be a source of wave damping or growth, which is a salient feature of dusty plasma. [1][2][3][4][5][6][7] The dust has also been noted to influence a three-wave parametric process in unmagnetized plasmas. [8][9][10] In this paper we study the parametric instability of a radio wave below the electron cyclotron frequency ( 0 Շ c ) in a magnetized dusty plasma, taking into account dust charge fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Stimulated scattering of a whistler wave off ion-cyclotron and ion-acoustic modes in a dusty plasma

Annou

Tripathi

1998

Physics of Plasmas

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Dispersion properties of low-frequency waves in magnetized dusty plasmas with dust size distribution

Cited by 30 publications

References 11 publications

Nonlinear electrostatic modes in astrophysical plasmas with charged dust distributions

Nonlinear electrostatic modes in astrophysical plasmas with charged dust distributions

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

Stimulated scattering of a whistler wave off ion-cyclotron and ion-acoustic modes in a dusty plasma

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