Rotational kinetics of absorbing dust grains in neutral gas

Ignatov, A. M.; Trigger, S. A.; Maĭorov, S. A.; Ebeling, W.

doi:10.1103/physreve.65.046413

Cited by 12 publications

(7 citation statements)

References 20 publications

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“…5 shows the normalized XANES spectra at the Mn K-edge of sample along with reference compounds MnO2 and MnO. The pre-edge peak A1 was assigned to the direct quadrupole transition from 1s to the empty Mn 3d states [20][21][22][23].…”

Section: Results and Discussion:-mentioning

confidence: 99%

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Rawat¹,

Kumar²,

Kumari³

2016

IJAR

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Self organized SiO 2 nanopillar with MnO tip have been synthesized over Si substrate by annealing the substrate after putting drop of MnCl 2 (in C 2 H 5 OH and H 2 O) over its surface. The controlled growth of nanopillars has been achieved by annealing as sampled Si substrate at 940 o C in Ar and H 2 gas environment (Ar =150 ml/min, H 2 =75 ml/min) for 2 hour. Synthesized nanopillars are vertical over the silicon substrate. Energy dispersive x-ray (EDX) analysis shows that the pillar structures are formed of Si, O and Mn, wherein the catalyst Mn has been found in the form of MnO at the tip of the nanopillar, inferred from the EDX, X-ray magnetic-circular dichroism (XMCD) and near edge x-ray fine structure (NEXAFS) analysis. HETEM analysis shows the tip as well as the pillars are amorphous. The MnO tip has magnetic nature as concluded by XMCD studies of the samples. Spectral features of Mn K-edge EXAFS reveals that Mn is in 2+ state and coordinated in tetrahedral symmetry. Copy Right, IJAR, 2013,. All rights reserved.

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Section: Results and Discussion:-mentioning

confidence: 99%

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Rawat¹,

Kumar²,

Kumari³

2016

IJAR

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“…For their statistical description as a plasma constituent, their inner structure can be neglected provided that additional variables representing their microstate are defined (Ignatov et al. 2002). These mesoscopic variables, as a result of interaction with the plasma, vary with the local plasma parameters and can be considered as new phase-space variables.…”

Section: Spectral Densities Of Fluctuations and Low-frequency Enhancementioning

confidence: 99%

“…Dusty (complex) plasmas versus collisionless multicomponent plasmas In contrast to electrons and ions which are classically point particles and their microstate in the system can be defined solely by position and momentum, dust grains possess an internal structure. For their statistical description as a plasma constituent, their inner structure can be neglected provided that additional variables representing their microstate are defined (Ignatov et al 2002). These mesoscopic variables, as a result of interaction with the plasma, vary with the local plasma parameters and can be considered as new phase-space variables.…”

Section: Introductionmentioning

confidence: 99%

The finite probe size effect in fluctuation measurements; application to dusty plasmas

et al. 2016

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The effect of the finite probe size in plasma fluctuation measurements is revisited for dusty plasmas, where it has been argued that dust leads to a significant low-frequency enhancement in the spectral densities of ion density fluctuations, which can constitute the physical basis of a dust diagnostic technique. Theoretical predictions for the spectral modifications are presented and the dust acoustic mode contribution is analysed. The finite probe size effect is treated within the volume average approach, which introduces geometry dependent form factors that are calculated for spherical and cylindrical probes. The volume average approach is compared with the typically employed cutoff wavenumber approximation for various dust and plasma parameters. The contribution of temperature fluctuations to the spectral density of current fluctuations is also evaluated.

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“…Microscopic and subsequently statistical/mechanical and kinetic studies of particle interactions in dusty plasmas, including modelling of electron and ion absorption by dust, are also central in papers by Sitenko et al (1996), Schram et al (2000) and Zagorodny et al (2000), and are both of general character and aimed at specific studies, such as dust crystal formation and crystal melting. We also mention that the effects of mass growth of dust is another topic under study: Ignatov et al (2002) and references therein consider such effects, together with the effects of dust rotation, neglecting charging, on a kinetic level.…”

Section: Introductionmentioning

confidence: 99%

A kinetic and macroscopic description of dust in a plasma, including collision, charging and charge spread effects on diffusion and waves

Øien

2003

J. Plasma Phys.

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A generalized, but simplified, kinetic equation for the distribution F of a dust component in a plasma is derived in the seven-dimensional phase space (r, v, Q), where Q is the dust particle charge. The equation for F (r, v, Q, t) takes into account charging, charge spread, collisions and an electric field. The charge Q is considered to vary continuously. From the equation we find an analytic solution for the evolution of dust in the seven-dimensional phase space that shows collisionless diffusion owing to the combined effects of charging, charge spread and a constant electric field. We also derive a 'vector kinetic equation' of dust and subsequently a set of macroscopic equations, and show that the equations lead to a generalized classical diffusion of dust particles owing to fields and nonuniformities, collisions and charging, including charge spread, and to plasma wave effects including damping caused by charging and charge spread in the collisionless case.

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Rotational kinetics of absorbing dust grains in neutral gas

Cited by 12 publications

References 20 publications

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

The finite probe size effect in fluctuation measurements; application to dusty plasmas

A kinetic and macroscopic description of dust in a plasma, including collision, charging and charge spread effects on diffusion and waves

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