On the thermophoresis in dense dust structures in neon plasma

Шумова, В. В.; Polyakov, D. N.; Mataybaeva, E.K.; Vasilyak, L. M.

doi:10.1016/j.physleta.2019.125853

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…Due to the lesser importance of the void in dc discharge plasmas, we leave its consideration out of the scope of our review and only provide the references to the existing, also rather extensive literature. [212,213,220,[269][270][271][272][273][274][275][276] The void appears if the CCRF discharge power exceeds a certain threshold, as it was observed in experiments [16,55] and reproduced in simulations. [69,218,219,277] The dependence of the void onset on the pressure is not clear.…”

Section: Voidmentioning

confidence: 99%

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Physical aspects of dust–plasma interactions

Pustylnik

Pikalev

Zobnin

et al. 2021

Contributions to Plasma Physics

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Low‐pressure gas discharge plasmas are known to be strongly affected by the presence of small dust particles. This issue plays a role in the investigations of dust particle‐forming plasmas, where the dust‐induced instabilities may affect the properties of synthesized dust particles. Also, gas discharges with large amounts of microparticles are used in microgravity experiments, where strongly coupled subsystems of charged microparticles represent particle‐resolved models of liquids and solids. In this field, deep understanding of dust–plasma interactions is required to construct the discharge configurations which would be able to model the desired generic condensed matter physics as well as, in the interpretation of experiments, to distinguish the plasma phenomena from the generic condensed matter physics phenomena. In this review, we address only physical aspects of dust–plasma interactions, that is, we always imply constant chemical composition of the plasma as well as constant size of the dust particles. We also restrict the review to two discharge types: dc discharge and capacitively coupled rf discharge. We describe the experimental methods used in the investigations of dust–plasma interactions and show the approaches to numerical modelling of the gas discharge plasmas with large amounts of dust. Starting from the basic physical principles governing the dust–plasma interactions, we discuss the state‐of‐the‐art understanding of such complicated, discharge‐type‐specific phenomena as dust‐induced stratification and transverse instability in a dc discharge or void formation and heartbeat instability in an rf discharge.

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Section: Voidmentioning

confidence: 99%

Section: Specific Phenomenamentioning

confidence: 99%

Physical aspects of dust–plasma interactions

Pustylnik

Pikalev

Zobnin

et al. 2021

Contributions to Plasma Physics

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“…They will move and gradually form a particular structure under the action of these forces. One of the typical phenomena resulting from the dust transport processes is that a stable dust-void with a distinct boundary can be formed in the discharge tube [18][19][20][21][22][23][24][25][26][27]. In order to study the spatial and time evolution processes of dust and plasma parameters in the discharge tube, it is necessary to consider the transport process of dust particles in the theorical simulation model of discharge dusty plasmas.…”

Section: Introductionmentioning

confidence: 99%

Simulation of DC glow discharge plasma with free-moving dust particles in the radial direction

Tian

Liang

Hao

et al. 2023

Plasma Sci. Technol.

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A self-consistent fluid model is developed to investigate the radial distributions of dusty plasma parameters in a DC glow discharge, in which the extended fluid approach of plasma particles and the transport equations of dust particles are coupled. The electrical interaction between charged dust particles is considered in the model. The time evolution of radial distributions of dust density, the plasma density, the radial component of electric field and the forces acted on dust particles when dust density tends to be stable are obtained and analyzed under different discharge currents and dust particle radius. It is shown that the dust density structure is determined mainly by the radial electrostatic force, thermophoretic force and ion drag force in the discharge tube, and both discharge current and dust particle radius have an obvious effect on the transport processes of dust particles. The dust particles gather in the center region of discharge tube for low discharge current and little dust radius, then dust-voids are formed and become wider when the discharge current and dust radius increase. The plasma parameters in the dust gathering region are affected obviously by the dust particles due to the charging processes of electrons and ions to dust surface.

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“…The authors suggested that the microparticles modified the temperature gradient in the plasma. The effect could also be explained by a modification of the thermophoretic force in a dense microparticle suspension in comparison with the force for a single particle [15].…”

Section: Introductionmentioning

confidence: 99%

Measurement of gas temperatures in dust-free and dusty argon discharges

Pikalev

Pustylnik

Räth

et al. 2019

J. Phys. D: Appl. Phys.

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Gas temperatures in an argon low-power capacitively-coupled rf discharge were measured by means of tunable diode laser absorption spectroscopy on 1s 5 metastable states. It was shown that the uncertainty of the measurements in dust-free plasma could be minimized to ±1 K. In the presence of dust, due to instabilities in the dust subsystem (e.g. dust density waves), the uncertainty of the temperature measurements increased several times.Nevertheless, an evidence of the gas temperature increase in the presence of dust was detected. This result suggests that the microparticle suspensions, immersed in the low-pressure plasmas, significantly modify the temperature fields of the neutral gas.

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On the thermophoresis in dense dust structures in neon plasma

Cited by 10 publications

References 32 publications

Physical aspects of dust–plasma interactions

Physical aspects of dust–plasma interactions

Simulation of DC glow discharge plasma with free-moving dust particles in the radial direction

Measurement of gas temperatures in dust-free and dusty argon discharges

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