Electrophysical Parameters of Plasma with a Charged Dust Cloud

Шумова, В. В.; Polyakov, D. N.; Vasilyak, L. M.

doi:10.1134/s1990793120060275

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…The considered physical parameters for collisional plasma are: plasma electron temperature, T pe = 5.5 eV; temperature of emitted electrons from the surface, T ee = 0. r d = 4.0 µm; electron impact ionization frequency for argon gas, g i = 0.048ω pi , where ω pi is the ion plasma frequency; ion loss rate, g a = 0.01 to 0.09ω pi ; gas temperature, T g = 0.0259 eV; and gas pressure, P n = 0.1-30 Pa. We have taken plasma parameters for the weakly coupled laboratory dusty plasma with a coupling parameter less than unity [63]. The plasma parameters taken are consistent with previous experimental and theoretical works [12,29,39,64,65]. The variation of gas pressure affects the electron emission from the surface, and the density distribution of emitted electrons in the sheath region for different values of gas pressure (P n ) is depicted in figure 3.…”

Section: Laboratory Collisional Dusty Plasmassupporting

confidence: 60%

Ion flow and dust charging at the sheath boundary in dusty plasma with an electron-emitting surface: applications to laboratory and lunar dusty plasmas

Basnet,

Patel,

Bikram Thapa

et al. 2024

Plasma Phys. Control. Fusion

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In laboratory and space plasmas, the emission of electrons from the surface significantly affects the characteristics of plasma sheath formed at that surface, which is crucial to understanding the overall plasma-wall interaction mechanism. In this work, the collisional fluid model is used for laboratory dusty plasma, whereas collisionless model is used for lunar dusty plasma. We have extended the Bohm sheath criterion for the formation of stable plasma sheath in account of electron emission from the surface, loss of ion flux, and gas pressure for the collisional laboratory dusty plasmas. It is found that ion flow at the sheath boundary is considerably influenced by the concentration of electron emission, ion loss term, and gas pressure. The evolution of dust charge explicitly determines the magnitude of ion flow at the sheath boundary. The plasma parameters adopted in the present case are reliable in laboratory and space dusty plasmas, especially dusty plasma environment on the lunar surface. The lunar surface and dust grains on the Moon become electrically charged as a result of the interaction between solar-wind plasma and photoemission electrons emitted from the lunar surface. In addition, the lunar plasma sheath characteristics, dust charging process, and stable dust levitation on the sheath region have been studied.

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Section: Laboratory Collisional Dusty Plasmassupporting

confidence: 60%

Ion flow and dust charging at the sheath boundary in dusty plasma with an electron-emitting surface: applications to laboratory and lunar dusty plasmas

Basnet,

Patel,

Bikram Thapa

et al. 2024

Plasma Phys. Control. Fusion

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“…We should not exclude the possibility that the air discharge quenching is determined by another indicator. Thus, in [64], it was assumed that the discharge quenching at the parameters considered therein can be associated with the criterion, which describes the influence of the charged dust cloud on the integral characteristics of the discharge. This criterion is the ratio of the charge of the dust cloud to the total linear charge of electrons.…”

Section: Stable and Metastable States Of Complex Plasmamentioning

confidence: 99%

Ion confinement efficiency and ionization balance in a complex DC discharge plasma

Polyakov¹,

Шумова²,

Vasilyak³

2022

Plasma Sources Sci. Technol.

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We consider the efficiency of an ion confinement inside a cloud of charged microparticles in a low-pressure DC discharge. To describe the ion confinement efficiency in such complex plasma, we propose the indicators calculated taking into account the processes responsible for the generation, the losses, and the accumulation of ions in a cloud of charged microparticles in a plasma using a fluid model. The efficiency of ion accumulation by a microparticle cloud shows the ratio of the average ion densities in discharge with microparticles and without them. The efficiency of ion accumulation by a microparticle shows the difference of average ion densities in a discharge with microparticles and without them, related to microparticle number density. The specific power costs of the existence of one ion in a microparticle cloud determines the linear power costs of the discharge in a cloud related to the linear number of ions in it. The power efficiency of ion accumulation by a microparticle cloud is defined as a ratio of specific power costs in a discharge without microparticles, to specific power costs of ion existence in a cloud. A strong dependence of indicators on the microparticle number density has been revealed. Inefficient conditions of ion confinement inside a cloud are found. Experimental data on dynamic instabilities of a discharge with microparticles was analyzed. It is found that efficiency of ion confinement is connected with dynamic processes in complex plasma. The limiting microparticle number density is shown to serve as the criterion of the occurrence of plasma instability. Exceeding the limiting microparticle number density results, generally, in the development of dynamic instability of complex plasma, and, in inefficient states, in quenching of the discharge.

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Influence of Metastable Atoms on the Heating of Microparticles in the Plasma of a Gas Discharge in Neon

Шумова

Polyakov

Vasilyak

2022

Russ. J. Phys. Chem. B

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Electrophysical Parameters of Plasma with a Charged Dust Cloud

Cited by 4 publications

References 18 publications

Ion flow and dust charging at the sheath boundary in dusty plasma with an electron-emitting surface: applications to laboratory and lunar dusty plasmas

Ion flow and dust charging at the sheath boundary in dusty plasma with an electron-emitting surface: applications to laboratory and lunar dusty plasmas

Ion confinement efficiency and ionization balance in a complex DC discharge plasma

Influence of Metastable Atoms on the Heating of Microparticles in the Plasma of a Gas Discharge in Neon

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