Glow Discharge Positive Column with Dust Particles in Neon

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

doi:10.1002/ctpp.201200072

Cited by 28 publications

(39 citation statements)

References 14 publications

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“…The influence of dust structures with such quantity of particles on the CVC is minor [13,14]. Still, the discharge voltage drop ∆U related to the total number of dust particles N d measured on the identical length of discharge, is much higher at cryogenic temperature, than at room temperature: ∆U/N d room ≈ 10 −5 V/particle, ∆U/N d LN2 ≈ 10 −3 V/particle.…”

Section: Resultsmentioning

confidence: 99%

“…For the optic measurement of size of dust structure (11) and the discharge luminescence in the axial and transverse sections, the cryostat was supplied with flat quartz windows (12) at the end surface and along the cryostat length (see figure 1). The images of dust structures were registered in a reflected light of a flat laser beam (13) with the help of a microscope and video camera (14). The flat laser beam was formed after a passage of radiation from laser through the optical system consisting of two cylindrical lenses (15).…”

Section: Methodsmentioning

confidence: 99%

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Formation of the structures from dusty clusters in neon dc discharge under cooling

Polyakov

Шумова

Vasilyak

2016

J. Phys.: Conf. Ser.

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Abstract. The formation of structures consisted of dusty clusters in plasma at the discharge tube cooling to a temperature of liquid nitrogen was discovered. The dependence of the reduced electric field in the positive column of a discharge on gas temperature was experimentally measured. Depending on the pressure of neon were observed the different structural transitions in the regions of growing current-voltage characteristics at low discharge currents ≤ 1 mA. It was found that the regions of existence of structured clusters and the regions of structural transitions were characterized by the higher values of the reduced electric field than the regions of destruction of ordered structures.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Formation of the structures from dusty clusters in neon dc discharge under cooling

Polyakov

Шумова

Vasilyak

2016

J. Phys.: Conf. Ser.

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“…We note that both these approaches are widely used. For simulations of positive column of glow discharge, Sukhinin et al [27] used the first approach, while Vasilyak et al [28] used the second approach. In section 2, the model discharge is described, it contains the initial and boundary condition as well as the numerical procedure.…”

Section: Introductionmentioning

confidence: 99%

Investigations of argon and neon abnormal glow discharges in the presence of metastable atom density with fluid model

2016

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In this manuscript an investigation of a DC argon and neon abnormal glow discharges with metastable atom density is presented. The values of pressure lie between 133.32 and 330 Pa, and the voltage ranges from 250 to 400 V in the case of argon gas. In the case of neon gas, the pressure has a value of 399.92 Pa (3 Torr) and the voltage ranges from 300 to 500 V. In this framework, an analysis of abnormal glow discharge characteristics is carried out in the case of input data taken from the Boltzmann equation in the multi-term approximation, and in the case of input data obtained from BOLISG+ code. With these differences of input data in the same gas, the output results are different; it appears in the cathodic region. The spatio-temporal distributions of electron and ion densities, the potential and electric field, the mean electron energy and the metastable atom density are shown. A 1D fluid model is used to solve self-consistently the first three moments of the Boltzmann’s equation coupled with the Poisson’s equation. The role of the presence of metastable atom density in the fluid model is clearly because of the domination of ionization processes by both stepwise and penning ionizations. Our results are validated with those obtained by both recent paper and experimental results.

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“…Here, a drift-diffusion equation for negatively charged dust particles was used (as in Refs. [33][34][35]37,[49][50][51]53,56,60,61,67]):…”

Section: Modelmentioning

confidence: 99%

Dust-void formation in a dc glow discharge

et al. 2015

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Experimental investigations of dusty plasma parameters of a dc glow discharge were performed in a vertically oriented discharge tube. Under certain conditions, dust-free regions (voids) were formed in the center of the dust particle clouds that levitated in the strong electric field of a stratified positive column. A model for radial distribution of dusty plasma parameters of a dc glow discharge in inert gases was developed. The behavior of void formation was investigated for different discharge conditions (type of gas, discharge pressure, and discharge current) and dust particle parameters (particle radii and particle total number). It was shown that it is the ion drag force radial component that leads to the formation of voids. Both experimental and calculated results show that the higher the discharge current the wider dust-free region (void). The calculations also show that more pronounced voids are formed for dust particles with larger radii and under lower gas pressures.

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Glow Discharge Positive Column with Dust Particles in Neon

Cited by 28 publications

References 14 publications

Formation of the structures from dusty clusters in neon dc discharge under cooling

Formation of the structures from dusty clusters in neon dc discharge under cooling

Investigations of argon and neon abnormal glow discharges in the presence of metastable atom density with fluid model

Dust-void formation in a dc glow discharge

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