Spectral Study of Glow Discharge With Dusty Structures

Pikalev, Aleksandr; Kobylin, Vladimir; Semenov, A. V.

doi:10.1109/tps.2017.2763742

Cited by 2 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the main conclusions is that the axial electric field E z and the electron temperature both increase in a positive column with a dust cloud: these facts are confirmed by the results obtained in various gases under similar conditions [32][33][34][35][36][37][38][39][40]. Spectroscopic and probe measurements also confirm these effects [41][42][43]. It should be noted that the microparticles can change the electron energy distribution function in the plasma by absorption of the highenergy electrons, which overcome the negative potential of the microparticles [35,44,45].…”

supporting

confidence: 58%

Determination and control of ion parameters in complex plasma of a DC discharge

Polyakov

Шумова

Vasilyak

2021

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

Complex plasmas, comprising a low-pressure DC discharge plasma and charged microparticles, form traps that can accumulate and localize ions. A loss of ions and electrons always occurs on the surfaces of the microparticles, which can lead to a decrease in the ion and electron densities in the plasma bulk. However, in most cases, the collective effect of the interaction between the discharge plasma and the dust cloud leads to an increase in the ion density-both around and inside the dust cloud-in comparison with that in pure plasma at the same discharge currents. Complex plasmas are open dissipative synergetic systems. Feedback between plasma processes allows one to control their properties using the external influences of various physical fields. Such influences thus represent a tool for controlling the dust cloud parameters and the ion density. In this letter, we report a method for determining the ion density inside a dust cloud using an electric field-current diagram (ECD). This method is based on the statement that only a single electric field can relate the particular values of the ion density, the discharge, and the dust cloud parameters. Our method includes a procedure for superimposing the ECD on the ion density-current diagram. To calculate the plasma parameters, a fluid model of a DC discharge with microparticles is employed. The method proposed herein allows us to find the conditions under which the ion density in a plasma with microparticles is less than that in pure plasma without microparticles-or vice versa, increases up to five times.

show abstract

supporting

confidence: 58%

Determination and control of ion parameters in complex plasma of a DC discharge

Polyakov

Шумова

Vasilyak

2021

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…[141][142][143][144] However, the importance of qualitative information delivered by the OES should not be underestimated. Spatial profiles of the intensities of the spectral lines [55,99,137,145,146] or change of the ratio of the spectral lines between the dusty and dust-free conditions [147] may contain very important signs for the understanding of the physics of dust-plasma interactions. So-called branching ratio methods [148] can be used to determine the densities of metastable states.…”

Section: Optical Emission Spectroscopymentioning

confidence: 99%

Physical aspects of dust–plasma interactions

Pustylnik

Pikalev

Zobnin

et al. 2021

Contributions to Plasma Physics

View full text Add to dashboard Cite

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.

show abstract

Spectral Study of Glow Discharge With Dusty Structures

Cited by 2 publications

References 10 publications

Determination and control of ion parameters in complex plasma of a DC discharge

Determination and control of ion parameters in complex plasma of a DC discharge

Physical aspects of dust–plasma interactions

Contact Info

Product

Resources

About