Dim and bright void regimes in capacitively-coupled RF complex plasmas

Pikalev, Aleksandr; Semenov, Igor; Pustylnik, Mikhail; Räth, Christoph; Thomas, Hubertus M.

doi:10.1088/1361-6595/abe0a2

Cited by 7 publications

(35 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, simulation with a 1D hybrid model and fixed microparticle distribution showed a linear growth of the electric field with increasing the microparticle number density without any critical phenomena [42]. According to recent findings [33], a steep growth of the electric field accompanies the transition between dim and bright void regimes. Since the heartbeat instability is accompanied by the flash inside the void, it is reasonable to suppose that the void contractions are caused by an abrupt transition between dim and bright void regimes.…”

Section: A Dim-to-bright Void Transition and Void Collapsementioning

confidence: 99%

“…microparticle suspension [27,[29][30][31]. However, this mechanism cannot explain the void formation at low discharge powers [32,33]. The experiment and the model in Ref.…”

Section: Introductionmentioning

confidence: 96%

“…The experiment and the model in Ref. [33] demonstrated that the void can exist in one of two regimes depending on the discharge power. The so-called bright void regime corresponds to the conditions with higher RF discharge power and is characterized by the bright emission inside the void.…”

Section: Introductionmentioning

confidence: 96%

“…A simplified time-averaged one-dimensional (1D) fluid model in Ref. [33] could reproduce the dim void only when the radial ion losses were artificially introduced into the microparticle-free region of the plasma. In this case, the force balance on the top and bottom void boundaries could be satisfied for low plasma density and with much weaker time-averaged electric field.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Heartbeat instability as auto-oscillation between dim and bright void regimes

et al. 2021

Self Cite

View full text Add to dashboard Cite

We investigated the self-excited as well as optogalvanically stimulated heartbeat instability in RF discharge complex plasma. Three video cameras measured the motion of the microparticles, the plasma emission, and the laser-induced fluorescence simultaneously. Comprehensive studies of the optogalvanic control of the heartbeat instability revealed that the microparticle suspension can be stabilized by a continuous laser, whereas a modulated laser beam induces the void contraction either transiently or resonantly. The resonance occurred when the laser modulation frequency coincided with the frequency of small breathing oscillations of the microparticle suspension, which are known to be a prerequisite to the heartbeat instability. Based on the experimental results we suggest that the void contraction during the instability is caused by an abrupt void transition from the dim to the bright regime [Pikalev et al., Plasma Sources Sci. Technol. 30, 035014 (2021)]. In the bright regime, a time-averaged electric field at the void boundary heats the electrons causing bright plasma emission inside the void. The dim void has much lower electric field at the boundary and exhibits therefore no emission feature associated with it.

show abstract

Section: A Dim-to-bright Void Transition and Void Collapsementioning

confidence: 99%

“…microparticle suspension [27,[29][30][31]. However, this mechanism cannot explain the void formation at low discharge powers [32,33]. The experiment and the model in Ref.…”

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heartbeat instability as auto-oscillation between dim and bright void regimes

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Section 6.2.1, we will show how these two principles help to understand the two regimes of void in a CCRF plasma. [ 55 ]…”

Section: Basic Phenomenamentioning

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

Comment on “Dispersion relation for the dust ionization and dust acoustic waves in the gas discharge complex plasma” [Phys. Plasmas 29, 073701 (2022)]

Pustylnik

2022

Physics of Plasmas

View full text Add to dashboard Cite

Dim and bright void regimes in capacitively-coupled RF complex plasmas

Cited by 7 publications

References 61 publications

Heartbeat instability as auto-oscillation between dim and bright void regimes

Heartbeat instability as auto-oscillation between dim and bright void regimes

Physical aspects of dust–plasma interactions

Comment on “Dispersion relation for the dust ionization and dust acoustic waves in the gas discharge complex plasma” [Phys. Plasmas 29, 073701 (2022)]

Contact Info

Product

Resources

About