Dusty plasmas: synthesis, structure and dynamics of a dust cloud in a plasma

Mikikian, Maxime; Couëdel, Lénaïc; Cavarroc, Marjorie; Tessier, Yves; Boufendi, Laïfa

doi:10.1051/epjap/2009191

Cited by 30 publications

(26 citation statements)

References 56 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optical registration of dust structures in plasma was carried out by means of microscope (6) equipped with 50 fps high resolution camcorder (7) and diagnostic laser (8), and was synchronized with the electric measurements. The laser beam thickness of 150 μm (9) was smaller than the distance between the dust particles. The voltage drop across rings (4) was measured using 100 mps voltmeter (10) with input impedance of 1 G .…”

Section: Experimental Study Of Glow Discharge Positive Column With DImentioning

confidence: 97%

See 1 more Smart Citation

Study of glow discharge positive column with cloud of disperse particles

et al. 2011

View full text Add to dashboard Cite

Section: Experimental Study Of Glow Discharge Positive Column With DImentioning

confidence: 97%

“…Most recent study of the synthesis, spatial distributions and dynamics of a dust cloud in plasma is represented in [9]. However, only few works concern the influence of dust structures on plasma parameters.…”

Section: Introductionmentioning

confidence: 99%

Study of glow discharge positive column with cloud of disperse particles

et al. 2011

View full text Add to dashboard Cite

“…Lately, with the big achievement concerning electronic devices miniaturization, these dust particles could be used in many industrial applications related to nanotechnology. Dusty plasmas [3,4] can also be found in astrophysical environments [5], like almost everywhere (comet tails, planetary nebulae, atmospheres [6] and rings) or in fusion devices [7] like the future ITER.…”

Section: Introductionmentioning

confidence: 99%

Plasma inhomogeneities near the electrodes of a capacitively-coupled radio-frequency discharge containing dust particles

Tawidian

Mikikian

Couëdel

et al. 2011

Eur. Phys. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

To cite this version:Hagop Tawidian, Maxime Mikikian, Lénaïc Couëdel, Thomas Lecas. Plasma inhomogeneities near the electrodes of a capacitively-coupled radio-frequency discharge containing dust particles. European Physical Journal: Applied Physics, EDP Sciences, 2011, 56, pp.24018. 10 Abstract. Small plasma spheroids are evidenced and analyzed in front of the electrodes of a capacitivelycoupled radio-frequency discharge in which dust particles are growing. These regions are characterized by a spherical shape, a slightly enhanced luminosity and are related to instabilities induced by the presence of dust particles. Several types of behaviors are identified and particularly their chaotic appearance or disappearance and their rotational motion along the electrode periphery. Correlations with the unstable behavior of the global plasma glow are performed. These analyses are obtained thanks to high-speed imaging which is the only diagnostics able to evidence these plasma spheroids.

show abstract

“…The number density of constituents and energy balance equations were used to study the non-uniform dependence of the different variables on the dimensionless axial intensity of the beam; also, the computation was carried out to see The variation of the electron number density, n ea /n e , has been plotted against time [s] for different values of the dust grain number density n d in Figure 2. [43][44][45][46][47] Figure 5 shows the variation of the effective collision frequency with time. Figure 3 displays the variation of dust charge state with time, which indicates that the negative dust charge state decreases with time on account of the decreasing number density of electrons with increased dust density.…”

Section: Computing Outcomes and Discussionmentioning

confidence: 99%

Theoretical model for the effect of dust grains on self‐filamentation of a gaussian electromagnetic beam in a fully ionized plasma

Sharma

2018

Contributions to Plasma Physics

View full text Add to dashboard Cite

A theoretical model for the effect of dust grains on the self-filamentation of a Gaussian electromagnetic beam propagating in a fully ionized plasma has been developed by employing the energy balance of the plasma constituents, perturbed electron and ion concentrations, and temperature. In this model, neutral atom ionization, re-integration and accumulation of electrons and ions, photoelectric emission of electrons from the surface of dust grains, as well as elastic and charging collisions have also been considered. The effective dielectric constant in the presence of dust grains has been constructed. The effect of temporal growth of dust grains on various plasma parameters for different values of the dust density has been explored. The variation of the beam width with the normalized channel of propagation has been observed for distinct dust densities and dust charge states. It is observed that the non-linearity induced by the effective dielectric constant in the presence of dust grains increases the self-filamentation of the beam, thus enhancing the effective critical power with the dust density. Some of the outcomes of our approach are in line with experimental observations. These outcomes may be useful for explaining space and laboratory plasma experiments as well as for future studies in complex plasmas. KEYWORDScritical power, dusty plasmas, fully ionized plasma, propagation of beam, self-filamentation INTRODUCTIONSeveral investigations [1][2][3][4][5] have been carried out on complex plasmas because of their exclusive characteristics. Especially, self-filamentation has been attracting a lot of of interest in recent years because of the non-linear interaction of an electromagnetic (EM) beam in complex plasmas. Non-linearity appears because of the non-linear radial distribution of the intensity of the beam in complex plasmas and modifies the electron concentration, electron temperature, and dielectric constant. Collisional, relativistic, and ponderomotive non-linearity are the leading factors for carrying out research in the field of plasma applications.Collisional non-linearity appears as a result of heating of the plasma components due to the dissipation of energy of the EM beam propagating through the plasma. The energy gained by the electrons during this process is lost by thermal conduction as well as by electron collisions with ions, dust, and neutral particles. In a fully ionized plasma, the former mechanism becomes predominant because of the higher degree of ionization as 0 ( 2 0 ∕l 2 m ) << 1, where 0 (=2m e /m i ) is the fraction of energy loss due to collisions, m e and m i are the electronic and ionic masses, 0 is the initial width of the beam, and l m is the mean free path of collisions of the electrons.The importance of the subject has been confirmed by various researchers. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Sharma et al. [20] analysed the non-linear self-modulation of an EM beam in a dusty plasma. They measured the non-linear current density and change in the modulation

show abstract

Dusty plasmas: synthesis, structure and dynamics of a dust cloud in a plasma

Cited by 30 publications

References 56 publications

Study of glow discharge positive column with cloud of disperse particles

Study of glow discharge positive column with cloud of disperse particles

Plasma inhomogeneities near the electrodes of a capacitively-coupled radio-frequency discharge containing dust particles

Theoretical model for the effect of dust grains on self‐filamentation of a gaussian electromagnetic beam in a fully ionized plasma

Contact Info

Product

Resources

About