Effect of dust grains on propagation of electromagnetic wave in a cold quantum dusty plasma (original) (raw)

Modified Dust-Lower-Hybrid Waves In Quantum Plasma

Scientific Inquiry and Review

Dust-lower-hybrid waves in quantum plasma have been studied. The dispersion relation of the dust-lower-hybrid wave has been examined using the quantum hydrodynamic model of plasma in an ultra-cold Fermi dusty plasma in the presence of a uniform external magnetic field. Graphical analysis shows that the electron Fermi temperature effect and the quantum corrections give rise to significant effects on the dust-lower-hybrid wave of the magnetized quantum dusty plasma.

A new property of electromagnetic wave interacting with dust-laden plasma

2008

The propagation pattern of electromagnetic waves (EMW) in dusty plasmas is quite different from that in electron-ion plasmas. For instance, here the ponderomotive force acts on dust grains as a negative pressure and that a nonlinear Schrodinger equation with an additional nonlinear term is obtained. Based on this equation, the modulation instability is examined and it is shown that the growth rate becomes maximum when that additional term compensates the diffraction term. The main part of this work is devoted to the localization of the grains by the EMW. Considering both subsonic and supersonic regimes it has shown that under certain conditions the grains are localized and the ions circum navigate the grains whereas the electrons escape from the region of localization. Further, the localization of grains by the EMW is found to be shape-dependent of the pulse. Pancake and light bullet shaped pulses have considered in the supersonic regime and have shown that only the light bullet shape leads to the compression of grains. Finally, investigating nonstationary solution, it is shown that for some parameters the nonlinear wave breaking and the formation of shock wave can take place.

Quantum effects in Bi-Dust plasmas

Physica Scripta, 2019

In this paper a theoretical approach has been carried out using a fluid model on a bi-dust plasma which consist of two dusts negative charged different particles in an electron–ion plasma. In such system, this fluid model describe a dense strong coupled heavy dust grain together with a weak coupled light dusty particle. The bulk is immersed in a system of electrons and ions dominated by a Thomas–Fermi density distribution, where interaction and propagation of solitary dust acoustic solitary waves will be analyzed. This investigation will be carried out for arbitrary amplitude of solitary dust acoustic waves. These are originated through the presence of both dust grains in the plasma system. Therefore, it is used a set of fluid equation which determine general expressions for the concentrations of different dust particles. The onset of the Sagdeev method is then employed in order to look for influence of the light component on the quantum system. In this way there is an increasing or...

Electromagnetic Waves in a Partially Ionized Dusty Plasma

2004

The propagation of low-frequency electromagnetic jbavcs in a partially ionized, self-gravitating magnetized dusty plasma has been theoretically studied. The electromagnetic waves having tl# wavelength of the order of a few AU and the frequency of the order of the order of 10"'2 are found to be unstable due to the effect of the self-gravitational force acting on the dust grains. On the other hand, the electromagnetic waves having relatively high-frequency (-10^ s •) are found to be damped due to the effect of the collisions of the plasma particles (namely, the electrons, the ions and the dust grama) with the background neutrals. The effects of the obliqueness of the wave propagation, the background neutral number density, the dust grain mass density, etc. are also observed to significantly modify the dispersion properties of such obliquely propagating electromagnetic waves. The present investigation may be of relevance to the formation fo stars in galaxies via the fragmentaion of partially ionized dusty plasma systems.

Investigation on Some Properties of Dusty Plasma, Applications and the Dust Effects on Nonlinear Wave Structures in Inhomogeneous Plasma

AkiNik Publications, New Delhi, India , 2022

Dusty plasma is a very recent and trending research field in plasma physics or in plasma sciences. The developments in plasma physics research are growing very rapidly. The wide applications of dusty plasma are observed in space, laboratory experiments, and astrophysical environments, etc. The effect of dust particles on some nonlinear wave structures in inhomogeneous plasmas is investigated and some fundamental properties of dusty plasmas are also studied along with their astrophysical and industrial applications.

Linear and Nonlinear Dust Ion Acoustic Waves in a Dense Quantum Magneto Plasma

International Journal of Optics and Photonics

In this article, linear and nonlinear dust ion acoustic (DIA) waves are studied in a magnetized quantum dusty plasma which consists of inertialess electrons and positrons, cold ions and negatively charged dust grains. For this purpose, quantum Hydrodynamic model (QHD) and reductive perturbation method are employed. To investigate linear and nonlinear waves, dispersion relation and a quantum Zakharov-Kuznetsov (ZK) equation are derived respectively. A stationary solution of the ZK equation is obtained to investigate the effects of plasma parameters on the amplitude of the solitons.

Waves in Magnetized Dusty Plasmas With Variable Charge on Dust Particles

IEEE Transactions on Plasma Science, 2004

We present results obtained in recent years for wave propagation in a magnetized dusty plasma, including variable charge of the dust particles, and using a kinetic approach. Two forms of the dielectric tensor are obtained, which can be used depending on the application to be done. This dielectric tensor is used in some applications, in order to study the importance and influence of the variable charge on dust particles in the wave propagation characteristics. We first consider the magnetosonic wave and show that the variable charge of the dust gives the possibility of absorption. We also analyze the spatial absorption of this wave, including effects up to second order in the Larmor radius. Finally, we analyze Alfvén waves behavior in such dusty plasmas. The dispersion relation and damping rates of this mode are obtained.

Small amplitude two dimensional electrostatic excitations in a magnetized dusty plasma with q qqq -distributed electrons

The propagation of linear and nonlinear electrostatic waves is investigated in magnetized dusty plasma with stationary negatively or positively charged dust, cold mobile ions and non-extensive electrons. Two normal modes are predicted in the linear regime, whose characteristics are investigated parametrically, focusing on the effect of electrons non-extensivity, dust charge polarity, concentration of dust and magnetic field strength. Using the reductive perturbation technique, a Zakharov-Kuznetsov (ZK) type equation is derived which governs the dynamics of small-amplitude solitary waves in magnetized dusty plasma. The properties of the solitary wave structures are analyzed numerically with the system parameters i.e. electrons non-extensivity, concentration of dust, polarity of dust and magnetic field strength. Following Allen and Rowlands (J. Plasma Phys. 53:63, 1995), we have shown that the pulse soliton solution of the ZK equation is unstable, and have analytically traced the dependence of the instability growth rate on the nonextensive parameter q for electrons, dust charge polarity and magnetic field strength. The results should be useful for understanding the nonlinear propagation of DIA solitary waves in laboratory and space plasmas.

Low frequency modes of propagation in strongly coupled degenerate dusty plasma

In the present work, the dust acoustic modes of strongly coupled quantum plasma have been examined considering the dust polarization force with degenerate electron and ion species. We have incorporated the statistical and diffraction effects of all the three plasma species i.e. electron, ion and dust grains. The normal mode analysis technique is used to obtain the general dispersion relation. Further, the general dispersion relation is discussed analytically as well as numerically for hydrodynamic and kinetic regimes. The numerical results for the strongly coupled degenerate plasma have been shown to see the effect of polarization force on dust acoustic modes.