Influence of the Plasma Absorption on the Longitudinal Dust Lattice Waves in Dusty Plasmas

Abstract

We investigate the influence of the plasma absorption on the longitudinal dust lattice wave in highly collisional dusty plasmas. The dispersion relation for the dust lattice wave has been obtained by the considering of the screened effective nearest-neighbor interactions. It is found that the plasma absorption effect strongly suppresses the frequency of the longitudinal dust lattice wave. It is also found that the frequency of the dust lattice wave decreases with increasing the inter-dust grain spacing. In addition, we have found that the frequency of the dust lattice wave decreases with an increase of the ratio of the electron temperature to the ion temperatures, in dusty plasmas. Hence, we have found that the amplitudes of the dust lattice waves in one-temperature plasmas are always greater than those in highly nonequilibrium dusty plasmas.

The nonlinear longitudinal lattice waves in a one-dimensional dusty chain with the plasma absorption effect

“…In order to research the impacts of the absorption effect for shock wave structure in a one-dimensional dust chain, the parameters used by Ki and Jung, 18) i.e.…”

“…Previously, most research works focused on lattice dispersion and nonlinear structure in a dust lattice, and adopted the classical Debye-Hückel (Yukawa) potential or a potential of mutual attraction in addition to the Debye-Hückel potential. However, the interactions between particles are affected by other factors besides the Debye-Hückel potential, such as the plasma absorption effect on the dust particle, [17][18][19] "ion shadowing" interaction caused by constant plasma absorption, 20) ionization and recombination of electrons and ions, 21) "ion wake" due to ion flow in the sheath, 22) corrected shielding potential and so on. 23,24) Nosenko et al studied the parameter excitation process of dust lattice waves, and pointed out that the deviation of simulation results and experimental results may be because the dust particles interaction is not strictly Yukawa potential.…”

“…26) Ki et al studied the effect of plasma absorption on the longitudinal dust lattice wave and concluded that plasma absorption affects the dispersion relationship of the dust lattice. 18) Therefore, it is can be predicted that plasma absorption will also have a significant effect on dust crystals' nonlinear wave structures. As a plasma system, dusty plasma is also a multipledegree-of-freedom system with abundant nonlinear and dissipation effects.…”

Effects of nonlinear plasma wake field on the dust-lattice wave in complex plasmas

“…It would then be expected that the influence of the nonlinear ion wake field enhances the frequency of the dust-lattice wave. Recently, the physical characteristics of dust-lattice waves (Ishihara 1998; Nam & Jung 2012; Ki & Jung 2013) have been investigated in complex dusty plasmas. In addition, the various atomic collision processes (Jung & Hong 2012; Hong & Jung 2014) including the influence of the ion wake field have been investigated in complex dusty plasmas.…”

Modified screening interaction potential on dust lattice waves in dusty plasma ring

“…[20][21][22][23][24][25] Among them, the Debye-Hückel (Yukawa) interaction potential is famous and most widely considered one. [1][2][3]13,14,[17][18][19] However, in fact, the dust particle interactions can vary considerably with a number of other factors, for example, plasma absorption on the particle surface, 20,21) electron and ion ionization and recombination in a plasma surrounding particles, 22) constant plasma absorption on the particle surfaces cause the so-called "ion shadowing" interaction, 23) the ion flow in the sheath give rise to "ion wakes", 16) and so on. As pointed by Khrapak et al 24) and Kompaneets et al, 25) the interaction among dust grains are generally repulsive.…”