Dusty plasma near a conducting boundary with dust-neutral collisions

Abstract

Using the usual fluid model the behavior of an unmagnetized dusty plasma near a conducting boundary with dust-neutral collisional effect is studied. The plasma consists of electrons, ions, negatively charged micron size dust particles, and neutrals. The Sagdeev potential for collisionless case is also calculated and found that it has different structure for plasmas with and without dusts. An expression for gradient of potential (i.e., the electric field) for collisional dusty plasma with dust–neutral collisions is calculated. The relation between the dust acoustic velocity and the collisionality has been discussed.

Cylindrical dissipative soliton propagation in nonthermal mesospheric plasmas

“…Experimentally, it was noted that dust laboratory plasmas contain a number of neutrals and the dusty-neutral collision affects the wave properties in plasma [12,13]. The effect of dust-neutrals collisions on the wave behavior in plasma were taken into account [14]. Popel et al reported that the anomalous wave dissipation causes the existence of new types of shock waves that are important for describing star formation and shocks in a supernova [15].…”

Weakly dissipative dust acoustic solitons in the presence of superthermal particles

“…In this context, Nakamura et al [8] examined the effects of collisions on ion acoustic waves and showed that the non-linear dynamics of the ion acoustic waves is significantly affected by the presence of the ion-dust collisions. Mahanta and Goswami [9] investigated the behavior of an unmagnetized dusty plasma in the vicinity of a conducting boundary by taking into account the collisions between the charged dust particulates and the neutrals. Wierling et al studied the dispersion relation for the DAWs by considering the dust-neutral collisions.…”

Oscillation of dust grains and the dust–Mach number associated with the dust–neutral collision in a plasma

“…Such plasmas are also observed near the solid bodies or the walls of the devices, such as artificial satellites, spacecrafts, and fusion plasmas. [8][9][10][11] However, not many simulational works on the effect of dust-neutral collisions and the velocity of dust grains have been done in dusty plasmas. The particulates occur in a range of sizes, 0.01-10 m being the most common although grains of 10 m or larger are also possible.…”

“…[1][2][3][4] In most cases, dust grains do not have well-defined mass, charge, and size, and thus it is often quite difficult to understand plasmas having such dust grains or fine particles. 11, the dust-acoustic velocity is not explicitly demonstrated, and an incorrect Mach number is derived as a result. [5][6][7] The particulates grow in size and vary in charge while in the discharge due to various chemical processes and plasma-wall interactions.…”