Arbitrary amplitude dust-acoustic double-layers in an electron-depleted dusty plasma with two high-energy tail ion distributions

Abstract

Arbitrary amplitude dust-acoustic double-layers (DA-DLs) in two high-energy tail ion distributions are investigated. The electron number density has been assumed sufficiently depleted during the charging of dust grains on account of the attachment of background plasma electrons on the surface of dust grains. It is found that under certain conditions DA-DLs may be admitted. The degree of suprathermality of the low-temperature component has a sensitive role on their formation and a small change in this degree can even prevent the DL formation. The ‘Maxwellianization’ of the high-temperature component involves a suprathermalization process of the low-temperature component for the existence of localized DA-DLs. Our results may be relevant to a number of space dusty plasma systems, particularly the Saturn's F-ring where electron depletion and suprathermality are thought to come into play.

Electrostatic Dust-Acoustic Rogue Waves in an Electron Depleted Dusty Plasma

“…The mechanism of electron depletion is considered as the maximum number of electrons that are inserted onto the massive negative dust grains from the background of DPM during the dust charging process, and the medium in which the electron depletion process occurs is known as electron depleted DPM (EDDPM) [21][22][23]. The laboratory observation of low phase velocity DAWs is associated with significant depletion of the electron number density, suggesting that the wave dynamics is governed by the inertia of the dust fluid and the pressure of inertialess ions only [12,[24][25][26].…”

Electrostatic dust‐acoustic envelope solitons in an electron‐depleted plasma

“…Borhanian and Shahmansouri [ 11 ] considered a three‐component DPM having inertial massive negative DGs and inertia less two temperature ions, and investigated DASWs in the presence of two temperature super‐thermal ions, and highlighted that the phase velocity increases with ion population but decreases with ion temperature. Mayout and Tribeche [ 12 ] theoretically analysed DA double‐layers (DADLs) in an EDP, and graphically recognized that the amplitude of the DADLs causes to decrease with super‐thermality of the plasma species. Sahu and Tribeche [ 13 ] studied small‐amplitude DADLs in a two‐component non‐thermal EDP.…”

Electrostatic dust-acoustic envelope solitons in an electron depleted plasma

“…Borhanian and Shahmansouri [11] considered a three-component DPM having inertial massive negative DGs and inertialess two temperature ions, and investigated DASWs in presence of two temperature super-thermal ions, and highlighted that the phase velocity increases with ion population but decreases with ion temperature. Mayout and Tribeche [12] theoretically analyzed DA double-layers (DADLs) in an EDP, and graphically recognized that the amplitude of the DADLs causes to decrease with super-thermality of the plasma species. Sahu and Tribeche [13] studied small amplitude DADLs in a two-component non-thermal EDP.…”