Trapped electrons, trapped ions and quantum effects contributions in instability analysis of dust acoustic waves in dense quantum plasma

El-Monier, S.Y.; Nisar, Kottakkaran Sooppy; Mahmoud, Mona; Atteya, A.

doi:10.1016/j.cjph.2024.05.024

Cited by 1 publication

(2 citation statements)

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“…In the future, we will study the effect of increasing the density of the dust particles within the sheath. Collective behavior may occur and dust acoustic waves may be excited [13,65,66]. Additionally, the existence of dust particles within the sheath modifies the sheath dielectric tensor, which in turn changes the ratio of the wave impedance to the sheath.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, they may pose a considerable risk to the security of future fusion devices and affect their performance and longevity [6][7][8][9][10][11]. In addition, dust particles are found to excite unstable drift waves that affect tokamak operation at a much earlier stage [12,13]. Furthermore, the study of the ratio of incoming wave impedance to sheath impedance has been conducted, which determines the characteristics of the interaction, ranging from quasi-conducting to quasi-insulating, or in the case of matched impedances, to either perfect absorption or a sheath-plasma resonance [14,15].…”

Section: Introductionmentioning

confidence: 99%

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The effect of the electron κ-distribution on the dust particle charging in the radio-frequency thermal-sheaths

Shihab,

Elkamash

2024

Phys. Scr.

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In order to investigate collisionless radiofrequency plasma sheathscontaining dust particles, three models are utilized:the novel kinetic scheme. Ensemble-in-Spacetime (EST) model for calculating sheath parameters, the DustParticle Charging model, and the Single Dust Particle model. The EST model hasbeen modified to account for κ-electron distributions.This model is applicable to radiofrequency plasma sheaths found in tokamaks equipped with an ion cyclotronradiofrequency (ICRF) wave heating system, such as JET, West(Tore Supra), EAST,ASDEX-U, and KSTAR. The calculated sheath parameters are utilized to determinethe electron and ion currents of the dust particles. In the intermediate radio-frequencyregime, when the ion plasma frequency is comparable to the ICRF, the flux and energyof the ions are modulated in time within the sheath. The ions are not inertialess, andthe value of κ affects the electron and ion densities.As the value of κ increases, the time-averaged electron and ion densities, sheath edge position, and area of thesheath voltage-sheath charge hysteresis loop also increase. However, the ion energydistribution remains insensitive to the κ distribution. The dust particles are chargedwith different negative charges based on their radius, position within the sheath, κ-electron distribution, and sheath potential. These particles exhibit oscillatory motiondue to their interactions with the plasma and gravitational fields and are acceleratedtoward the plasma core.

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Section: Resultsmentioning

confidence: 99%