Ion wake formation with dust charge fluctuation in complex plasma

Journal Article · Fri Nov 15 04:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4828716· OSTI ID:22218466

Bhattacharjee, Saurav; Das, Nilakshi ^[1]

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1. Department of Physics, Tezpur University, Tezpur, Assam, 784 028 (India)

In complex plasma, the interaction mechanism among dust grains near the plasma sheath is significantly influenced by the downward ion flow towards the sheath and dust charge fluctuation over grain surface. Asymmetric ion flow towards the sheath gives rise to well known attractive wake potential in addition to repulsive Yukawa type of potential. The present work shows that the charging dynamics play a significant role in modification of plasma dielectric response function and hence the interaction mechanism among test dust particulates. The effective Debye length is found to be a characteristic of dust size and background plasma response towards the grain along with ion flow speed. The potentials thus obtained show a damping in strength of interaction in the presence of dynamical charging of dust as compared to that of constant charge dust grains. The result also shows decrease in focal length of ion lensing with increase in grain size.

• OSTI ID: 22218466
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED-PARTICLE TRANSPORT
COMPARATIVE EVALUATIONS
DAMPING
DEBYE LENGTH
DIELECTRIC MATERIALS
DUSTS
FLUCTUATIONS
GRAIN SIZE
IONS
PLASMA
PLASMA POTENTIAL
PLASMA SHEATH
POTENTIALS
RESPONSE FUNCTIONS