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Title: Ion wake formation with dust charge fluctuation in complex plasma

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.
Authors:
;  [1]
  1. Department of Physics, Tezpur University, Tezpur, Assam, 784 028 (India)
Publication Date:
OSTI Identifier:
22218466
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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