Study of Dusty Plasmas
Abstract
This progress report describes research work performed at Texas Tech University under AFOSR Grant No. F49620-97-1-0007 during the period of November 1,1996 to October 31, 1999. Theoretical and computational study of collective effects in dusty plasmas revealed (1) formation of oscillatory wake potential behind a highly charged dust grain placed in the ion flow in the sheath, (2) stable polygon structures formed by a collection of trapped dust particulates in the wake potential minima, (3) low frequency oscillations of order 10Hz associated with the polygon plasma crystal structure, (4) interaction of dust particulates and plasma particles through Hamiltonian formulation, (5) low frequency lattice oscillations (^1 Hz) described by Hamiltonian formulation, (6) The attractive interaction between dust particulates through exchange of phonons, (7) polarization of a dust grain in the order of a Debye length, (8) the higher threshold of the dust ion-acoustic instability with the effect of dust-charging process, and (9) Buneman-type streaming instability in a dust plasma developed in a subsonic ion flow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 2000
- Accession Number
- ADA373420
Entities
People
- Osamu Ishihara
Organizations
- Texas Tech University