Dust acoustic modes in strongly coupled dusty plasmas
- Univ. of California, San Diego, La Jolla, CA (United States). Dept. of Electrical and Computer Engineering
- Boston Coll., Chestnut Hill, MA (United States). Dept. of Physics
Dust grains, or solid particles of micron to sub-micron size, are observed in various space plasma environments (e.g. planetary rings, comets, noctilucent clouds) and also various low temperature laboratory plasmas (e.g. process plasmas, plasma crystals). Dust grains in a plasma are generally highly charged, and the presence of massive charged dust particles has been shown to lead to new low frequency modes such as dust-acoustic waves within the context of standard plasma theory. In this paper the authors investigate the dispersion relation for dust-acoustic waves in a three-component plasma with strongly coupled negatively charged dust grains, and classical electrons and positive ions. In doing this, they examine the use of the quasi-localized charge approximation scheme, generalized to take into account electron and/or ion screening. This scheme relates the small-k dispersion to the total correlation energy of the system which can be determined either through analytic or numerical simulation methods. Some effects of charged particle-neutral collisions are also taken into account. Applications to laboratory dusty plasmas are discussed.
- OSTI ID:
- 449471
- Report Number(s):
- CONF-960634-; TRN: IM9714%%28
- Resource Relation:
- Conference: 1996 IEEE international conference on plasma science, Boston, MA (United States), 3-5 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of IEEE conference record -- Abstracts: 1996 IEEE international conference on plasma science; PB: 324 p.
- Country of Publication:
- United States
- Language:
- English
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