Journal article
Phonons in a one-dimensional Yukawa chain: Dusty plasma experiment and model
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, Vol.71(4), pp.046410-046410
04/01/2005
DOI: 10.1103/PhysRevE.71.046410
PMID: 15903797
Abstract
Phonons in a one-dimensional chain of charged microspheres suspended in a plasma were studied in an experiment. The phonons correspond to random particle motion in the chain; no external manipulation was applied to excite the phonons. Two modes were observed, longitudinal and transverse. The velocity fluctuations in the experiment are analyzed using current autocorrelation functions and a phonon spectrum. The phonon energy was found to be unequally partitioned among phonon modes in the dusty plasma experiment. The experimental phonon spectrum was characterized by a dispersion relation that was found to differ from the dispersion relation for externally excited phonons. This difference is attributed to the presence of frictional damping due to gas, which affects the propagation of externally excited phonons differently from phonons that correspond to random particle motion. A model is developed and fit to the experiment to explain the features of the autocorrelation function, phonon spectrum, and the dispersion relation.
Details
- Title: Subtitle
- Phonons in a one-dimensional Yukawa chain: Dusty plasma experiment and model
- Creators
- Bin LiuJ Goree - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, Vol.71(4), pp.046410-046410
- DOI
- 10.1103/PhysRevE.71.046410
- PMID
- 15903797
- ISSN
- 1063-651X
- eISSN
- 1095-3787
- Language
- English
- Date published
- 04/01/2005
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199821202771
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