Conference proceeding
Monolayer plasma crystals: Experiments and simulations
FRONTIERS IN DUSTY PLASMAS, pp.91-97
01/01/2000
DOI: 10.1016/B978-044450398-5/50014-2
Abstract
Experiments and simulations are reported for two kinds of monolayer plasma crystals. In a monolayer with a small number of particles, ranging from 1-19, we measured the microscopic structure of very small crystals. The crystals have concentric rings. For certain numbers of particles, corresponding to 'closed-shells' in the outermost ring, the configurations are the same as for hard spheres. Yukawa molecular-dynamics simulations accurately reproduce our experimentals results. By adding far more particles (similar to 10,000) and operating at higher power, we discovered Mach cones. These are V-shaped shocks created by supersonic objects. They were detected in a two-dimensional Coulomb crystal. Most particles were arranged in a monolayer, with a hexagonal lattice in a horizontal plane. Beneath the lattice plane, a sphere moved faster than the lattice sound speed. The resulting Mach cones were double, first compressional then rarefactive, due to the strongly-coupled crystalline state. Molecular dynamics simulations using a Yukawa potential also show multiple Mach cones.
Details
- Title: Subtitle
- Monolayer plasma crystals: Experiments and simulations
- Creators
- J Goree - University of IowaD Samsonov - University of IowaZ W MaA Bhattacharjee - University of IowaH M Thomas - Max Planck Institute for Extraterrestrial PhysicsU Konopka - Max Planck Institute for Extraterrestrial PhysicsG E Morfill - Max Planck Institute for Extraterrestrial Physics
- Contributors
- Y Nakamura (Editor)T Yokota (Editor)P K Shukla (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- FRONTIERS IN DUSTY PLASMAS, pp.91-97
- Publisher
- Elsevier
- DOI
- 10.1016/B978-044450398-5/50014-2
- Number of pages
- 7
- Language
- English
- Date published
- 01/01/2000
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984442009502771
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