Conference proceeding
Experimental studies of two‐dimensional and three‐dimensional structure in a crystallized dusty plasma
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol.14(2), pp.519-524
Dusty plasmas—’95 workshop on generation, transport, and removal of particles in plasmas
03/01/1996
DOI: 10.1116/1.580118
Abstract
Coulomb crystallization of monodisperse 9.4‐μm‐diam spheres confined in a plasma is investigated in a modified GEC rf Reference Cell using various gases and electrode topographies. For some plasma conditions, planar electrodes confine particles radially in a few horizontal layers due to the curvature of the sheath boundary, and a two‐dimensional (2D) hexagonal lattice is observed which structural analysis shows to be consistent with the intermediate ‘‘hexatic’’ phase of KTHNY 2D melting theory. A depression in the electrode surface causes a corresponding depression in the sheath and allows trapping of more layers in a three‐dimensional (3D) structure, which is viewed in cross section by video imaging of a plane illuminated by a horizontal laser sheet. To synthesize 3D images, a stack of 2D images is made by moving the laser sheet and camera focal plane vertically through the particle cloud. This reveals regions of two stable 3D configurations within the cloud: body‐centered‐cubic and simple hexagonal with vertically aligned particles.
Details
- Title: Subtitle
- Experimental studies of two‐dimensional and three‐dimensional structure in a crystallized dusty plasma
- Creators
- J. B. Pieper - University of IowaJ. Goree - University of IowaR. A. Quinn - Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242
- Resource Type
- Conference proceeding
- Publication Details
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol.14(2), pp.519-524
- Conference
- Dusty plasmas—’95 workshop on generation, transport, and removal of particles in plasmas
- DOI
- 10.1116/1.580118
- ISSN
- 0734-2101
- eISSN
- 1520-8559
- Number of pages
- 6
- Language
- English
- Date published
- 03/01/1996
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984428827802771
Metrics
1 Record Views