Phys. Rev. Lett. 93, 165004 (2004) [4 pages]Dust Coulomb Balls: Three-Dimensional Plasma Crystals
First experimental investigations of spherical three-dimensional plasma crystals consisting of hundreds or thousands of micrometer-sized polymer particles suspended in a radio-frequency gas discharge are described. These “Coulomb balls” are not subject to the formation of dust-free regions (voids) and have an unusual structure of nested crystalline shells. While small systems are in a solid phase, large systems show melting effects. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.165004
DOI:
10.1103/PhysRevLett.93.165004
PACS:
52.27.Lw, 52.27.Gr, 52.35.Fp, 82.70.Dd
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