Phys. Rev. E 66, 036501 (2002) [9 pages]Three-dimensional crystalline ion beamsReceived 9 October 2001; published 10 September 2002 We report on the experimental realization of two- and three-dimensional crystalline ion beams in the rf quadrupole storage ring PALLAS (LMU, Munich). At a beam energy around 1 eV the phase transition to the Coulomb ordered state is identified by a sudden decrease of the spatial width and of the velocity spread of the beam. The focusing conditions required to attain crystalline beams up to structures of helices surrounding a string are systematically investigated and related to the situation in typical heavy ion storage rings. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.66.036501
DOI:
10.1103/PhysRevE.66.036501
PACS:
29.20.Dh, 41.75.-i, 52.27.Gr
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