Anomalous Schottky Signals from a Laser-Cooled Ion Beam

Research output: Contribution to journalArticle


Longitudinal Schottky signals from
a laser-cooled, spatially dense, ion
beam have been studied in
the ASTRID storage ring. The
fluctuation signals are distorted
by the effects of space charge, as
is observed in electron cooling experiments.However,the spectra also exhibit previously unobserved
coherent components. The ions' velocity distribution, measured by a
laser fluorescence technique, suggests that the coherence is
due to suppression of Landau damping. The observed behavior has
important implications for the attainment of a crystalline ion beam
in a storage ring.


  • Ana Labrador
  • J. S. Hangst
  • V. Levedev
  • N. Madsen
  • J. S. Nielsen
  • O. Poulsen
  • P. Shi
  • J. P. Schiffer
External organisations
  • Aarhus University
  • Argonne National Laboratory
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Number of pages4
JournalPhys. Rev. Lett.
Issue number1
Publication statusPublished - 1995 Jan 2
Publication categoryResearch

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