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Marcel Mudrich

Longitudinal dynamics of laser-cooled fast ion beams: square-well buckets, space-charge effects, and anomalous beam behaviour

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisKonferenceartikelForskning

  • M. Weidemüller
  • ,
  • B. Eike
  • ,
  • U. Eisenbarth
  • ,
  • M. Grieser
  • ,
  • R. Grimm
  • ,
  • M. Lauer
  • ,
  • P. Lenisa
  • ,
  • A. Luger
  • ,
  • M Mudrich
  • U. Schramm
  • ,
  • D. Schwalm

We present recent results of our experiments on laser cooling of fast stored ion beams at the Heidelberg Test Storage Ring. The longitudinal motion of the ions is directly cooled by the light pressure force, whereas efficient transverse cooling is obtained indirectly by longitudinal-transverse coupling mechanisms. Laser cooling in novel bunch forms consisting of square-well buckets leads to longitudinally space-charge dominated beams. The observed longitudinal ion density distributions can be well described by a self-consistent mean-field model based on a thermodynamic Debye-Huckel approach. When applying laser cooling in square-well buckets over long time intervals, hard Coulomb collisions suddenly disappear and the longitudinal temperature drops by about a factor of three. The observed longitudinal behaviour of the beam shows strong resemblance with the transition to an Coulomb-ordered ion string.

OriginalsprogEngelsk
TidsskriftAIP Conference Proceedings
Sider (fra-til)194-202
Antal sider9
ISSN0094-243X
StatusUdgivet - 1999
BegivenhedInternational Conference on Trapped Charged Particles and Fundamental Physics - PACIFIC GROVE, Canada
Varighed: 31 aug. 19984 sep. 1998

Konference

KonferenceInternational Conference on Trapped Charged Particles and Fundamental Physics
LandCanada
ByPACIFIC GROVE
Periode31/08/199804/09/1998

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