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Hyperfine Interactions

, Volume 229, Issue 1–3, pp 139–146 | Cite as

Beam life time studies and design optimization of the Ultra-low energy Storage Ring

  • C. P. Welsch
  • A. I. Papash
  • J. Harasimowicz
  • O. Karamyshev
  • G. A. Karamysheva
  • D. Newton
  • M. Panniello
  • M. Putignano
  • M. R. F. Siggel-King
  • A. Smirnov
Article
  • 70 Downloads

Abstract

The Ultra-low energy electrostatic Storage Ring (USR) at the future Facility for Low-energy Antiproton and Ion Research (FLAIR) will provide cooled beams of antiprotons in the energy range between 300 keV down to 20 keV. Based on the original design concept developed in 2005, the USR has been completely redesigned over the past few years by the QUASAR Group. The ring structure is now based on a ’split achromat’ lattice. This ensures compact ring dimensions of 10 m × 10 m, whilst allowing both, in-ring experiments with gas jet targets and studies with extracted beams. In the USR, a wide range of beam parameters shall be provided, ranging from very short pulses in the nanosecond regime to a coasting beam. In addition, a combined fast and slow extraction scheme will be featured that allows for providing external experiments with cooled beams of different time structure. Detailed investigations into the dynamics of low energy beams, including studies into the long term beam dynamics and ion kinetics, beam life time, equilibrium momentum spread and equilibrium lateral spread during collisions with an internal target were carried out. This required the development of new simulation tools to further the understanding of beam storage with electrostatic fields. In addition, studies into beam diagnostics methods for the monitoring of ultra-low energy ions at beam intensities less than 10 6 were carried out. This includes instrumentation for the early commissioning of the machine, as well as for later operation with antiprotons. In this paper, on overview of the technical design of the USR is given with emphasis on two of the most important operating modes, long term beam dynamics and the design of the beam diagnostics system.

Keywords

Storage Ring Low energy beam Antiprotons Life time Beam diagnostics 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • C. P. Welsch
    • 1
  • A. I. Papash
    • 2
  • J. Harasimowicz
    • 1
  • O. Karamyshev
    • 1
  • G. A. Karamysheva
    • 2
  • D. Newton
    • 1
  • M. Panniello
    • 2
  • M. Putignano
    • 1
  • M. R. F. Siggel-King
    • 1
  • A. Smirnov
    • 2
  1. 1.Cockcroft Institute, The University of LiverpoolLiverpoolUK
  2. 2.Max Planck Institute for Nuclear PhysicsHeidelbergGermany

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