The high-intensity hyperon beam at CERN

Yu A. Alexandrov, M. Clement, F. Dropmann, A. Fournier, P. Grafström, E. Hubbard, S. Paul, L. Schmitt, H. W. Siebert, A. Trombini, M. Zavertiaev

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A high-intensity hyperon beam was constructed at CERN to deliver Σ- to experiment WA89 at the Omega facility and operated from 1989 to 1994. The setup allowed rapid changeover between hyperon and conventional hadron beam configurations. The beam provided a Σ- flux of 1.4 x 105 per burst at mean momenta between 330 and 345 GeV/c produced by about 3 x 1010 protons of 450 GeV/c. At the experiment target the beam had a Σ-- ratio close to 0.4 and a size of 1.6 x 3.7cm2. The beam particle trajectories and their momenta were measured with a scintillating fibre hodoscope in the beam channel and a silicon microstrip detector at the exit of the channel. A fast transition radiation detector was used to identify the pion component of the beam.

Original languageEnglish
Pages (from-to)359-372
Number of pages14
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number2-3
StatePublished - 11 May 1998
Externally publishedYes


  • Hyperon beam
  • Hyperon production
  • Σ and Ξ production


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