SiΛvio: A trigger for Λ-hyperons

Robert Münzer, Martin Berger, Laura Fabbietti, R. Averbeck, A. Andronic, V. Barret, Z. Basrak, N. Bastid, M. L. Benabderrahmane, P. Buehler, M. Cargnelli, R. Čaplar, I. Carevic, V. Charviakova, P. Crochet, I. Deppner, P. Dupieux, M. Dželalija, Z. Fodor, P. GasikI. Gašparić, Y. Grishkin, O. N. Hartmann, N. Herrmann, K. D. Hildenbrand, B. Hong, T. I. Kang, J. Kecskemeti, Y. J. Kim, M. Kirejczyk, M. Kiš, P. Koczon, R. Kotte, A. Lebedev, Y. Leifels, J. L. Liu, X. Lopez, V. Manko, J. Marton, T. Matulewicz, M. Petrovici, K. Piasecki, F. Rami, A. Reischl, W. Reisdorf, M. S. Ryu, P. Schmidt, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, K. Suzuki, Z. Tyminski, P. Wagner, E. Widmann, K. Wiśniewski, Z. G. Xiao, T. Yamazaki, I. Yushmanov, X. Y. Zhang, A. Zhilin, V. Zinyuk, J. Zmeskal

Research output: Contribution to journalArticlepeer-review


As online trigger for events containing Λ hyperons in p+p collisions at 3.1 GeV a silicon-based device has been designed and built. This system has been integrated close to the target region within the FOPI spectrometer at GSI and was also employed as a tracking device to improve the vertex reconstruction of secondary decays. The design of the detector components, read-out, the trigger capability as well as the tracking performance are presented. An enrichment factor of about 14 was achieved for events containing a Λ-hyperon candidate.

Original languageEnglish (US)
Pages (from-to)38-49
Number of pages12
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
StatePublished - May 1 2014


  • APV25
  • MIPS
  • Mesytec
  • Silicon
  • Trigger
  • Λ

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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