1. SiΛvio: A trigger for Λ-hyperons
- Author
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Z. Fodor, A. Lebedev, K. Siwek-Wilczyńska, Xavier Bernard Lopez, P. Koczon, Z. Basrak, Xiang Yang Zhang, Vladislav Manko, K. Wiśniewski, Fouad Rami, Mihai Petrovici, K. Suzuki, Anton Andronic, T. Yamazaki, W. Reisdorf, Valerie Ramillien Barret, P. Gasik, I. Carevic, T. I. Kang, Eberhard Widmann, J. L. Liu, Y. Leifels, Byung-Sik Hong, A. Zhilin, Paul Kienle, P. Schmidt, A. Reischl, K. S. Sim, Johann Marton, Pascal Dupieux, Y. Grishkin, O. N. Hartmann, V. Charviakova, Ralf Peter Averbeck, Z. Tyminski, N. Herrmann, K. D. Hildenbrand, J. Zmeskal, Igor Gašparić, J. Kecskemeti, M. Kirejczyk, M. Berger, R. H. Munzer, B. Sikora, Paul Buehler, Nicole Bastid, Z. Seres, I. Deppner, Krzysztof Piasecki, A. Schüttauf, R. Čaplar, M. Dželalija, M. Kiš, V. T. Smolyankin, M. S. Ryu, Michael Cargnelli, Zhigang Xiao, Yongsun Kim, M. L. Benabderrahmane, P. Wagner, R. Kotte, V. Simion, T. Matulewicz, P. Crochet, V. Zinyuk, Laura Fabbietti, and I. E. Yushmanov
- Subjects
Physics ,silicon ,Mesytec ,APV25 ,MIPS ,Λ ,trigger ,Nuclear and High Energy Physics ,Silicon ,Spectrometer ,010308 nuclear & particles physics ,Detector ,Hyperon ,chemistry.chemical_element ,Lambda-hyperons ,01 natural sciences ,Vertex (geometry) ,Nuclear physics ,Si Lambda vio ,chemistry ,0103 physical sciences ,010306 general physics ,Instrumentation - Abstract
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.
- Published
- 2014
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