Performance and Molière radius measurements using a compact prototype of LumiCal in an electron test beam

• Main Authors: H. Abramowicz, A. Abusleme, K. Afanaciev, Y. Benhammou, O. Borysov, M. Borysova, I. Bozovic-Jelisavcic, W. Daniluk, D. Dannheim, M. Demichev, K. Elsener, M. Firlej, E. Firu, T. Fiutowski, V. Ghenescu, M. Gostkin, M. Hempel, H. Henschel, M. Idzik, A. Ignatenko, A. Ishikawa, A. Joffe, G. Kacarevic, S. Kananov, O. Karacheban, W. Klempt, S. Kotov, J. Kotula, U. Kruchonak, Sz. Kulis, W. Lange, J. Leonard, T. Lesiak, A. Levy, I. Levy, L. Linssen, W. Lohmann, J. Moron, A. Moszczynski, A. T. Neagu, B. Pawlik, T. Preda, A. Sailer, B. Schumm, S. Schuwalow, E. Sicking, K. Swientek, B. Turbiarz, N. Vukasinovic, T. Wojton, H. Yamamoto, L. Zawiejski, I. S. Zgura, A. Zhemchugov
• Format: Article
• Language: English
• Published: SpringerOpen 2019-07-01
• Series: European Physical Journal C: Particles and Fields
• Online Access: http://link.springer.com/article/10.1140/epjc/s10052-019-7077-9

Abstract A new design of a detector plane of sub-millimetre thickness for an electromagnetic sampling calorimeter is presented. It is intended to be used in the luminometers LumiCal and BeamCal in future linear e$$^{+}$$ + e$$^{-}$$ - collider experiments. The detector planes were produced utilising novel connectivity scheme technologies. They were installed in a compact prototype of the calorimeter and tested at DESY with an electron beam of energy 1–5 GeV. The performance of a prototype of a compact LumiCal comprising eight detector planes was studied. The effective Molière radius at 5 GeV was determined to be (8.1 ± 0.1 (stat) ± 0.3 (syst)) mm, a value well reproduced by the Monte Carlo (MC) simulation (8.4 ± 0.1) mm. The dependence of the effective Molière radius on the electron energy in the range 1–5 GeV was also studied. Good agreement was obtained between data and MC simulation.