Measurement of shower development and its Molière radius with a four-plane LumiCal test set-up

H. Abramowicz,A. Abusleme, K. Afanaciev, Y. Benhammou, L. Bortko, O. Borysov,M. Borysova,I. Bozovic-Jelisavcic, G. Chelkov,W. Daniluk,D. Dannheim,K. Elsener,M. Firlej,E. Firu,T. Fiutowski,V. Ghenescu, M. Gostkin, M. Hempel,H. Henschel,M. Idzik,A. Ignatenko,A. Ishikawa,S. Kananov, O. Karacheban, W. Klempt, S. Kotov,J. Kotula,D. Kozhevnikov, V. Kruchonok,B. Krupa, Sz. Kulis,W. Lange,J. Leonard,T. Lesiak,A. Levy,I. Levy, W. Lohmann,S. Lukic,J. Moron,A. Moszczynski,A. T. Neagu, F.-X. Nuiry,M. Pandurovic,B. Pawlik,T. Preda, O. Rosenblat, A. Sailer,B. Schumm, S. Schuwalow,I. Smiljanic,P. Smolyanskiy,K. Swientek, P. Terlecki,U. I. Uggerhoj,T. N. Wistisen,T. Wojton,H. Yamamoto,L. Zawiejski,I. S. Zgura,A. Zhemchugov

The European Physical Journal C（2018）

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摘要

prototype of a luminometer, designed for a future e^+e^- collider detector, and consisting at present of a four-plane module, was tested in the CERN PS accelerator T9 beam. The objective of this beam test was to demonstrate a multi-plane tungsten/silicon operation, to study the development of the electromagnetic shower and to compare it with MC simulations. The Molière radius has been determined to be 24.0 ± 0.6 (stat.) ± 1.5 (syst.) mm using a parametrization of the shower shape. Very good agreement was found between data and a detailed Geant4 simulation.

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