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Measurement of shower development and its Moli\`ere radius with a four-plane LumiCal test set-up

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arxiv 1705.03885 v2 pith:SFKKVJ3Q submitted 2017-05-10 physics.ins-det

Measurement of shower development and its Moli\`ere 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
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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
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classification physics.ins-det
keywords showerbeamdevelopmentfour-planemoliradiustestaccelerator
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A 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 Moli\`ere 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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