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Measurement of Pion and Proton Response and Longitudinal Shower Profiles up to 20 Nuclear Interaction Lengths with the ATLAS Tile Calorimeter
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Vise andre og tillknytning
2010 (engelsk)Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 615, nr 2, s. 158-181Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The response of pions and protons in the energy range of 20–180 GeV, produced at CERN's SPS H8 test-beam line in the ATLAS iron–scintillator Tile hadron calorimeter, has been measured. The test-beam configuration allowed the measurement of the longitudinal shower development for pions and protons up to 20 nuclear interaction lengths. It was found that pions penetrate deeper in the calorimeter than protons. However, protons induce showers that are wider laterally to the direction of the impinging particle. Including the measured total energy response, the pion-to-proton energy ratio and the resolution, all observations are consistent with a higher electromagnetic energy fraction in pion-induced showers. The data are compared with GEANT4 simulations using several hadronic physics lists. The measured longitudinal shower profiles are described by an analytical shower parametrization within an accuracy of 5–10%. The amount of energy leaking out behind the calorimeter is determined and parametrized as a function of the beam energy and the calorimeter depth. This allows for a leakage correction of test-beam results in the standard projective geometry.

sted, utgiver, år, opplag, sider
2010. Vol. 615, nr 2, s. 158-181
Emneord [en]
Calorimeter, Test-beam, ATLAS, Monte Carlo simulation, GEANT4, Hadronic shower development, Pion–proton response, Longitudinal shower profile for hadrons
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fysik
Identifikatorer
URN: urn:nbn:se:su:diva-37548DOI: 10.1016/j.nima.2010.01.037ISI: 000276299900002OAI: oai:DiVA.org:su-37548DiVA, id: diva2:303252
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Publikationen har totalt 220 författare, P. Adragna et al.

Tilgjengelig fra: 2010-03-11 Laget: 2010-03-11 Sist oppdatert: 2018-08-06bibliografisk kontrollert

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Bergeås Kuutmann, ElinBohm, ChristianClément, ChristopheEriksson, DanielGellerstedt, KarlHellman, StenHolmgren, Sven-OlofJon-And, KerstinNordkvist, BjörnSelldén, BjörnSjölin, JörgenTylmad, Maja
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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