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The LHCf Collaboration

The LHCf Collaboration. CERN D.Macina, A.L. Perrot. USA LBNL Berkeley: W. Turner. FRANCE Ecole Politechnique Paris: M. Haguenauer. SPAIN IFIC Valencia: A.Fauss, J.Velasco. JAPAN: STE Laboratory of Nagoya University: K.Fukui, Y.Itow, T.Mase, K.Masuda,

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The LHCf Collaboration

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  1. The LHCf Collaboration CERN D.Macina, A.L. Perrot USA LBNL Berkeley: W. Turner FRANCE Ecole Politechnique Paris: M. Haguenauer SPAIN IFIC Valencia: A.Fauss, J.Velasco JAPAN: STE Laboratory of Nagoya University: K.Fukui, Y.Itow, T.Mase, K.Masuda, Y.Matsubara,H.Matsumoto,H.Menjo, T.Sako, K.Taki, H.Watanabe Konan Univ. Kobe: Y.Muraki RISE Waseda Univ. Tokyo: K.Kasahara, M.Mizuishi,Y.Shimizu, S.Torii Shibaura Univ. Saitama: K.Yoshida Kanagawa Univ. Yokohama: T.Tamura ITALY Firenze University and INFN: O.Adriani, L.Bonechi, M.Bongi, G.Castellini, R.D’Alessandro, P.Papini, S. Ricciarini, A. Viciani Catania University and INFN: A.Tricomi

  2. LHCf experiment Study of p0and n production cross sections as functions of pT in the very forward region of LHC. Calibration at high energy (LHC: 1017eV in the LAB frame) of Montecarlo codes used for the reconstruction of atmospheric showers produced by very high energy primary cosmic rays Simulation of an atmospheric shower initiated by a 1019 eV proton LHCf experimental method is based on 2independent detectors installed on both sides of IP1 ATLAS INTERACTION POINT (IP1) Detector I Tungsten Scintillator Scintillating fibers Detector II Tungsten Scintillator Silicon m-strips 140 m 140 m n g p0 g Beam line

  3. m-strip silicon layers tungsten layers scintillating fibers The LHCf detectors tungsten layers 3232 mm2 2525 mm2 scintillators ARM #2 4040 mm2 2020 mm2 scintillators ARM #1 ~9cm ~30cm ~9cm ~30cm

  4. p0energy spectrum Expected results p0 mass resolution Excellent tool to calibrate the energy measurement! Dm/m = 5% Model dependence of neutron energy distribution Spatial resolution for Arm#2 Arm #1 DE/E<3%@200GeV <200 mm spatial resolution Arm #2 DE/E<3%@200GeV <100 mm spatial resolution Electrons 200GeV s=52mm

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