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Title	Development of the upgraded LHCf calorimeter with $Gd_2SiO_5$ (GSO) scintillators
Author(s)	Makino, Yuya (Nagoya U.) ; Adriani, O (Florence U. ; INFN, Florence) ; Berti, E (Florence U. ; INFN, Florence) ; Bonechi, L (INFN, Florence) ; Bongi, M (INFN, Florence ; Florence U.) ; Castellini, G (INFN, Florence ; IFAC, Florence) ; D’Alessandro, R (INFN, Florence ; Florence U.) ; Del Prete, M (INFN, Florence ; Florence U.) ; Haguenauer, M (Ecole Polytechnique) ; Itow, Y (Nagoya U., Solar-Terrestrial Environ. Lab. ; KMI, Nagoya) ; Kasahara, K (Waseda U., RISE) ; Masuda, K (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Matsubayashi, E (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Menjo, H (Nagoya U.) ; Mitsuka, G (Nagoya U., Solar-Terrestrial Environ. Lab. ; Florence U.) ; Perrot, A L (CERN) ; Ricciarini, S (INFN, Florence ; IFAC, Florence) ; Sako, T (Nagoya U., Solar-Terrestrial Environ. Lab. ; KMI, Nagoya) ; Sakurai, N (KMI, Nagoya) ; Sugiura, Y (Nagoya U., Solar-Terrestrial Environ. Lab.) ; Suzuki, T (Waseda U., RISE) ; Tamura, T (CERN) ; Tiberio, A (Florence U. ; INFN, Florence) ; Torii, S (Waseda U., RISE) ; Tricomi, A (INFN, Catania ; Catania U.) ; Turner, W C (LBNL, Berkeley) ; Zhou, Q D (Nagoya U., Solar-Terrestrial Environ. Lab.)
Publication	SISSA, 2014
In:	PoS TIPP2014 (2014) 028
In:	International Conference on Technology and Instrumentation in Particle Physics 2014, Amsterdam, Netherlands, 2 - 6 Jun 2014, pp.028
DOI	10.22323/1.213.0028
Subject category	Detectors and Experimental Techniques
Abstract	The Large Hadron Collider forward (LHCf) experiment was motivated to understand the hadronic interaction relevant to the cosmic-ray air shower development. LHCf has installed compact calorimeters at the LHC and observed neutral particles emitted around zero degree during 0.9, 2.76 and 7 TeV pp collisions and 5 TeV pPb collisions. Since the next operation in 2015 is expected under much higher radiation dose, we have upgraded the detectors, especially their scin- tillators, to be radiation harder. In this paper, we report the performance of the new imaging sensor, GSO-bar hodoscope tested by heavy-ion beam and 50-250 GeV electron beams. As the result, shower-peak position resolution of 123 m m for 100 GeV electron induced showers was achieved that is satisfactory for our physics goal
Copyright/License	publication: © 2014-2025 The Author(s) (License: CC-BY-NC-SA-4.0) CC-BY-NC-SA

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