Alessia Selmi
(Università degli Studi dell'Insubria)
Inorganic scintillators are widely used to build compact and high energy
resolution homogeneous electromagnetic calorimeters. In recent years, several
studies have been performed on the fact that their crystalline nature can heavily
affect the Bremsstrahlung and Pair Production mechanisms. In fact, experimen-
tal tests have shown that when the incident beam is aligned with the crystal axes
within some tenths of a degree, the electromagnetic shower development is ac-
celerated. The ORiEnted calOrimeter (OREO) project intends to assemble and
test an electromagnetic calorimeter prototype based on oriented crystals. The
calorimeter will consist of a 3×3 matrix of 5 radiation length oriented PWO-UF
(Ultra-Fast) crystals readout by SiPMs, followed by non oriented crystals. The
most challenging aspect of the design is to keep the crystals aligned when ar-
ranged in a matrix structure. This contribution will present the results obtained
with a 3 × 1 and a 2 × 2 matrix of PWO-UF oriented crystals during the Oreo
2023 beamtests with 6-15 GeV/c electrons on the T9 beamline at the CERN
PS and with 20-150 GeV/c electrons on the H2 beamline at the CERN SPS.
The results demonstrate for the first time ever the possibility to align a layer of
crystals along the same crystallographic direction, opening a new technological
path towards the development of a highly compact calorimeter. The contri-
bution will explore also the particle identification capability of such a system:
since the nuclear interaction length is unaffected by the lattice orientation, the
calorimeter oriented crystal layer is an instrument that is sensitive to photons
and blind to hadrons. These features make such a calorimeter of interest for
high energy physics experiments (forward calorimeter in colliders such as in
the CERN HIKE-KLEVER experiment, fixed target experiments) but also for
space-borne γ ray telescopes.
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Alessia Selmi
(Università degli Studi dell'Insubria)
Alberto Gianoli
(Istituto Nazionale di Fisica Nucleare)
Alexander Lobko
(Institute for Nuclear Problems, Belarus State University)
Alexei Sytov
(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara; Korea Institute of Science and Technology Information)
Mr
Andrea
(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Ferrara, Italy)
Christian Petroselli
(Istituto Nazionale di Fisica Nucleare)
Davide De Salvador
(Istituto Nazionale di Fisica Nucleare)
Erik Silvio Vallazza
(Istituto Nazionale di Fisica Nucleare)
Fabrizio Davì
(DICEA-Università Politecnica delle Marche)
Dr
Francesco Sgarbossa
(University of Padova & INFN Legnaro National Lab.)
Dr
Gianfranco Paternò
(Istituto Nazionale di Fisica Nucleare)
Giosuè Saibene
Ms
Giulia Lezzani
(Università degli Studi dell'Insubria)
LAURA BANDIERA
(Istituto Nazionale di Fisica Nucleare)
Mr
Lorenzo Malagutti
(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Ferrara, Italy)
Luca Bomben
(Istituto Nazionale di Fisica Nucleare)
Mr
Luigi Montalto
(Marche Polytechnic University Ancona, Italy)
Marco Romagnoni
(Istituto Nazionale di Fisica Nucleare)
Matthew David Moulson
(Istituto Nazionale di Fisica Nucleare)
Mattia Soldani
(Università degli Studi dell'Insubria, INFN Milano Bicocca)
Michela Prest
(Istituto Nazionale di Fisica Nucleare)
Mr
Mikhail Korjik
(Belarusian State University Minsk, Belarus)
Nicola Canale
(Istituto Nazionale di Fisica Nucleare)
Mr
Perna Leonardo
(Università degli Studi dell'Insubria)
Pietro Monti-Guarnieri
Mr
Riccardo Negrello
(Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Ferrara, Italy)
Sara Cutini
(Istituto Nazionale di Fisica Nucleare)
Dr
Stefano Carsi
(Università degli Studi dell'Insubria)
Victor Tikhomirov
(Research Institute for Nuclear Problems)
Viktar Haurylavets
(INP)
Vincenzo Guidi
(Istituto Nazionale di Fisica Nucleare)
Vladimir Baryshevsky
(Research Institute for Nuclear Problems)
Ms
sofia Mangiacavalli
(Università degli Studi dell'Insubria)
