Electromagnetic calorimeters used in high-energy physics and astrophysics rely heavily on high-Z inorganic scintillators, such as lead tungstate (PbWO4 or PWO). The crystalline structure and lattice orientation of inorganic scintillators are frequently underestimated in detector design, even though it is known that the crystalline lattice strongly modifies the features of the electromagnetic processes inside the crystal. A novel method has been developed for precisely bonding PWO crystals with aligned atomic planes within 100 {\mu}rad, exploiting X-ray diffraction (XRD) to accurately measure miscut angles. This method demonstrates the possibility to align a layer of crystals along the same crystallographic direction, opening a new technological path towards the development of next-generation electromagnetic calorimeters.
@article{arxiv.2503.17053,
title = {High-Precision Alignment Techniques for Realizing an Ultracompact Electromagnetic Calorimeters Using Oriented high-Z Scintillator Crystals},
author = {Lorenzo Malagutti and Alessia Selmi and Laura Bandiera and Vladimir Baryshevsky and Luca Bomben and Nicola Canale and Stefano Carsib and Mattia Ciliberti and Davide De Salvadore and Vincenzo Guidi and Viktar Haurylavets and Mikhail Korjik and Giulia Lezzani and Alexander Lobko and Sofia Mangiacavalli and Andrea Mazzolari and Pietro Monti-Guarnieri and Matthew Moulson and Riccardo Negrelloa and Gianfranco Paternò and Leonardo Perna and Christian Petroselli and Michela Prest and Marco Romagnoni and Francesco Sgarbossa and Mattia Soldani and Alexei Sytov and Melissa Tamisari and Victor Tikhomirov and Erik Vallazza and Davide Valzani and Giorgio Zuccalà},
journal= {arXiv preprint arXiv:2503.17053},
year = {2025}
}