Carbon Fiber Structure for B.G.O. Crystals of an Electromagnetic Calorimeter for Energies Around and Above 2 GeV

Abstract

This document describes a project to construct with composite material an Electromagnetic Calorimeter for a large, solid angle crystal ball for energies around and above 2 GeV, with thin walls (0.36 mm) and a complex figure like a “Rugby Ball” (see Figure 1). The contract was between the National Institute of Nuclear Physics (INFN) of Frascati, Genova, Catania, and Roma, and ITALCOMPOSITI—a joint venture between Agusta Group (50%) and ENI (50%) to research, produce and market advanced prepreg materials and composite structural components for aerospace, defense, energy, and transport applications). The contract concerns the design and the realization of the structure, which consists of 24 baskets containing 480 crystals of B.G.O. weighing about 4 Kg, each with full alveolus, including electronic systems.