Abstract
Among the variety of crystal calorimeters recently designed for several physics facilities, CALIFA (CALorimeter for In-Flight emitted gAmmas and light-charged particles) hasespecially demanding requirements since it must perform within avery complicated energy domain (gamma-ray energies from 0.1 to 20 MeVand up to 300 MeV protons). As part of the R&D program for the Barrelsection of CALIFA, a reduced geometry prototype was constructed. Thisprototype consisted of a 3 × 5 array of CsI(Tl) crystals of varyingdimensions, coupled to large area avalanche photodiodes. Here reportedare the details regarding the construction of the prototype and theexperimental results obtained at the NEPTUN tagged gamma beamfacility, reconstructing gamma energies up to 10 MeV. Dedicated MonteCarlo simulations of the setup were also performed, enabling a deeperunderstanding of the experimental data. The experimental resultsdemonstrate the effectiveness of the reconstruction method and helpedto establish the most suitable crystal geometry to be employed withinthe forthcoming calorimeter.
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