Speaker
Description
The Barrel Imaging Calorimeter (BIC) of the ePIC detector at the upcoming Electron–Ion Collider (EIC) consists of silicon pixel layers for precise shower profile measurements and a high-granularity sampling calorimeter of lead absorbers interleaved with scintillating fibers for energy measurement. This work focuses on the readout development for the sampling calorimeter section, where a compact system coupling a light guide to a silicon photomultiplier (SiPM) has been designed to operate in a strong magnetic field with limited space. We report a comparative study of multiple readout configurations, focusing on photon collection efficiency, spatial uniformity, and linearity over a broad energy range. Beam tests with electron beams at KEK PF-AR and CERN PS T10 were performed, and the results are compared with Geant4 optical simulations incorporating measured material properties. In this talk, we present the comparison of beam test and simulation results to evaluate the performance of the SiPM–light guide readout and discuss its implications for integration into the BIC at the EIC.
