Design Concept for an Imaging Barrel Electromagnetic Calorimeter for the EIC

The Electron-Ion Collider (EIC) will be an experimental facility to explore the gluons in nucleons and nuclei, shedding light on their structure and the interactions within them. Physics goals at the EIC lead to unique requirements for the barrel electromagnetic calorimeter design. The electron energy and shower profile measurements play a crucial role in the separation of electrons from background pions in Deep Inelastic Scattering processes. Moreover, the calorimeter must measure the energy and coordinates of photons and identify single photons originating from, e.g., the Deeply Virtual Compton Scattering process and photon pairs from π⁰ decays. We propose a design concept for the barrel electromagnetic calorimeter in the central detector region. Our hybrid design utilizes scintillating fibers embedded in Pb and imaging calorimetry based on monolithic silicon sensors (AstroPix). We have studied the proposed calorimeter in detail through realistic simulations to test it against the main requirements for the physics case of the EIC described in the community Yellow Report. In this talk, I will present the expected calorimeter performance based on simulations for the ATHENA (A Totally Hermetic Electron-Nucleus Apparatus) detector setup with a 3 T magnetic field, as well as for the EIC Detector-I with a 1.5 T magnetic field.