LKr barrel calorimeter gives the possibility to obtain an energy resolution for photons with energy in the range 30-5000 MeV comparable with that of NaI or CsI calorimeters and much better position resolution, due to possibility of measuring the photon conversion point. Furthermore, the fine granularity of the calorimeter provides information for particle identification based on dE/dx method as well as e/pi separation using the shower longitudinal structure.