Calibrating the Prototype Calorimeter for the GAMMA-400 γ-Ray Telescope on the Positron Beam at the Pakhra Accelerator. - Suchkov, S. I.; Arkhangelskiy, A. I.; Baskov, V. A.; Galper, A. M.; Dalkarov, O. D.; L'vov, A. I.; Pappe, N. Yu.; Polyansky, V. V.; Topchiev, N. P.; Chernysheva, I. V. (Instruments & Experimental Techniques, 2021)