ELEMENTARY PARTICLES AND FIELDS Experiment Albedo in the ATIC Experiment: Measurements and Simulations

We analyze the characteristics of the albedo, or the backscatter current, which constitutes a background for charge measurements in calorimetric experiments in high-energy cosmic rays. We compare the experimental data obtained in the flights of the ATIC spectrometer with the simulations performed using the GEANT 3.21 code. We discuss the influence of the backscatter on the charge resolution in the ATIC experiment. c � 2005 Pleiades Publishing, Inc.