Albedo in the ATIC experiment: Measurements and simulations

N. V. Sokolskaya, Lomonosov Moscow State University
J. H. Adams, NASA Marshall Space Flight Center
H. S. Ahn, University of Maryland, College Park
K. E. Batkov, Lomonosov Moscow State University
G. L. Bashindzhagyan, Lomonosov Moscow State University
J. Z. Wang, University of Maryland, College Park
J. P. Wefel, Louisiana State University
J. Wu, University of Maryland, College Park
O. Ganel, University of Maryland, College Park
T. G. Guzik, Louisiana State University
R. M. Gunasingha, Southern University and A&M College
V. I. Zatsepin, Lomonosov Moscow State University
J. Isbert, Louisiana State University
K. C. Kim, University of Maryland, College Park
M. Christl, NASA Marshall Space Flight Center
E. N. Kouznetsov, Lomonosov Moscow State University
M. I. Panasyuk, Lomonosov Moscow State University
A. D. Panov, Lomonosov Moscow State University
E. S. Seo, University of Maryland, College Park
A. R. Fazely, Southern University and A&M College
J. Chang, Max Planck Institute for Solar System Research
W. K.H. Schmidt, Max Planck Institute for Solar System Research

Abstract

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. © 2005 Pleiades Publishing, Inc.